./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pt.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pt.ko-main.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 3b154baf348652a9aadd484f41053a90df6581eb3d7346fd488d4cc05040e74b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 16:03:26,925 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 16:03:26,928 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 16:03:26,978 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 16:03:26,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 16:03:26,981 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 16:03:26,982 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 16:03:26,985 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 16:03:26,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 16:03:26,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 16:03:26,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 16:03:26,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 16:03:26,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 16:03:26,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 16:03:26,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 16:03:26,999 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 16:03:27,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 16:03:27,001 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 16:03:27,003 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 16:03:27,009 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 16:03:27,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 16:03:27,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 16:03:27,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 16:03:27,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 16:03:27,020 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 16:03:27,020 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 16:03:27,020 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 16:03:27,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 16:03:27,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 16:03:27,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 16:03:27,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 16:03:27,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 16:03:27,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 16:03:27,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 16:03:27,028 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 16:03:27,028 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 16:03:27,028 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 16:03:27,028 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 16:03:27,029 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 16:03:27,029 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 16:03:27,030 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 16:03:27,031 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-21 16:03:27,062 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 16:03:27,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 16:03:27,063 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 16:03:27,063 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 16:03:27,064 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 16:03:27,064 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 16:03:27,065 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 16:03:27,065 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 16:03:27,065 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 16:03:27,065 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 16:03:27,066 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 16:03:27,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 16:03:27,067 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 16:03:27,067 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 16:03:27,067 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 16:03:27,067 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 16:03:27,067 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 16:03:27,067 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 16:03:27,068 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 16:03:27,068 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 16:03:27,068 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 16:03:27,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:03:27,068 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 16:03:27,068 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 16:03:27,069 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 16:03:27,069 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 16:03:27,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 16:03:27,070 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 16:03:27,071 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 16:03:27,071 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 16:03:27,071 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 16:03:27,071 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3b154baf348652a9aadd484f41053a90df6581eb3d7346fd488d4cc05040e74b [2021-12-21 16:03:27,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 16:03:27,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 16:03:27,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 16:03:27,321 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 16:03:27,323 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 16:03:27,324 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pt.ko-main.cil.out.i [2021-12-21 16:03:27,375 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6b88f20c/05fb21c89ad14fbc8e8cfc82dfa0dfe6/FLAG7eb5c1b0d [2021-12-21 16:03:27,935 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 16:03:27,935 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pt.ko-main.cil.out.i [2021-12-21 16:03:27,978 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6b88f20c/05fb21c89ad14fbc8e8cfc82dfa0dfe6/FLAG7eb5c1b0d [2021-12-21 16:03:28,402 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6b88f20c/05fb21c89ad14fbc8e8cfc82dfa0dfe6 [2021-12-21 16:03:28,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 16:03:28,407 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 16:03:28,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 16:03:28,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 16:03:28,412 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 16:03:28,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:03:28" (1/1) ... [2021-12-21 16:03:28,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16694adc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:03:28, skipping insertion in model container [2021-12-21 16:03:28,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:03:28" (1/1) ... [2021-12-21 16:03:28,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 16:03:28,482 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 16:03:29,239 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-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pt.ko-main.cil.out.i[119285,119298] [2021-12-21 16:03:29,310 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:03:29,337 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 16:03:29,459 