./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 f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/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-?-f4b24e3 [2022-07-14 00:11:08,102 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 00:11:08,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 00:11:08,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 00:11:08,144 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 00:11:08,145 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 00:11:08,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 00:11:08,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 00:11:08,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 00:11:08,152 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 00:11:08,153 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 00:11:08,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 00:11:08,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 00:11:08,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 00:11:08,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 00:11:08,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 00:11:08,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 00:11:08,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 00:11:08,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 00:11:08,166 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 00:11:08,168 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 00:11:08,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 00:11:08,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 00:11:08,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 00:11:08,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 00:11:08,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 00:11:08,173 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 00:11:08,173 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 00:11:08,174 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 00:11:08,174 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 00:11:08,175 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 00:11:08,175 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 00:11:08,176 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 00:11:08,177 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 00:11:08,177 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 00:11:08,178 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 00:11:08,178 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 00:11:08,178 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 00:11:08,178 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 00:11:08,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 00:11:08,179 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 00:11:08,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 00:11:08,181 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-14 00:11:08,196 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 00:11:08,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 00:11:08,196 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 00:11:08,196 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 00:11:08,197 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 00:11:08,197 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 00:11:08,198 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 00:11:08,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 00:11:08,198 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 00:11:08,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 00:11:08,199 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 00:11:08,199 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 00:11:08,199 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-14 00:11:08,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 00:11:08,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-14 00:11:08,199 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-14 00:11:08,200 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 00:11:08,200 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-14 00:11:08,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 00:11:08,200 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 00:11:08,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 00:11:08,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 00:11:08,201 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 00:11:08,201 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 00:11:08,202 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-14 00:11:08,202 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 00:11:08,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 00:11:08,202 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-14 00:11:08,202 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-14 00:11:08,202 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-14 00:11:08,202 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cccbd170603672b3f74a5336cc730c4afa341837cef68e5226707c3c82e670c [2022-07-14 00:11:08,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 00:11:08,419 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 00:11:08,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 00:11:08,422 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 00:11:08,422 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 00:11:08,423 INFO L432 ainManager$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 [2022-07-14 00:11:08,489 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73ee15f44/b063ef2c785f4079ba18c3871bdc20cc/FLAG5bbc818af [2022-07-14 00:11:09,014 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 00:11:09,015 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 [2022-07-14 00:11:09,042 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73ee15f44/b063ef2c785f4079ba18c3871bdc20cc/FLAG5bbc818af [2022-07-14 00:11:09,490 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73ee15f44/b063ef2c785f4079ba18c3871bdc20cc [2022-07-14 00:11:09,492 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 00:11:09,493 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 00:11:09,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 00:11:09,495 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 00:11:09,497 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 00:11:09,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 12:11:09" (1/1) ... [2022-07-14 00:11:09,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67378e71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 12:11:09, skipping insertion in model container [2022-07-14 00:11:09,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 12:11:09" (1/1) ... [2022-07-14 00:11:09,503 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 00:11:09,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 00:11:10,070 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] [2022-07-14 00:11:10,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 00:11:10,418 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 00:11:10,555 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] [2022-07-14 00:11:10,632 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 00:11:10,717 INFO L208 MainTranslator]: Completed translation [2022-07-14 00:11:10,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 12:11:10 WrapperNode [2022-07-14 00:11:10,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 00:11:10,720 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 00:11:10,720 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 00:11:10,720 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 00:11:10,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 12:11:10" (1/1) ... [2022-07-14 00:11:10,782 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 12:11:10" (1/1) ... [2022-07-14 00:11:10,852 INFO L137 Inliner]: procedures = 181, calls = 601, calls flagged for inlining = 90, calls inlined = 85, statements flattened = 2002 [2022-07-14 00:11:10,853 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 00:11:10,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 00:11:10,854 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 00:11:10,854 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 00:11:10,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 12:11:10" (1/1) ... [2022-07-14 00:11:10,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 12:11:10" (1/1) ... [2022-07-14 00:11:10,874 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 12:11:10" (1/1) ... [2022-07-14 00:11:10,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 12:11:10" (1/1) ... [2022-07-14 00:11:10,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 12:11:10" (1/1) ... [2022-07-14 00:11:10,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 12:11:10" (1/1) ... [2022-07-14 00:11:10,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 12:11:10" (1/1) ... [2022-07-14 00:11:10,973 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 00:11:10,974 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 00:11:10,974 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 00:11:10,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 00:11:10,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 12:11:10" (1/1) ... [2022-07-14 00:11:10,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 00:11:10,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 00:11:11,001 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-14 00:11:11,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-14 00:11:11,026 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb_14 [2022-07-14 00:11:11,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb_14 [2022-07-14 00:11:11,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-14 00:11:11,026 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2022-07-14 00:11:11,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-14 00:11:11,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-14 00:11:11,026 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-07-14 00:11:11,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-07-14 00:11:11,027 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-14 00:11:11,027 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-07-14 00:11:11,027 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-07-14 00:11:11,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-07-14 00:11:11,027 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-07-14 00:11:11,027 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2022-07-14 00:11:11,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2022-07-14 00:11:11,028 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-14 00:11:11,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-14 00:11:11,028 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-07-14 00:11:11,028 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-07-14 00:11:11,028 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_data_transmit [2022-07-14 00:11:11,028 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_data_transmit [2022-07-14 00:11:11,028 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2022-07-14 00:11:11,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2022-07-14 00:11:11,029 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-07-14 00:11:11,029 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-07-14 00:11:11,029 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_ioctl [2022-07-14 00:11:11,029 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_ioctl [2022-07-14 00:11:11,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-14 00:11:11,029 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_timeout [2022-07-14 00:11:11,029 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_timeout [2022-07-14 00:11:11,029 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-07-14 00:11:11,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-07-14 00:11:11,030 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-07-14 00:11:11,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-07-14 00:11:11,030 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-07-14 00:11:11,030 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-07-14 00:11:11,031 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-14 00:11:11,031 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-14 00:11:11,031 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-07-14 00:11:11,031 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-07-14 00:11:11,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-14 00:11:11,031 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-07-14 00:11:11,031 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-07-14 00:11:11,031 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free_int [2022-07-14 00:11:11,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free_int [2022-07-14 00:11:11,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-14 00:11:11,032 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_change_mtu [2022-07-14 00:11:11,032 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_change_mtu [2022-07-14 00:11:11,032 INFO L130 BoogieDeclarations]: Found specification of procedure x25_type_trans [2022-07-14 00:11:11,032 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_type_trans [2022-07-14 00:11:11,033 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2022-07-14 00:11:11,033 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2022-07-14 00:11:11,033 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_unlock [2022-07-14 00:11:11,033 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_unlock [2022-07-14 00:11:11,033 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_compat_ioctl [2022-07-14 00:11:11,034 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_compat_ioctl [2022-07-14 00:11:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-14 00:11:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-14 00:11:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2022-07-14 00:11:11,035 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2022-07-14 00:11:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_data_indication [2022-07-14 00:11:11,035 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_data_indication [2022-07-14 00:11:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2022-07-14 00:11:11,036 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2022-07-14 00:11:11,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-14 00:11:11,036 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2022-07-14 00:11:11,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2022-07-14 00:11:11,036 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_disconnected [2022-07-14 00:11:11,036 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_disconnected [2022-07-14 00:11:11,036 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2022-07-14 00:11:11,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2022-07-14 00:11:11,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 00:11:11,037 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2022-07-14 00:11:11,037 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2022-07-14 00:11:11,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-14 00:11:11,040 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2022-07-14 00:11:11,040 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2022-07-14 00:11:11,040 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_connected [2022-07-14 00:11:11,040 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_connected [2022-07-14 00:11:11,040 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-07-14 00:11:11,040 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-07-14 00:11:11,041 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-07-14 00:11:11,041 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-07-14 00:11:11,041 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-07-14 00:11:11,041 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-07-14 00:11:11,041 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-07-14 00:11:11,041 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-07-14 00:11:11,041 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-07-14 00:11:11,041 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-07-14 00:11:11,042 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-07-14 00:11:11,042 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-07-14 00:11:11,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-14 00:11:11,042 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2022-07-14 00:11:11,042 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2022-07-14 00:11:11,043 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2022-07-14 00:11:11,043 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2022-07-14 00:11:11,043 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-07-14 00:11:11,043 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-07-14 00:11:11,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-07-14 00:11:11,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 00:11:11,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 00:11:11,044 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2022-07-14 00:11:11,044 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2022-07-14 00:11:11,409 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 00:11:11,411 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 00:11:11,580 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-07-14 00:11:12,462 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 00:11:12,477 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 00:11:12,477 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-14 00:11:12,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 12:11:12 BoogieIcfgContainer [2022-07-14 00:11:12,480 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 00:11:12,481 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 00:11:12,482 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 00:11:12,484 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 00:11:12,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 12:11:09" (1/3) ... [2022-07-14 00:11:12,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72f01dc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 12:11:12, skipping insertion in model container [2022-07-14 00:11:12,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 12:11:10" (2/3) ... [2022-07-14 00:11:12,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72f01dc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 12:11:12, skipping insertion in model container [2022-07-14 00:11:12,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 12:11:12" (3/3) ... [2022-07-14 00:11:12,492 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 [2022-07-14 00:11:12,502 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 00:11:12,502 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-14 00:11:12,580 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 00:11:12,585 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@398e5ce4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1e53177b [2022-07-14 00:11:12,585 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-14 00:11:12,590 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) [2022-07-14 00:11:12,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-14 00:11:12,602 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 00:11:12,602 INFO L195 NwaCegarLoop]: 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] [2022-07-14 00:11:12,603 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-14 00:11:12,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 00:11:12,607 INFO L85 PathProgramCache]: Analyzing trace with hash 135613019, now seen corresponding path program 1 times [2022-07-14 00:11:12,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 00:11:12,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525239675] [2022-07-14 00:11:12,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:12,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 00:11:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:12,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 00:11:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:12,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-14 00:11:12,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:12,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 00:11:12,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:12,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-14 00:11:12,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:12,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-14 00:11:12,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:13,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-14 00:11:13,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-14 00:11:13,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 00:11:13,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525239675] [2022-07-14 00:11:13,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525239675] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 00:11:13,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 00:11:13,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 00:11:13,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54954316] [2022-07-14 00:11:13,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 00:11:13,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 00:11:13,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 00:11:13,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 00:11:13,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 00:11:13,040 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) [2022-07-14 00:11:14,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 00:11:14,623 INFO L93 Difference]: Finished difference Result 2353 states and 3522 transitions. [2022-07-14 00:11:14,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 00:11:14,625 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 [2022-07-14 00:11:14,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 00:11:14,644 INFO L225 Difference]: With dead ends: 2353 [2022-07-14 00:11:14,645 INFO L226 Difference]: Without dead ends: 1614 [2022-07-14 00:11:14,653 INFO L412 NwaCegarLoop]: 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 [2022-07-14 00:11:14,656 INFO L413 NwaCegarLoop]: 1097 mSDtfsCounter, 1883 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 953 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2018 SdHoareTripleChecker+Valid, 2350 SdHoareTripleChecker+Invalid, 1818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 953 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-14 00:11:14,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2018 Valid, 2350 Invalid, 1818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [953 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-14 00:11:14,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2022-07-14 00:11:14,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1368. [2022-07-14 00:11:14,788 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) [2022-07-14 00:11:14,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 1919 transitions. [2022-07-14 00:11:14,797 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 1919 transitions. Word has length 53 [2022-07-14 00:11:14,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 00:11:14,798 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 1919 transitions. [2022-07-14 00:11:14,798 INFO L496 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) [2022-07-14 00:11:14,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 1919 transitions. [2022-07-14 00:11:14,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-14 00:11:14,802 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 00:11:14,803 INFO L195 NwaCegarLoop]: 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] [2022-07-14 00:11:14,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-14 00:11:14,803 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-14 00:11:14,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 00:11:14,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1669594221, now seen corresponding path program 1 times [2022-07-14 00:11:14,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 00:11:14,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915413522] [2022-07-14 00:11:14,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:14,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 00:11:14,836 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 00:11:14,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835294589] [2022-07-14 00:11:14,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:14,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:11:14,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 00:11:14,839 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 00:11:14,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-14 00:11:15,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:15,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-14 00:11:15,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 00:11:15,205 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-14 00:11:15,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 00:11:15,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 00:11:15,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915413522] [2022-07-14 00:11:15,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 00:11:15,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835294589] [2022-07-14 00:11:15,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835294589] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 00:11:15,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 00:11:15,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 00:11:15,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234527285] [2022-07-14 00:11:15,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 00:11:15,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 00:11:15,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 00:11:15,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 00:11:15,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 00:11:15,208 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) [2022-07-14 00:11:15,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 00:11:15,261 INFO L93 Difference]: Finished difference Result 2722 states and 3819 transitions. [2022-07-14 00:11:15,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 00:11:15,262 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 [2022-07-14 00:11:15,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 00:11:15,268 INFO L225 Difference]: With dead ends: 2722 [2022-07-14 00:11:15,268 INFO L226 Difference]: Without dead ends: 1368 [2022-07-14 00:11:15,272 INFO L412 NwaCegarLoop]: 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 [2022-07-14 00:11:15,273 INFO L413 NwaCegarLoop]: 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 [2022-07-14 00:11:15,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [971 Valid, 992 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 00:11:15,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2022-07-14 00:11:15,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1368. [2022-07-14 00:11:15,343 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) [2022-07-14 00:11:15,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 1918 transitions. [2022-07-14 00:11:15,349 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 1918 transitions. Word has length 55 [2022-07-14 00:11:15,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 00:11:15,349 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 1918 transitions. [2022-07-14 00:11:15,349 INFO L496 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) [2022-07-14 00:11:15,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 1918 transitions. [2022-07-14 00:11:15,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-14 00:11:15,351 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 00:11:15,352 INFO L195 NwaCegarLoop]: 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] [2022-07-14 00:11:15,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-14 00:11:15,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:11:15,556 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-14 00:11:15,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 00:11:15,556 INFO L85 PathProgramCache]: Analyzing trace with hash 658476971, now seen corresponding path program 1 times [2022-07-14 00:11:15,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 00:11:15,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872106200] [2022-07-14 00:11:15,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:15,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 00:11:15,594 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 00:11:15,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657463646] [2022-07-14 00:11:15,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:15,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:11:15,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 00:11:15,596 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 00:11:15,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-14 00:11:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:15,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 00:11:15,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 00:11:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-14 00:11:15,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 00:11:15,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 00:11:15,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872106200] [2022-07-14 00:11:15,941 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 00:11:15,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657463646] [2022-07-14 00:11:15,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657463646] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 00:11:15,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 00:11:15,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 00:11:15,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608843960] [2022-07-14 00:11:15,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 00:11:15,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 00:11:15,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 00:11:15,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 00:11:15,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 00:11:15,943 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) [2022-07-14 00:11:16,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 00:11:16,064 INFO L93 Difference]: Finished difference Result 4073 states and 5792 transitions. [2022-07-14 00:11:16,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 00:11:16,065 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 [2022-07-14 00:11:16,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 00:11:16,078 INFO L225 Difference]: With dead ends: 4073 [2022-07-14 00:11:16,078 INFO L226 Difference]: Without dead ends: 2695 [2022-07-14 00:11:16,084 INFO L412 NwaCegarLoop]: 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 [2022-07-14 00:11:16,084 INFO L413 NwaCegarLoop]: 1229 mSDtfsCounter, 975 mSDsluCounter, 3456 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 4685 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 [2022-07-14 00:11:16,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [975 Valid, 4685 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 00:11:16,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2022-07-14 00:11:16,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 2687. [2022-07-14 00:11:16,167 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) [2022-07-14 00:11:16,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 3824 transitions. [2022-07-14 00:11:16,178 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 3824 transitions. Word has length 55 [2022-07-14 00:11:16,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 00:11:16,179 INFO L495 AbstractCegarLoop]: Abstraction has 2687 states and 3824 transitions. [2022-07-14 00:11:16,179 INFO L496 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) [2022-07-14 00:11:16,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 3824 transitions. [2022-07-14 00:11:16,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-14 00:11:16,184 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 00:11:16,184 INFO L195 NwaCegarLoop]: 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] [2022-07-14 00:11:16,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-14 00:11:16,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-14 00:11:16,400 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-14 00:11:16,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 00:11:16,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1631345663, now seen corresponding path program 1 times [2022-07-14 00:11:16,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 00:11:16,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326041668] [2022-07-14 00:11:16,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:16,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 00:11:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:16,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 