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-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pt.ko-main.cil.out.i[119285,119298] [2021-12-21 16:03:29,481 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:03:29,532 INFO L208 MainTranslator]: Completed translation [2021-12-21 16:03:29,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:03:29 WrapperNode [2021-12-21 16:03:29,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 16:03:29,535 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 16:03:29,535 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 16:03:29,536 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 16:03:29,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:03:29" (1/1) ... [2021-12-21 16:03:29,581 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:03:29" (1/1) ... [2021-12-21 16:03:29,653 INFO L137 Inliner]: procedures = 144, calls = 800, calls flagged for inlining = 49, calls inlined = 41, statements flattened = 1426 [2021-12-21 16:03:29,654 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 16:03:29,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 16:03:29,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 16:03:29,655 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 16:03:29,662 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:03:29" (1/1) ... [2021-12-21 16:03:29,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:03:29" (1/1) ... [2021-12-21 16:03:29,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:03:29" (1/1) ... [2021-12-21 16:03:29,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:03:29" (1/1) ... [2021-12-21 16:03:29,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:03:29" (1/1) ... [2021-12-21 16:03:29,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:03:29" (1/1) ... [2021-12-21 16:03:29,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:03:29" (1/1) ... [2021-12-21 16:03:29,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 16:03:29,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 16:03:29,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 16:03:29,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 16:03:29,808 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:03:29" (1/1) ... [2021-12-21 16:03:29,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:03:29,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:03:29,836 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 16:03:29,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 16:03:29,876 INFO L130 BoogieDeclarations]: Found specification of procedure pi_release [2021-12-21 16:03:29,877 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_release [2021-12-21 16:03:29,877 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2021-12-21 16:03:29,877 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2021-12-21 16:03:29,877 INFO L130 BoogieDeclarations]: Found specification of procedure pi_disconnect [2021-12-21 16:03:29,877 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_disconnect [2021-12-21 16:03:29,877 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_pt_mutex [2021-12-21 16:03:29,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_pt_mutex [2021-12-21 16:03:29,878 INFO L130 BoogieDeclarations]: Found specification of procedure status_reg [2021-12-21 16:03:29,878 INFO L138 BoogieDeclarations]: Found implementation of procedure status_reg [2021-12-21 16:03:29,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 16:03:29,878 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_block [2021-12-21 16:03:29,878 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_block [2021-12-21 16:03:29,878 INFO L130 BoogieDeclarations]: Found specification of procedure read_reg [2021-12-21 16:03:29,879 INFO L138 BoogieDeclarations]: Found implementation of procedure read_reg [2021-12-21 16:03:29,879 INFO L130 BoogieDeclarations]: Found specification of procedure pt_media_access_cmd [2021-12-21 16:03:29,879 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_media_access_cmd [2021-12-21 16:03:29,879 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-21 16:03:29,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-21 16:03:29,879 INFO L130 BoogieDeclarations]: Found specification of procedure pt_reset [2021-12-21 16:03:29,879 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_reset [2021-12-21 16:03:29,880 INFO L130 BoogieDeclarations]: Found specification of procedure pt_identify [2021-12-21 16:03:29,880 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_identify [2021-12-21 16:03:29,880 INFO L130 BoogieDeclarations]: Found specification of procedure pt_command [2021-12-21 16:03:29,880 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_command [2021-12-21 16:03:29,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 16:03:29,880 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-12-21 16:03:29,880 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-12-21 16:03:29,881 INFO L130 BoogieDeclarations]: Found specification of procedure pt_write [2021-12-21 16:03:29,881 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_write [2021-12-21 16:03:29,881 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-21 16:03:29,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-21 16:03:29,881 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-21 16:03:29,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-21 16:03:29,881 INFO L130 BoogieDeclarations]: Found specification of procedure pt_atapi [2021-12-21 16:03:29,882 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_atapi [2021-12-21 16:03:29,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 16:03:29,882 INFO L130 BoogieDeclarations]: Found specification of procedure pt_poll_dsc [2021-12-21 16:03:29,882 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_poll_dsc [2021-12-21 16:03:29,882 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_pt_mutex [2021-12-21 16:03:29,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_pt_mutex [2021-12-21 16:03:29,882 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-12-21 16:03:29,882 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-12-21 16:03:29,883 INFO L130 BoogieDeclarations]: Found specification of procedure pt_req_sense [2021-12-21 16:03:29,883 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_req_sense [2021-12-21 16:03:29,883 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-12-21 16:03:29,883 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-12-21 16:03:29,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 16:03:29,883 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_17 [2021-12-21 16:03:29,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_17 [2021-12-21 16:03:29,884 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2021-12-21 16:03:29,884 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2021-12-21 16:03:29,884 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-12-21 16:03:29,884 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-12-21 16:03:29,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 16:03:29,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 16:03:29,885 INFO L130 BoogieDeclarations]: Found specification of procedure DRIVE [2021-12-21 16:03:29,886 INFO L138 BoogieDeclarations]: Found implementation of procedure DRIVE [2021-12-21 16:03:29,886 INFO L130 