00:11:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:16,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-14 00:11:16,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:16,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 00:11:16,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:16,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-14 00:11:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:16,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-14 00:11:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:16,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-14 00:11:16,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:16,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-14 00:11:16,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:16,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-14 00:11:16,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:16,545 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-14 00:11:16,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 00:11:16,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326041668] [2022-07-14 00:11:16,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326041668] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 00:11:16,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 00:11:16,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 00:11:16,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648108328] [2022-07-14 00:11:16,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 00:11:16,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 00:11:16,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 00:11:16,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 00:11:16,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 00:11:16,547 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) [2022-07-14 00:11:18,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 00:11:18,289 INFO L93 Difference]: Finished difference Result 8119 states and 11688 transitions. [2022-07-14 00:11:18,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 00:11:18,289 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 [2022-07-14 00:11:18,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 00:11:18,313 INFO L225 Difference]: With dead ends: 8119 [2022-07-14 00:11:18,313 INFO L226 Difference]: Without dead ends: 5446 [2022-07-14 00:11:18,321 INFO L412 NwaCegarLoop]: 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 [2022-07-14 00:11:18,322 INFO L413 NwaCegarLoop]: 1055 mSDtfsCounter, 1563 mSDsluCounter, 1442 mSDsCounter, 0 mSdLazyCounter, 1272 mSolverCounterSat, 755 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1652 SdHoareTripleChecker+Valid, 2497 SdHoareTripleChecker+Invalid, 2027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 755 IncrementalHoareTripleChecker+Valid, 1272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-14 00:11:18,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1652 Valid, 2497 Invalid, 2027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [755 Valid, 1272 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-14 00:11:18,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5446 states. [2022-07-14 00:11:18,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5446 to 4985. [2022-07-14 00:11:18,543 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) [2022-07-14 00:11:18,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4985 states to 4985 states and 7049 transitions. [2022-07-14 00:11:18,558 INFO L78 Accepts]: Start accepts. Automaton has 4985 states and 7049 transitions. Word has length 89 [2022-07-14 00:11:18,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 00:11:18,558 INFO L495 AbstractCegarLoop]: Abstraction has 4985 states and 7049 transitions. [2022-07-14 00:11:18,558 INFO L496 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) [2022-07-14 00:11:18,558 INFO L276 IsEmpty]: Start isEmpty. Operand 4985 states and 7049 transitions. [2022-07-14 00:11:18,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-14 00:11:18,564 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 00:11:18,565 INFO L195 NwaCegarLoop]: 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] [2022-07-14 00:11:18,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-14 00:11:18,565 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-14 00:11:18,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 00:11:18,566 INFO L85 PathProgramCache]: Analyzing trace with hash 570705627, now seen corresponding path program 1 times [2022-07-14 00:11:18,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 00:11:18,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623592416] [2022-07-14 00:11:18,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:18,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 00:11:18,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:18,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 00:11:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:18,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-14 00:11:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:18,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 00:11:18,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:18,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-14 00:11:18,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:18,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-14 00:11:18,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:18,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-14 00:11:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:18,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-14 00:11:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:18,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-14 00:11:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:18,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-14 00:11:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:18,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-14 00:11:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-14 00:11:18,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 00:11:18,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623592416] [2022-07-14 00:11:18,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623592416] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 00:11:18,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 00:11:18,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 00:11:18,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949597163] [2022-07-14 00:11:18,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 00:11:18,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 00:11:18,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 00:11:18,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 00:11:18,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 00:11:18,764 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) [2022-07-14 00:11:20,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 00:11:20,603 INFO L93 Difference]: Finished difference Result 14213 states and 20186 transitions. [2022-07-14 00:11:20,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 00:11:20,604 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 [2022-07-14 00:11:20,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 00:11:20,643 INFO L225 Difference]: With dead ends: 14213 [2022-07-14 00:11:20,643 INFO L226 Difference]: Without dead ends: 9242 [2022-07-14 00:11:20,659 INFO L412 NwaCegarLoop]: 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 [2022-07-14 00:11:20,661 INFO L413 NwaCegarLoop]: 1057 mSDtfsCounter, 1489 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 1249 mSolverCounterSat, 750 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1573 SdHoareTripleChecker+Valid, 2472 SdHoareTripleChecker+Invalid, 1999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 750 IncrementalHoareTripleChecker+Valid, 1249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-14 00:11:20,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1573 Valid, 2472 Invalid, 1999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [750 Valid, 1249 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-14 00:11:20,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9242 states. [2022-07-14 00:11:20,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9242 to 8517. [2022-07-14 00:11:20,975 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) [2022-07-14 00:11:20,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8517 states to 8517 states and 11909 transitions. [2022-07-14 00:11:20,999 INFO L78 Accepts]: Start accepts. Automaton has 8517 states and 11909 transitions. Word has length 104 [2022-07-14 00:11:20,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 00:11:20,999 INFO L495 AbstractCegarLoop]: Abstraction has 8517 states and 11909 transitions. [2022-07-14 00:11:21,000 INFO L496 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) [2022-07-14 00:11:21,000 INFO L276 IsEmpty]: Start isEmpty. Operand 8517 states and 11909 transitions. [2022-07-14 00:11:21,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-14 00:11:21,007 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 00:11:21,007 INFO L195 NwaCegarLoop]: 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] [2022-07-14 00:11:21,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-14 00:11:21,010 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-14 00:11:21,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 00:11:21,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1464423004, now seen corresponding path program 1 times [2022-07-14 00:11:21,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 00:11:21,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529471682] [2022-07-14 00:11:21,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:21,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 00:11:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:21,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 00:11:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:21,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-14 00:11:21,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:21,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 00:11:21,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:21,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-14 00:11:21,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:21,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-14 00:11:21,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:21,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-14 00:11:21,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:21,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-14 00:11:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:21,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-14 00:11:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:21,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-14 00:11:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:21,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-14 00:11:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:21,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-14 00:11:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:21,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-14 00:11:21,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-07-14 00:11:21,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 00:11:21,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529471682] [2022-07-14 00:11:21,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529471682] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 00:11:21,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 00:11:21,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 00:11:21,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220163696] [2022-07-14 00:11:21,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 00:11:21,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 00:11:21,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 00:11:21,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 00:11:21,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 00:11:21,176 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) [2022-07-14 00:11:22,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 00:11:22,846 INFO L93 Difference]: Finished difference Result 22537 states and 31728 transitions. [2022-07-14 00:11:22,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 00:11:22,847 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 [2022-07-14 00:11:22,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 00:11:22,930 INFO L225 Difference]: With dead ends: 22537 [2022-07-14 00:11:22,931 INFO L226 Difference]: Without dead ends: 14034 [2022-07-14 00:11:22,955 INFO L412 NwaCegarLoop]: 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 [2022-07-14 00:11:22,956 INFO L413 NwaCegarLoop]: 1331 mSDtfsCounter, 1208 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 601 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1297 SdHoareTripleChecker+Valid, 2585 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 601 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-14 00:11:22,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1297 Valid, 2585 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [601 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-14 00:11:22,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14034 states. [2022-07-14 00:11:23,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14034 to 12847. [2022-07-14 00:11:23,406 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) [2022-07-14 00:11:23,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12847 states to 12847 states and 17772 transitions. [2022-07-14 00:11:23,441 INFO L78 Accepts]: Start accepts. Automaton has 12847 states and 17772 transitions. Word has length 118 [2022-07-14 00:11:23,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 00:11:23,441 INFO L495 AbstractCegarLoop]: Abstraction has 12847 states and 17772 transitions. [2022-07-14 00:11:23,442 INFO L496 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) [2022-07-14 00:11:23,442 INFO L276 IsEmpty]: Start isEmpty. Operand 12847 states and 17772 transitions. [2022-07-14 00:11:23,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-14 00:11:23,449 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 00:11:23,449 INFO L195 NwaCegarLoop]: 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] [2022-07-14 00:11:23,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-14 00:11:23,449 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-14 00:11:23,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 00:11:23,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1872959109, now seen corresponding path program 1 times [2022-07-14 00:11:23,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 00:11:23,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835876064] [2022-07-14 00:11:23,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:23,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 00:11:23,486 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 00:11:23,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639439268] [2022-07-14 00:11:23,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:23,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:11:23,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 00:11:23,488 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 00:11:23,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-14 00:11:23,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:23,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 1176 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-14 00:11:23,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 00:11:23,825 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-14 00:11:23,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 00:11:23,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 00:11:23,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835876064] [2022-07-14 00:11:23,826 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 00:11:23,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639439268] [2022-07-14 00:11:23,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639439268] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 00:11:23,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 00:11:23,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 00:11:23,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495852247] [2022-07-14 00:11:23,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 00:11:23,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 00:11:23,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 00:11:23,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 00:11:23,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 00:11:23,828 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) [2022-07-14 00:11:24,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 00:11:24,304 INFO L93 Difference]: Finished difference Result 33105 states and 45688 transitions. [2022-07-14 00:11:24,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 00:11:24,304 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 [2022-07-14 00:11:24,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 00:11:24,436 INFO L225 Difference]: With dead ends: 33105 [2022-07-14 00:11:24,436 INFO L226 Difference]: Without dead ends: 20283 [2022-07-14 00:11:24,467 INFO L412 NwaCegarLoop]: 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 [2022-07-14 00:11:24,468 INFO L413 NwaCegarLoop]: 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 [2022-07-14 00:11:24,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [941 Valid, 2063 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 00:11:24,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20283 states. [2022-07-14 00:11:25,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20283 to 20270. [2022-07-14 00:11:25,112 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) [2022-07-14 00:11:25,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20270 states to 20270 states and 27838 transitions. [2022-07-14 00:11:25,177 INFO L78 Accepts]: Start accepts. Automaton has 20270 states and 27838 transitions. Word has length 123 [2022-07-14 00:11:25,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 00:11:25,177 INFO L495 AbstractCegarLoop]: Abstraction has 20270 states and 27838 transitions. [2022-07-14 00:11:25,178 INFO L496 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) [2022-07-14 00:11:25,178 INFO L276 IsEmpty]: Start isEmpty. Operand 20270 states and 27838 transitions. [2022-07-14 00:11:25,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-14 00:11:25,187 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 00:11:25,188 INFO L195 NwaCegarLoop]: 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] [2022-07-14 00:11:25,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-14 00:11:25,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:11:25,402 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-14 00:11:25,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 00:11:25,403 INFO L85 PathProgramCache]: Analyzing trace with hash 546342467, now seen corresponding path program 1 times [2022-07-14 00:11:25,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 00:11:25,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608867176] [2022-07-14 00:11:25,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:25,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 00:11:25,429 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 00:11:25,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857958491] [2022-07-14 00:11:25,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:25,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:11:25,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 00:11:25,431 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 00:11:25,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-14 00:11:25,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:25,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 1176 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 00:11:25,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 00:11:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-14 00:11:25,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 00:11:25,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 00:11:25,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608867176] [2022-07-14 00:11:25,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 00:11:25,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857958491] [2022-07-14 00:11:25,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857958491] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 00:11:25,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 00:11:25,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 00:11:25,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892574389] [2022-07-14 00:11:25,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 00:11:25,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 00:11:25,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 00:11:25,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 00:11:25,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 00:11:25,762 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) [2022-07-14 00:11:26,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 00:11:26,257 INFO L93 Difference]: Finished difference Result 30962 states and 42975 transitions. [2022-07-14 00:11:26,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 00:11:26,257 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 [2022-07-14 00:11:26,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 00:11:26,327 INFO L225 Difference]: With dead ends: 30962 [2022-07-14 00:11:26,327 INFO L226 Difference]: Without dead ends: 20314 [2022-07-14 00:11:26,355 INFO L412 NwaCegarLoop]: 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 [2022-07-14 00:11:26,356 INFO L413 NwaCegarLoop]: 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 [2022-07-14 00:11:26,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1990 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 00:11:26,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20314 states. [2022-07-14 00:11:26,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20314 to 20314. [2022-07-14 00:11:26,971 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) [2022-07-14 00:11:27,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20314 states to 20314 states and 27882 transitions. [2022-07-14 00:11:27,029 INFO L78 Accepts]: Start accepts. Automaton has 20314 states and 27882 transitions. Word has length 123 [2022-07-14 00:11:27,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 00:11:27,030 INFO L495 AbstractCegarLoop]: Abstraction has 20314 states and 27882 transitions. [2022-07-14 00:11:27,030 INFO L496 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) [2022-07-14 00:11:27,031 INFO L276 IsEmpty]: Start isEmpty. Operand 20314 states and 27882 transitions. [2022-07-14 00:11:27,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-14 00:11:27,040 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 00:11:27,040 INFO L195 NwaCegarLoop]: 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] [2022-07-14 00:11:27,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-14 00:11:27,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:11:27,255 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-14 00:11:27,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 00:11:27,256 INFO L85 PathProgramCache]: Analyzing trace with hash -756774844, now seen corresponding path program 1 times [2022-07-14 00:11:27,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 00:11:27,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330042043] [2022-07-14 00:11:27,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:27,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 00:11:27,282 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 00:11:27,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869882852] [2022-07-14 00:11:27,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:27,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:11:27,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 00:11:27,284 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 00:11:27,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-14 00:11:27,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:27,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 1184 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 00:11:27,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 00:11:27,603 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-14 00:11:27,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 00:11:27,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 00:11:27,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330042043] [2022-07-14 00:11:27,604 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 00:11:27,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869882852] [2022-07-14 00:11:27,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869882852] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 00:11:27,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 00:11:27,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 00:11:27,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521658876] [2022-07-14 00:11:27,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 00:11:27,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 00:11:27,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 00:11:27,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 00:11:27,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 00:11:27,605 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) [2022-07-14 00:11:28,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 00:11:28,163 INFO L93 Difference]: Finished difference Result 40681 states and 55847 transitions. [2022-07-14 00:11:28,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 00:11:28,163 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 [2022-07-14 00:11:28,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 00:11:28,233 INFO L225 Difference]: With dead ends: 40681 [2022-07-14 00:11:28,233 INFO L226 Difference]: Without dead ends: 20356 [2022-07-14 00:11:28,276 INFO L412 NwaCegarLoop]: 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 [2022-07-14 00:11:28,278 INFO L413 NwaCegarLoop]: 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 [2022-07-14 00:11:28,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2994 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 00:11:28,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20356 states. [2022-07-14 00:11:28,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20356 to 20317. [2022-07-14 00:11:28,973 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) [2022-07-14 00:11:29,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20317 states to 20317 states and 27873 transitions. [2022-07-14 00:11:29,036 INFO L78 Accepts]: Start accepts. Automaton has 20317 states and 27873 transitions. Word has length 125 [2022-07-14 00:11:29,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 00:11:29,036 INFO L495 AbstractCegarLoop]: Abstraction has 20317 states and 27873 transitions. [2022-07-14 00:11:29,037 INFO L496 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) [2022-07-14 00:11:29,037 INFO L276 IsEmpty]: Start isEmpty. Operand 20317 states and 27873 transitions. [2022-07-14 00:11:29,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-14 00:11:29,047 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 00:11:29,047 INFO L195 NwaCegarLoop]: 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] [2022-07-14 00:11:29,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-14 00:11:29,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:11:29,263 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-14 00:11:29,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 00:11:29,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1089324516, now seen corresponding path program 1 times [2022-07-14 00:11:29,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 00:11:29,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101236598] [2022-07-14 00:11:29,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:29,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 00:11:29,300 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 00:11:29,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [701443515] [2022-07-14 00:11:29,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:29,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:11:29,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 00:11:29,302 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 00:11:29,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-14 00:11:29,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:29,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 1201 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-14 00:11:29,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 00:11:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-14 00:11:29,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 00:11:29,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 00:11:29,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101236598] [2022-07-14 00:11:29,710 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 00:11:29,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701443515] [2022-07-14 00:11:29,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701443515] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 00:11:29,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 00:11:29,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 00:11:29,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923150557] [2022-07-14 00:11:29,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 00:11:29,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 00:11:29,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 00:11:29,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 00:11:29,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 00:11:29,712 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) [2022-07-14 00:11:31,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 00:11:31,908 INFO L93 Difference]: Finished difference Result 42109 states and 58238 transitions. [2022-07-14 00:11:31,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 00:11:31,908 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 [2022-07-14 00:11:31,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 00:11:31,985 INFO L225 Difference]: With dead ends: 42109 [2022-07-14 00:11:31,985 INFO L226 Difference]: Without dead ends: 21817 [2022-07-14 00:11:32,123 INFO L412 NwaCegarLoop]: 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 [2022-07-14 00:11:32,124 INFO L413 NwaCegarLoop]: 1031 mSDtfsCounter, 1283 mSDsluCounter, 1758 mSDsCounter, 0 mSdLazyCounter, 2039 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1393 SdHoareTripleChecker+Valid, 2789 SdHoareTripleChecker+Invalid, 2563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 2039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-14 00:11:32,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1393 Valid, 2789 Invalid, 2563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 2039 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-14 00:11:32,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21817 states. [2022-07-14 00:11:32,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21817 to 20019. [2022-07-14 00:11:32,648 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) [2022-07-14 00:11:32,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20019 states to 20019 states and 27137 transitions. [2022-07-14 00:11:32,705 INFO L78 Accepts]: Start accepts. Automaton has 20019 states and 27137 transitions. Word has length 126 [2022-07-14 00:11:32,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 00:11:32,706 INFO L495 AbstractCegarLoop]: Abstraction has 20019 states and 27137 transitions. [2022-07-14 00:11:32,706 INFO L496 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) [2022-07-14 00:11:32,706 INFO L276 IsEmpty]: Start isEmpty. Operand 20019 states and 27137 transitions. [2022-07-14 00:11:32,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-14 00:11:32,716 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 00:11:32,716 INFO L195 NwaCegarLoop]: 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] [2022-07-14 00:11:32,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-14 00:11:32,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:11:32,935 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-14 00:11:32,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 00:11:32,936 INFO L85 PathProgramCache]: Analyzing trace with hash 537022152, now seen corresponding path program 1 times [2022-07-14 00:11:32,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 00:11:32,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177373360] [2022-07-14 00:11:32,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:32,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 00:11:32,963 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 