BoogieDeclarations]: Found specification of procedure pt_completion [2021-12-21 16:03:29,887 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_completion [2021-12-21 16:03:29,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 16:03:29,887 INFO L130 BoogieDeclarations]: Found specification of procedure pt_sleep [2021-12-21 16:03:29,887 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_sleep [2021-12-21 16:03:29,887 INFO L130 BoogieDeclarations]: Found specification of procedure pt_write_fm [2021-12-21 16:03:29,888 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_write_fm [2021-12-21 16:03:29,888 INFO L130 BoogieDeclarations]: Found specification of procedure iminor [2021-12-21 16:03:29,888 INFO L138 BoogieDeclarations]: Found implementation of procedure iminor [2021-12-21 16:03:29,888 INFO L130 BoogieDeclarations]: Found specification of procedure pi_write_block [2021-12-21 16:03:29,888 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_write_block [2021-12-21 16:03:29,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 16:03:29,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 16:03:29,889 INFO L130 BoogieDeclarations]: Found specification of procedure pi_init [2021-12-21 16:03:29,889 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_init [2021-12-21 16:03:29,889 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_regr [2021-12-21 16:03:29,889 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_regr [2021-12-21 16:03:29,889 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-12-21 16:03:29,889 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-12-21 16:03:29,890 INFO L130 BoogieDeclarations]: Found specification of procedure pt_wait [2021-12-21 16:03:29,890 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_wait [2021-12-21 16:03:29,890 INFO L130 BoogieDeclarations]: Found specification of procedure pi_connect [2021-12-21 16:03:29,890 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_connect [2021-12-21 16:03:29,890 INFO L130 BoogieDeclarations]: Found specification of procedure device_destroy [2021-12-21 16:03:29,890 INFO L138 BoogieDeclarations]: Found implementation of procedure device_destroy [2021-12-21 16:03:29,891 INFO L130 BoogieDeclarations]: Found specification of procedure pt_probe [2021-12-21 16:03:29,891 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_probe [2021-12-21 16:03:29,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 16:03:29,891 INFO L130 BoogieDeclarations]: Found specification of procedure pt_rewind [2021-12-21 16:03:29,891 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_rewind [2021-12-21 16:03:29,892 INFO L130 BoogieDeclarations]: Found specification of procedure xn [2021-12-21 16:03:29,892 INFO L138 BoogieDeclarations]: Found implementation of procedure xn [2021-12-21 16:03:29,892 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-12-21 16:03:29,892 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-12-21 16:03:29,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 16:03:29,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 16:03:29,893 INFO L130 BoogieDeclarations]: Found specification of procedure xs [2021-12-21 16:03:29,893 INFO L138 BoogieDeclarations]: Found implementation of procedure xs [2021-12-21 16:03:30,284 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 16:03:30,286 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 16:03:36,022 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 16:03:36,032 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 16:03:36,033 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-21 16:03:36,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:03:36 BoogieIcfgContainer [2021-12-21 16:03:36,035 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 16:03:36,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 16:03:36,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 16:03:36,039 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 16:03:36,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 04:03:28" (1/3) ... [2021-12-21 16:03:36,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7288480c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:03:36, skipping insertion in model container [2021-12-21 16:03:36,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:03:29" (2/3) ... [2021-12-21 16:03:36,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7288480c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:03:36, skipping insertion in model container [2021-12-21 16:03:36,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:03:36" (3/3) ... [2021-12-21 16:03:36,042 INFO L111 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pt.ko-main.cil.out.i [2021-12-21 16:03:36,046 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 16:03:36,046 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 16:03:36,087 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 16:03:36,092 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 16:03:36,093 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 16:03:36,150 INFO L276 IsEmpty]: Start isEmpty. Operand has 674 states, 467 states have (on average 1.3533190578158458) internal successors, (632), 489 states have internal predecessors, (632), 167 states have call successors, (167), 42 states have call predecessors, (167), 42 states have return successors, (167), 167 states have call predecessors, (167), 167 states have call successors, (167) [2021-12-21 16:03:36,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-21 16:03:36,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:03:36,165 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:03:36,166 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:03:36,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:03:36,171 INFO L85 PathProgramCache]: Analyzing trace with hash 334168328, now seen corresponding path program 1 times [2021-12-21 16:03:36,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:03:36,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520065661] [2021-12-21 16:03:36,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:03:36,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:03:36,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:36,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 16:03:36,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 16:03:36,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:03:36,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520065661] [2021-12-21 16:03:36,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520065661] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:03:36,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:03:36,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 16:03:36,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753547133] [2021-12-21 16:03:36,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:03:36,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 16:03:36,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:03:36,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 16:03:36,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:03:36,676 INFO L87 Difference]: Start difference. First operand has 674 states, 467 states have (on average 1.3533190578158458) internal successors, (632), 489 states have internal