00:11:32,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1603792903] [2022-07-14 00:11:32,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:32,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:11:32,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 00:11:32,965 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 00:11:32,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-14 00:11:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:33,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 00:11:33,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 00:11:33,403 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-14 00:11:33,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 00:11:33,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 00:11:33,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177373360] [2022-07-14 00:11:33,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 00:11:33,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603792903] [2022-07-14 00:11:33,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603792903] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 00:11:33,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 00:11:33,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 00:11:33,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971952305] [2022-07-14 00:11:33,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 00:11:33,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 00:11:33,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 00:11:33,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 00:11:33,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 00:11:33,405 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) [2022-07-14 00:11:34,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 00:11:34,222 INFO L93 Difference]: Finished difference Result 20236 states and 27431 transitions. [2022-07-14 00:11:34,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 00:11:34,222 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 [2022-07-14 00:11:34,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 00:11:34,280 INFO L225 Difference]: With dead ends: 20236 [2022-07-14 00:11:34,280 INFO L226 Difference]: Without dead ends: 20187 [2022-07-14 00:11:34,292 INFO L412 NwaCegarLoop]: 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 [2022-07-14 00:11:34,292 INFO L413 NwaCegarLoop]: 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 [2022-07-14 00:11:34,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [945 Valid, 1685 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 00:11:34,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20187 states. [2022-07-14 00:11:34,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20187 to 20031. [2022-07-14 00:11:35,011 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) [2022-07-14 00:11:35,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20031 states to 20031 states and 27149 transitions. [2022-07-14 00:11:35,065 INFO L78 Accepts]: Start accepts. Automaton has 20031 states and 27149 transitions. Word has length 135 [2022-07-14 00:11:35,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 00:11:35,065 INFO L495 AbstractCegarLoop]: Abstraction has 20031 states and 27149 transitions. [2022-07-14 00:11:35,065 INFO L496 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) [2022-07-14 00:11:35,065 INFO L276 IsEmpty]: Start isEmpty. Operand 20031 states and 27149 transitions. [2022-07-14 00:11:35,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-07-14 00:11:35,077 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 00:11:35,077 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1] [2022-07-14 00:11:35,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-14 00:11:35,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:11:35,283 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-14 00:11:35,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 00:11:35,284 INFO L85 PathProgramCache]: Analyzing trace with hash -134402856, now seen corresponding path program 1 times [2022-07-14 00:11:35,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 00:11:35,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555168825] [2022-07-14 00:11:35,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:35,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 00:11:35,309 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 00:11:35,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435211976] [2022-07-14 00:11:35,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:35,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:11:35,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 00:11:35,311 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 00:11:35,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-14 00:11:35,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:35,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 1294 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-14 00:11:35,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 00:11:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-07-14 00:11:35,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 00:11:35,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 00:11:35,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555168825] [2022-07-14 00:11:35,679 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 00:11:35,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435211976] [2022-07-14 00:11:35,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435211976] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 00:11:35,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 00:11:35,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 00:11:35,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452417362] [2022-07-14 00:11:35,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 00:11:35,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 00:11:35,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 00:11:35,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 00:11:35,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 00:11:35,680 INFO L87 Difference]: Start difference. First operand 20031 states and 27149 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2022-07-14 00:11:36,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 00:11:36,131 INFO L93 Difference]: Finished difference Result 30016 states and 40705 transitions. [2022-07-14 00:11:36,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 00:11:36,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 137 [2022-07-14 00:11:36,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 00:11:36,153 INFO L225 Difference]: With dead ends: 30016 [2022-07-14 00:11:36,153 INFO L226 Difference]: Without dead ends: 9721 [2022-07-14 00:11:36,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 00:11:36,183 INFO L413 NwaCegarLoop]: 1039 mSDtfsCounter, 896 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 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 [2022-07-14 00:11:36,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [896 Valid, 1118 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 00:11:36,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9721 states. [2022-07-14 00:11:36,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9721 to 9721. [2022-07-14 00:11:36,430 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) [2022-07-14 00:11:36,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9721 states to 9721 states and 13152 transitions. [2022-07-14 00:11:36,456 INFO L78 Accepts]: Start accepts. Automaton has 9721 states and 13152 transitions. Word has length 137 [2022-07-14 00:11:36,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 00:11:36,456 INFO L495 AbstractCegarLoop]: Abstraction has 9721 states and 13152 transitions. [2022-07-14 00:11:36,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2022-07-14 00:11:36,456 INFO L276 IsEmpty]: Start isEmpty. Operand 9721 states and 13152 transitions. [2022-07-14 00:11:36,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-07-14 00:11:36,463 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 00:11:36,464 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1] [2022-07-14 00:11:36,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-14 00:11:36,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-14 00:11:36,685 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-14 00:11:36,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 00:11:36,686 INFO L85 PathProgramCache]: Analyzing trace with hash -472126265, now seen corresponding path program 1 times [2022-07-14 00:11:36,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 00:11:36,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403339244] [2022-07-14 00:11:36,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:36,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 00:11:36,712 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 00:11:36,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [708656635] [2022-07-14 00:11:36,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:36,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:11:36,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 00:11:36,714 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 00:11:36,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-14 00:11:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:37,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 00:11:37,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 00:11:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-14 00:11:37,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 00:11:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-14 00:11:37,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 00:11:37,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403339244] [2022-07-14 00:11:37,351 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 00:11:37,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708656635] [2022-07-14 00:11:37,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708656635] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 00:11:37,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 00:11:37,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-07-14 00:11:37,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919204574] [2022-07-14 00:11:37,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 00:11:37,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 00:11:37,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 00:11:37,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 00:11:37,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-14 00:11:37,352 INFO L87 Difference]: Start difference. First operand 9721 states and 13152 transitions. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 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) [2022-07-14 00:11:38,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 00:11:38,050 INFO L93 Difference]: Finished difference Result 10274 states and 13938 transitions. [2022-07-14 00:11:38,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 00:11:38,050 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 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 139 [2022-07-14 00:11:38,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 00:11:38,074 INFO L225 Difference]: With dead ends: 10274 [2022-07-14 00:11:38,075 INFO L226 Difference]: Without dead ends: 10225 [2022-07-14 00:11:38,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-07-14 00:11:38,080 INFO L413 NwaCegarLoop]: 983 mSDtfsCounter, 1043 mSDsluCounter, 1396 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1051 SdHoareTripleChecker+Valid, 2379 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 00:11:38,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1051 Valid, 2379 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 00:11:38,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10225 states. [2022-07-14 00:11:38,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10225 to 10225. [2022-07-14 00:11:38,346 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) [2022-07-14 00:11:38,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10225 states to 10225 states and 13854 transitions. [2022-07-14 00:11:38,369 INFO L78 Accepts]: Start accepts. Automaton has 10225 states and 13854 transitions. Word has length 139 [2022-07-14 00:11:38,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 00:11:38,370 INFO L495 AbstractCegarLoop]: Abstraction has 10225 states and 13854 transitions. [2022-07-14 00:11:38,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 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) [2022-07-14 00:11:38,370 INFO L276 IsEmpty]: Start isEmpty. Operand 10225 states and 13854 transitions. [2022-07-14 00:11:38,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-14 00:11:38,380 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 00:11:38,380 INFO L195 NwaCegarLoop]: 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, 1, 1] [2022-07-14 00:11:38,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-14 00:11:38,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-14 00:11:38,595 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-14 00:11:38,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 00:11:38,596 INFO L85 PathProgramCache]: Analyzing trace with hash -23512636, now seen corresponding path program 2 times [2022-07-14 00:11:38,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 00:11:38,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130227989] [2022-07-14 00:11:38,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:38,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 00:11:38,627 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 00:11:38,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484120215] [2022-07-14 00:11:38,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 00:11:38,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:11:38,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 00:11:38,629 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) [2022-07-14 00:11:38,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-14 00:11:38,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-14 00:11:38,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 00:11:38,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 00:11:38,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 00:11:38,905 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-07-14 00:11:38,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 00:11:38,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 00:11:38,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130227989] [2022-07-14 00:11:38,906 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 00:11:38,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484120215] [2022-07-14 00:11:38,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484120215] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 00:11:38,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 00:11:38,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 00:11:38,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133142206] [2022-07-14 00:11:38,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 00:11:38,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 00:11:38,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 00:11:38,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 00:11:38,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 00:11:38,908 INFO L87 Difference]: Start difference. First operand 10225 states and 13854 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 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) [2022-07-14 00:11:39,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 00:11:39,222 INFO L93 Difference]: Finished difference Result 20494 states and 28008 transitions. [2022-07-14 00:11:39,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 00:11:39,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 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 151 [2022-07-14 00:11:39,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 00:11:39,250 INFO L225 Difference]: With dead ends: 20494 [2022-07-14 00:11:39,250 INFO L226 Difference]: Without dead ends: 10347 [2022-07-14 00:11:39,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 00:11:39,270 INFO L413 NwaCegarLoop]: 995 mSDtfsCounter, 2 mSDsluCounter, 2970 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3965 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 00:11:39,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 3965 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 00:11:39,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10347 states. [2022-07-14 00:11:39,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10347 to 10305. [2022-07-14 00:11:39,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10305 states, 7574 states have (on average 1.3096118299445472) internal successors, (9919), 7748 states have internal predecessors, (9919), 1938 states have call successors, (1938), 737 states have call predecessors, (1938), 792 states have return successors, (2086), 1916 states have call predecessors, (2086), 1937 states have call successors, (2086) [2022-07-14 00:11:39,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10305 states to 10305 states and 13943 transitions. [2022-07-14 00:11:39,555 INFO L78 Accepts]: Start accepts. Automaton has 10305 states and 13943 transitions. Word has length 151 [2022-07-14 00:11:39,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 00:11:39,555 INFO L495 AbstractCegarLoop]: Abstraction has 10305 states and 13943 transitions. [2022-07-14 00:11:39,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 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) [2022-07-14 00:11:39,556 INFO L276 IsEmpty]: Start isEmpty. Operand 10305 states and 13943 transitions. [2022-07-14 00:11:39,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-07-14 00:11:39,565 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 00:11:39,565 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 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, 1, 1, 1, 1, 1] [2022-07-14 00:11:39,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-14 00:11:39,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-14 00:11:39,779 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-14 00:11:39,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 00:11:39,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1154172383, now seen corresponding path program 1 times [2022-07-14 00:11:39,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 00:11:39,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249014870] [2022-07-14 00:11:39,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:39,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 00:11:39,806 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 00:11:39,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1913810389] [2022-07-14 00:11:39,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:39,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:11:39,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 00:11:39,808 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) [2022-07-14 00:11:39,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-14 00:11:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:40,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 1333 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 00:11:40,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 00:11:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-14 00:11:40,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 00:11:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-14 00:11:40,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 00:11:40,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249014870] [2022-07-14 00:11:40,468 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 00:11:40,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913810389] [2022-07-14 00:11:40,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913810389] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 00:11:40,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 00:11:40,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-07-14 00:11:40,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993394564] [2022-07-14 00:11:40,468 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 00:11:40,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-14 00:11:40,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 00:11:40,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-14 00:11:40,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-07-14 00:11:40,470 INFO L87 Difference]: Start difference. First operand 10305 states and 13943 transitions. Second operand has 14 states, 14 states have (on average 12.785714285714286) internal successors, (179), 14 states have internal predecessors, (179), 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) [2022-07-14 00:11:41,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 00:11:41,488 INFO L93 Difference]: Finished difference Result 11362 states and 15467 transitions. [2022-07-14 00:11:41,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 00:11:41,489 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.785714285714286) internal successors, (179), 14 states have internal predecessors, (179), 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 153 [2022-07-14 00:11:41,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 00:11:41,516 INFO L225 Difference]: With dead ends: 11362 [2022-07-14 00:11:41,516 INFO L226 Difference]: Without dead ends: 11313 [2022-07-14 00:11:41,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-07-14 00:11:41,523 INFO L413 NwaCegarLoop]: 983 mSDtfsCounter, 1202 mSDsluCounter, 2182 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 3165 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-14 00:11:41,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1222 Valid, 3165 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-14 00:11:41,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11313 states. [2022-07-14 00:11:41,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11313 to 11313. [2022-07-14 00:11:41,914 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) [2022-07-14 00:11:41,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11313 states to 11313 states and 15347 transitions. [2022-07-14 00:11:41,940 INFO L78 Accepts]: Start accepts. Automaton has 11313 states and 15347 transitions. Word has length 153 [2022-07-14 00:11:41,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 00:11:41,941 INFO L495 AbstractCegarLoop]: Abstraction has 11313 states and 15347 transitions. [2022-07-14 00:11:41,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.785714285714286) internal successors, (179), 14 states have internal predecessors, (179), 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) [2022-07-14 00:11:41,941 INFO L276 IsEmpty]: Start isEmpty. Operand 11313 states and 15347 transitions. [2022-07-14 00:11:41,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-07-14 00:11:41,957 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 00:11:41,957 INFO L195 NwaCegarLoop]: 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] [2022-07-14 00:11:41,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-14 00:11:42,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-14 00:11:42,172 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-14 00:11:42,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 00:11:42,172 INFO L85 PathProgramCache]: Analyzing trace with hash -535217326, now seen corresponding path program 1 times [2022-07-14 00:11:42,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 00:11:42,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603237656] [2022-07-14 00:11:42,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:42,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 00:11:42,201 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 00:11:42,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811920906] [2022-07-14 00:11:42,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:42,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:11:42,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 00:11:42,203 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) [2022-07-14 00:11:42,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-14 00:11:42,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:42,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-14 00:11:42,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 00:11:42,853 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-14 00:11:42,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 00:11:43,154 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-14 00:11:43,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 00:11:43,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603237656] [2022-07-14 00:11:43,154 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 00:11:43,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811920906] [2022-07-14 00:11:43,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811920906] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 00:11:43,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 00:11:43,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2022-07-14 00:11:43,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608592069] [2022-07-14 00:11:43,154 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 00:11:43,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-14 00:11:43,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 00:11:43,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-14 00:11:43,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-07-14 00:11:43,156 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) [2022-07-14 00:11:45,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 00:11:45,255 INFO L93 Difference]: Finished difference Result 13378 states and 18347 transitions. [2022-07-14 00:11:45,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-14 00:11:45,256 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 [2022-07-14 00:11:45,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 00:11:45,288 INFO L225 Difference]: With dead ends: 13378 [2022-07-14 00:11:45,289 INFO L226 Difference]: Without dead ends: 13329 [2022-07-14 00:11:45,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-07-14 00:11:45,296 INFO L413 NwaCegarLoop]: 983 mSDtfsCounter, 2123 mSDsluCounter, 5190 mSDsCounter, 0 mSdLazyCounter, 2701 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2167 SdHoareTripleChecker+Valid, 6173 SdHoareTripleChecker+Invalid, 3300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 2701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-14 00:11:45,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2167 Valid, 6173 Invalid, 3300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 2701 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-14 00:11:45,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13329 states. [2022-07-14 00:11:45,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13329 to 13329. [2022-07-14 00:11:45,695 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) [2022-07-14 00:11:45,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13329 states to 13329 states and 18155 transitions. [2022-07-14 00:11:45,723 INFO L78 Accepts]: Start accepts. Automaton has 13329 states and 18155 transitions. Word has length 182 [2022-07-14 00:11:45,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 00:11:45,724 INFO L495 AbstractCegarLoop]: Abstraction has 13329 states and 18155 transitions. [2022-07-14 00:11:45,724 INFO L496 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) [2022-07-14 00:11:45,724 INFO L276 IsEmpty]: Start isEmpty. Operand 13329 states and 18155 transitions. [2022-07-14 00:11:45,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-07-14 00:11:45,749 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 00:11:45,749 INFO L195 NwaCegarLoop]: 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] [2022-07-14 00:11:45,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-14 00:11:45,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-14 00:11:45,956 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-14 00:11:45,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 00:11:45,956 INFO L85 PathProgramCache]: Analyzing trace with hash -999549107, now seen corresponding path program 2 times [2022-07-14 00:11:45,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 00:11:45,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304603880] [2022-07-14 00:11:45,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:45,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 00:11:46,003 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 00:11:46,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [590201432] [2022-07-14 00:11:46,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 00:11:46,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:11:46,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 00:11:46,011 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) [2022-07-14 00:11:46,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-14 00:11:46,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-14 00:11:46,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 00:11:46,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-14 00:11:46,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 00:11:46,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 1077 trivial. 0 not checked. [2022-07-14 00:11:46,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 00:11:46,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 00:11:46,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304603880] [2022-07-14 00:11:46,575 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 00:11:46,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590201432] [2022-07-14 00:11:46,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590201432] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 00:11:46,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 00:11:46,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-14 00:11:46,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799446192] [2022-07-14 00:11:46,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 00:11:46,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-14 00:11:46,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 00:11:46,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-14 00:11:46,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-07-14 00:11:46,576 INFO L87 Difference]: Start difference. First operand 13329 states and 18155 transitions. Second operand has 15 states, 14 states have (on average 6.142857142857143) internal successors, (86), 11 states have internal predecessors, (86), 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) [2022-07-14 00:11:47,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 00:11:47,160 INFO L93 Difference]: Finished difference Result 26858 states and 36750 transitions. [2022-07-14 00:11:47,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 00:11:47,161 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 6.142857142857143) internal successors, (86), 11 states have internal predecessors, (86), 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 225 [2022-07-14 00:11:47,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 00:11:47,201 INFO L225 Difference]: With dead ends: 26858 [2022-07-14 00:11:47,201 INFO L226 Difference]: Without dead ends: 13607 [2022-07-14 00:11:47,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-07-14 00:11:47,229 INFO L413 NwaCegarLoop]: 1019 mSDtfsCounter, 22 mSDsluCounter, 12132 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 13151 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 00:11:47,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 13151 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 00:11:47,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13607 states. [2022-07-14 00:11:47,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13607 to 13441. [2022-07-14 00:11:47,620 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) [2022-07-14 00:11:47,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13441 states to 13441 states and 18263 transitions. [2022-07-14 00:11:47,650 INFO L78 Accepts]: Start accepts. Automaton has 13441 states and 18263 transitions. Word has length 225 [2022-07-14 00:11:47,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 00:11:47,651 INFO L495 AbstractCegarLoop]: Abstraction has 13441 states and 18263 transitions. [2022-07-14 00:11:47,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 6.142857142857143) internal successors, (86), 11 states have internal predecessors, (86), 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) [2022-07-14 00:11:47,651 INFO L276 IsEmpty]: Start isEmpty. Operand 13441 states and 18263 transitions. [2022-07-14 00:11:47,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-07-14 00:11:47,677 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 00:11:47,677 INFO L195 NwaCegarLoop]: 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] [2022-07-14 00:11:47,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-14 00:11:47,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-14 00:11:47,885 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-14 00:11:47,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 00:11:47,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1281005638, now seen corresponding path program 2 times [2022-07-14 00:11:47,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 00:11:47,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965861828] [2022-07-14 00:11:47,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:47,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 00:11:47,910 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 00:11:47,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1397114004] [2022-07-14 00:11:47,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 00:11:47,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:11:47,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 00:11:47,912 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) [2022-07-14 00:11:47,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-14 00:11:48,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-14 00:11:48,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 00:11:48,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-14 00:11:48,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 00:11:48,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 1077 trivial. 0 not checked. [2022-07-14 00:11:48,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 00:11:48,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 00:11:48,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965861828] [2022-07-14 00:11:48,378 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 00:11:48,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397114004] [2022-07-14 00:11:48,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397114004] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 00:11:48,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 00:11:48,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-14 00:11:48,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660886887] [2022-07-14 00:11:48,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 00:11:48,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-14 00:11:48,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 00:11:48,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-14 00:11:48,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-07-14 00:11:48,379 INFO L87 Difference]: Start difference. First operand 13441 states and 18263 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) [2022-07-14 00:11:48,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 00:11:48,912 INFO L93 Difference]: Finished difference Result 27002 states and 36750 transitions. [2022-07-14 00:11:48,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 00:11:48,912 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 [2022-07-14 00:11:48,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 00:11:48,946 INFO L225 Difference]: With dead ends: 27002 [2022-07-14 00:11:48,946 INFO L226 Difference]: Without dead ends: 13639 [2022-07-14 00:11:48,972 INFO L412 NwaCegarLoop]: 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 [2022-07-14 00:11:48,973 INFO L413 NwaCegarLoop]: 1018 mSDtfsCounter, 22 mSDsluCounter, 12120 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 13138 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 00:11:48,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 13138 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 00:11:48,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13639 states. [2022-07-14 00:11:49,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13639 to 13473. [2022-07-14 00:11:49,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13473 states, 9954 states have (on average 1.2753666867590918) internal successors, (12695), 10220 states have internal predecessors, (12695), 2694 states have call successors, (2694), 737 states have call predecessors, (2694), 824 states have return successors, (2898), 2612 states have call predecessors, (2898), 2693 states have call successors, (2898) [2022-07-14 00:11:49,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13473 states to 13473 states and 18287 transitions. [2022-07-14 00:11:49,391 INFO L78 Accepts]: Start accepts. Automaton has 13473 states and 18287 transitions. Word has length 230 [2022-07-14 00:11:49,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 00:11:49,391 INFO L495 AbstractCegarLoop]: Abstraction has 13473 states and 18287 transitions. [2022-07-14 00:11:49,391 INFO L496 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) [2022-07-14 00:11:49,391 INFO L276 IsEmpty]: Start isEmpty. Operand 13473 states and 18287 transitions. [2022-07-14 00:11:49,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-07-14 00:11:49,419 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 00:11:49,419 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 9, 9, 8, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 00:11:49,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-14 00:11:49,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:11:49,626 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-14 00:11:49,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 00:11:49,627 INFO L85 PathProgramCache]: Analyzing trace with hash 898829726, now seen corresponding path program 1 times [2022-07-14 00:11:49,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 00:11:49,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689508893] [2022-07-14 00:11:49,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:49,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 00:11:49,661 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 00:11:49,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [994907259] [2022-07-14 00:11:49,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:49,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:11:49,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 00:11:49,662 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) [2022-07-14 00:11:49,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-14 00:11:50,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:50,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-14 00:11:50,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 00:11:50,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 1032 trivial. 0 not checked. [2022-07-14 00:11:50,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 00:11:50,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 00:11:50,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689508893] [2022-07-14 00:11:50,051 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 00:11:50,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994907259] [2022-07-14 00:11:50,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994907259] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 00:11:50,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 00:11:50,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 00:11:50,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708619095] [2022-07-14 00:11:50,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 00:11:50,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 00:11:50,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 00:11:50,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 00:11:50,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 00:11:50,053 INFO L87 Difference]: Start difference. First operand 13473 states and 18287 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-07-14 00:11:50,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 00:11:50,622 INFO L93 Difference]: Finished difference Result 33000 states and 44681 transitions. [2022-07-14 00:11:50,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 00:11:50,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 248 [2022-07-14 00:11:50,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 00:11:50,662 INFO L225 Difference]: With dead ends: 33000 [2022-07-14 00:11:50,663 INFO L226 Difference]: Without dead ends: 19605 [2022-07-14 00:11:50,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 00:11:50,684 INFO L413 NwaCegarLoop]: 1250 mSDtfsCounter, 828 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 2078 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 00:11:50,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [828 Valid, 2078 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 00:11:50,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19605 states. [2022-07-14 00:11:51,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19605 to 19592. [2022-07-14 00:11:51,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19592 states, 14505 states have (on average 1.271699413995174) internal successors, (18446), 14885 states have internal predecessors, (18446), 3844 states have call successors, (3844), 1115 states have call predecessors, (3844), 1242 states have return successors, (4130), 3726 states have call predecessors, (4130), 3843 states have call successors, (4130) [2022-07-14 00:11:51,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19592 states to 19592 states and 26420 transitions. [2022-07-14 00:11:51,292 INFO L78 Accepts]: Start accepts. Automaton has 19592 states and 26420 transitions. Word has length 248 [2022-07-14 00:11:51,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 00:11:51,293 INFO L495 AbstractCegarLoop]: Abstraction has 19592 states and 26420 transitions. [2022-07-14 00:11:51,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-07-14 00:11:51,293 INFO L276 IsEmpty]: Start isEmpty. Operand 19592 states and 26420 transitions. [2022-07-14 00:11:51,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-07-14 00:11:51,328 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 00:11:51,328 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 9, 9, 8, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 00:11:51,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-14 00:11:51,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:11:51,531 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-14 00:11:51,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 00:11:51,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1092480309, now seen corresponding path program 1 times [2022-07-14 00:11:51,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 00:11:51,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008528957] [2022-07-14 00:11:51,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:51,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 00:11:51,573 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 00:11:51,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840809729] [2022-07-14 00:11:51,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:51,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:11:51,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 00:11:51,575 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 00:11:51,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-14 00:11:51,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:51,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 1715 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 00:11:51,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 00:11:51,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1109 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 1064 trivial. 0 not checked. [2022-07-14 00:11:51,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 00:11:51,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 00:11:51,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008528957] [2022-07-14 00:11:51,978 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 00:11:51,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840809729] [2022-07-14 00:11:51,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840809729] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 00:11:51,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 00:11:51,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 00:11:51,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233969674] [2022-07-14 00:11:51,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 00:11:51,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 00:11:51,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 00:11:51,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 00:11:51,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 00:11:51,981 INFO L87 Difference]: Start difference. First operand 19592 states and 26420 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-07-14 00:11:52,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 00:11:52,942 INFO L93 Difference]: Finished difference Result 51112 states and 68818 transitions. [2022-07-14 00:11:52,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 00:11:52,943 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 261 [2022-07-14 00:11:52,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 00:11:53,024 INFO L225 Difference]: With dead ends: 51112 [2022-07-14 00:11:53,024 INFO L226 Difference]: Without dead ends: 31598 [2022-07-14 00:11:53,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 00:11:53,066 INFO L413 NwaCegarLoop]: 1728 mSDtfsCounter, 983 mSDsluCounter, 2497 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 4225 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 00:11:53,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 4225 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 00:11:53,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31598 states. [2022-07-14 00:11:54,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31598 to 28788. [2022-07-14 00:11:54,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28788 states, 21253 states have (on average 1.2667388133439985) internal successors, (26922), 21809 states have internal predecessors, (26922), 5656 states have call successors, (5656), 1671 states have call predecessors, (5656), 1878 states have return successors, (6114), 5506 states have call predecessors, (6114), 5655 states have call successors, (6114) [2022-07-14 00:11:54,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28788 states to 28788 states and 38692 transitions. [2022-07-14 00:11:54,244 INFO L78 Accepts]: Start accepts. Automaton has 28788 states and 38692 transitions. Word has length 261 [2022-07-14 00:11:54,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 00:11:54,244 INFO L495 AbstractCegarLoop]: Abstraction has 28788 states and 38692 transitions. [2022-07-14 00:11:54,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-07-14 00:11:54,245 INFO L276 IsEmpty]: Start isEmpty. Operand 28788 states and 38692 transitions. [2022-07-14 00:11:54,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-07-14 00:11:54,305 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 00:11:54,306 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 00:11:54,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-14 00:11:54,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:11:54,506 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-14 00:11:54,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 00:11:54,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1726691036, now seen corresponding path program 1 times [2022-07-14 00:11:54,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 00:11:54,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925737148] [2022-07-14 00:11:54,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:54,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 00:11:54,533 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 00:11:54,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2038773462] [2022-07-14 00:11:54,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:11:54,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:11:54,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 00:11:54,535 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 00:11:54,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-14 00:11:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:11:54,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 1731 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 00:11:54,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 00:11:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 68 proven. 12 refuted. 0 times theorem prover too weak. 1021 trivial. 0 not checked. [2022-07-14 00:11:55,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 00:11:55,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1093 trivial. 0 not checked. [2022-07-14 00:11:55,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 00:11:55,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925737148] [2022-07-14 00:11:55,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 00:11:55,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038773462] [2022-07-14 00:11:55,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038773462] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-14 00:11:55,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 00:11:55,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 14 [2022-07-14 00:11:55,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625698886] [2022-07-14 00:11:55,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 00:11:55,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 00:11:55,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 00:11:55,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 00:11:55,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-07-14 00:11:55,528 INFO L87 Difference]: Start difference. First operand 28788 states and 38692 transitions. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 6 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2022-07-14 00:12:02,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 00:12:02,392 INFO L93 Difference]: Finished difference Result 104556 states and 147739 transitions. [2022-07-14 00:12:02,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 00:12:02,393 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 6 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) Word has length 253 [2022-07-14 00:12:02,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 00:12:02,695 INFO L225 Difference]: With dead ends: 104556 [2022-07-14 00:12:02,695 INFO L226 Difference]: Without dead ends: 85419 [2022-07-14 00:12:02,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 491 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2022-07-14 00:12:02,767 INFO L413 NwaCegarLoop]: 1846 mSDtfsCounter, 5325 mSDsluCounter, 3434 mSDsCounter, 0 mSdLazyCounter, 3703 mSolverCounterSat, 2248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5476 SdHoareTripleChecker+Valid, 5280 SdHoareTripleChecker+Invalid, 5951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2248 IncrementalHoareTripleChecker+Valid, 3703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-14 00:12:02,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5476 Valid, 5280 Invalid, 5951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2248 Valid, 3703 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-14 00:12:02,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85419 states. [2022-07-14 00:12:05,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85419 to 48089. [2022-07-14 00:12:05,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48089 states, 35412 states have (on average 1.2549700666440755) internal successors, (44441), 36448 states have internal predecessors, (44441), 9508 states have call successors, (9508), 2507 states have call predecessors, (9508), 3168 states have return successors, (11570), 9450 states have call predecessors, (11570), 9507 states have call successors, (11570) [2022-07-14 00:12:05,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48089 states to 48089 states and 65519 transitions. [2022-07-14 00:12:05,871 INFO L78 Accepts]: Start accepts. Automaton has 48089 states and 65519 transitions. Word has length 253 [2022-07-14 00:12:05,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 00:12:05,871 INFO L495 AbstractCegarLoop]: Abstraction has 48089 states and 65519 transitions. [2022-07-14 00:12:05,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 6 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2022-07-14 00:12:05,872 INFO L276 IsEmpty]: Start isEmpty. Operand 48089 states and 65519 transitions. [2022-07-14 00:12:06,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-07-14 00:12:06,013 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 00:12:06,013 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 9, 9, 8, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 00:12:06,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-14 00:12:06,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:12:06,227 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-14 00:12:06,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 00:12:06,228 INFO L85 PathProgramCache]: Analyzing trace with hash 972017135, now seen corresponding path program 1 times [2022-07-14 00:12:06,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 00:12:06,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139245590] [2022-07-14 00:12:06,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:12:06,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 00:12:06,256 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 00:12:06,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609764859] [2022-07-14 00:12:06,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:12:06,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:12:06,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 00:12:06,258 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 00:12:06,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-14 00:12:06,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:12:06,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 1717 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-14 00:12:06,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 00:12:06,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1109 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 1064 trivial. 0 not checked. [2022-07-14 00:12:06,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 00:12:06,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 00:12:06,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139245590] [2022-07-14 00:12:06,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 00:12:06,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609764859] [2022-07-14 00:12:06,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609764859] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 00:12:06,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 00:12:06,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 00:12:06,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304303814] [2022-07-14 00:12:06,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 00:12:06,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 00:12:06,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 00:12:06,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 00:12:06,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 00:12:06,778 INFO L87 Difference]: Start difference. First operand 48089 states and 65519 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-07-14 00:12:08,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 00:12:08,861 INFO L93 Difference]: Finished difference Result 96130 states and 131000 transitions. [2022-07-14 00:12:08,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 00:12:08,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 263 [2022-07-14 00:12:08,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 00:12:09,005 INFO L225 Difference]: With dead ends: 96130 [2022-07-14 00:12:09,005 INFO L226 Difference]: Without dead ends: 48119 [2022-07-14 00:12:09,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 00:12:09,098 INFO L413 NwaCegarLoop]: 996 mSDtfsCounter, 0 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1987 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 00:12:09,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1987 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 00:12:09,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48119 states. [2022-07-14 00:12:11,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48119 to 48119. [2022-07-14 00:12:11,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48119 states, 35442 states have (on average 1.2547542463743582) internal successors, (44471), 36478 states have internal predecessors, (44471), 9508 states have call successors, (9508), 2507 states have call predecessors, (9508), 3168 states have return successors, (11570), 9450 states have call predecessors, (11570), 9507 states have call successors, (11570) [2022-07-14 00:12:11,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48119 states to 48119 states and 65549 transitions. [2022-07-14 00:12:11,935 INFO L78 Accepts]: Start accepts. Automaton has 48119 states and 65549 transitions. Word has length 263 [2022-07-14 00:12:11,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 00:12:11,935 INFO L495 AbstractCegarLoop]: Abstraction has 48119 states and 65549 transitions. [2022-07-14 00:12:11,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-07-14 00:12:11,935 INFO L276 IsEmpty]: Start isEmpty. Operand 48119 states and 65549 transitions. [2022-07-14 00:12:12,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-07-14 00:12:12,045 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 00:12:12,046 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 9, 9, 8, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 00:12:12,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-14 00:12:12,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:12:12,247 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-14 00:12:12,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 00:12:12,247 INFO L85 PathProgramCache]: Analyzing trace with hash -785610003, now seen corresponding path program 1 times [2022-07-14 00:12:12,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 00:12:12,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705433811] [2022-07-14 00:12:12,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:12:12,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 00:12:12,274 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 00:12:12,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371508450] [2022-07-14 00:12:12,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:12:12,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:12:12,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 00:12:12,284 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 00:12:12,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-14 00:12:12,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:12:12,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 1720 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 00:12:12,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 00:12:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1109 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 1064 trivial. 0 not checked. [2022-07-14 00:12:12,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 00:12:12,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 00:12:12,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705433811] [2022-07-14 00:12:12,699 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 00:12:12,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371508450] [2022-07-14 00:12:12,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371508450] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 00:12:12,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 00:12:12,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 00:12:12,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728556619] [2022-07-14 00:12:12,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 00:12:12,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 00:12:12,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 00:12:12,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 00:12:12,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 00:12:12,702 INFO L87 Difference]: Start difference. First operand 48119 states and 65549 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-07-14 00:12:16,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 00:12:16,375 INFO L93 Difference]: Finished difference Result 115958 states and 157846 transitions. [2022-07-14 00:12:16,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 00:12:16,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 263 [2022-07-14 00:12:16,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 00:12:16,589 INFO L225 Difference]: With dead ends: 115958 [2022-07-14 00:12:16,589 INFO L226 Difference]: Without dead ends: 67917 [2022-07-14 00:12:16,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 00:12:16,687 INFO L413 NwaCegarLoop]: 1492 mSDtfsCounter, 983 mSDsluCounter, 2369 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 3861 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 00:12:16,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 3861 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 00:12:16,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67917 states. [2022-07-14 00:12:19,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67917 to 48119. [2022-07-14 00:12:19,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48119 states, 35442 states have (on average 1.2547542463743582) internal successors, (44471), 36478 states have internal predecessors, (44471), 9508 states have call successors, (9508), 2507 states have call predecessors, (9508), 3168 states have return successors, (11570), 9450 states have call predecessors, (11570), 9507 states have call successors, (11570) [2022-07-14 00:12:20,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48119 states to 48119 states and 65549 transitions. [2022-07-14 00:12:20,040 INFO L78 Accepts]: Start accepts. Automaton has 48119 states and 65549 transitions. Word has length 263 [2022-07-14 00:12:20,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 00:12:20,041 INFO L495 AbstractCegarLoop]: Abstraction has 48119 states and 65549 transitions. [2022-07-14 00:12:20,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-07-14 00:12:20,041 INFO L276 IsEmpty]: Start isEmpty. Operand 48119 states and 65549 transitions. [2022-07-14 00:12:20,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-07-14 00:12:20,154 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 00:12:20,154 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 00:12:20,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-14 00:12:20,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:12:20,355 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-14 00:12:20,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 00:12:20,356 INFO L85 PathProgramCache]: Analyzing trace with hash 123373321, now seen corresponding path program 1 times [2022-07-14 00:12:20,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 00:12:20,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235255674] [2022-07-14 00:12:20,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:12:20,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 00:12:20,394 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 00:12:20,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709266972] [2022-07-14 00:12:20,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 00:12:20,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 00:12:20,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 00:12:20,396 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 00:12:20,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-14 00:12:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 00:12:20,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 1733 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 00:12:20,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 00:12:20,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1093 trivial. 0 not checked. [2022-07-14 00:12:20,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 00:12:20,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 00:12:20,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235255674] [2022-07-14 00:12:20,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 00:12:20,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709266972] [2022-07-14 00:12:20,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709266972] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 00:12:20,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 00:12:20,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 00:12:20,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397457638] [2022-07-14 00:12:20,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 00:12:20,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 00:12:20,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 00:12:20,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 00:12:20,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 00:12:20,820 INFO L87 Difference]: Start difference. First operand 48119 states and 65549 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19)