predecessors, (632), 167 states have call successors, (167), 42 states have call predecessors, (167), 42 states have return successors, (167), 167 states have call predecessors, (167), 167 states have call successors, (167) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 16:03:37,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:03:37,134 INFO L93 Difference]: Finished difference Result 1645 states and 2392 transitions. [2021-12-21 16:03:37,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 16:03:37,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-12-21 16:03:37,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:03:37,157 INFO L225 Difference]: With dead ends: 1645 [2021-12-21 16:03:37,157 INFO L226 Difference]: Without dead ends: 966 [2021-12-21 16:03:37,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:03:37,171 INFO L933 BasicCegarLoop]: 1197 mSDtfsCounter, 439 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 2091 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 16:03:37,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 2091 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 16:03:37,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-12-21 16:03:37,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 938. [2021-12-21 16:03:37,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 645 states have (on average 1.3472868217054264) internal successors, (869), 667 states have internal predecessors, (869), 228 states have call successors, (228), 65 states have call predecessors, (228), 64 states have return successors, (222), 222 states have call predecessors, (222), 222 states have call successors, (222) [2021-12-21 16:03:37,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1319 transitions. [2021-12-21 16:03:37,308 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1319 transitions. Word has length 19 [2021-12-21 16:03:37,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:03:37,309 INFO L470 AbstractCegarLoop]: Abstraction has 938 states and 1319 transitions. [2021-12-21 16:03:37,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 16:03:37,309 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1319 transitions. [2021-12-21 16:03:37,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-21 16:03:37,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:03:37,311 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:03:37,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 16:03:37,312 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:03:37,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:03:37,312 INFO L85 PathProgramCache]: Analyzing trace with hash -720822466, now seen corresponding path program 1 times [2021-12-21 16:03:37,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:03:37,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594836025] [2021-12-21 16:03:37,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:03:37,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:03:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:37,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 16:03:37,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:03:37,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594836025] [2021-12-21 16:03:37,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594836025] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:03:37,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:03:37,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 16:03:37,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110971843] [2021-12-21 16:03:37,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:03:37,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 16:03:37,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:03:37,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 16:03:37,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:03:37,400 INFO L87 Difference]: Start difference. First operand 938 states and 1319 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 16:03:37,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:03:37,499 INFO L93 Difference]: Finished difference Result 1873 states and 2635 transitions. [2021-12-21 16:03:37,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 16:03:37,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-21 16:03:37,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:03:37,508 INFO L225 Difference]: With dead ends: 1873 [2021-12-21 16:03:37,508 INFO L226 Difference]: Without dead ends: 938 [2021-12-21 16:03:37,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:03:37,515 INFO L933 BasicCegarLoop]: 927 mSDtfsCounter, 918 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:03:37,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 927 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:03:37,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-12-21 16:03:37,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 938. [2021-12-21 16:03:37,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 645 states have (on average 1.344186046511628) internal successors, (867), 667 states have internal predecessors, (867), 228 states have call successors, (228), 65 states have call predecessors, (228), 64 states have return successors, (222), 222 states have call predecessors, (222), 222 states have call successors, (222) [2021-12-21 16:03:37,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1317 transitions. [2021-12-21 16:03:37,589 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1317 transitions. Word has length 19 [2021-12-21 16:03:37,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:03:37,589 INFO L470 AbstractCegarLoop]: Abstraction has 938 states and 1317 transitions. [2021-12-21 16:03:37,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 16:03:37,597 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1317 transitions. [2021-12-21 16:03:37,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-21 16:03:37,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:03:37,602 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:03:37,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 16:03:37,602 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:03:37,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:03:37,605 INFO L85 PathProgramCache]: Analyzing trace with hash 569153980, now seen corresponding path program 1 times [2021-12-21 16:03:37,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:03:37,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505643759] [2021-12-21 16:03:37,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:03:37,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:03:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:37,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 16:03:37,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 16:03:37,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:03:37,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505643759] [2021-12-21 16:03:37,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505643759] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:03:37,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:03:37,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 16:03:37,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863356525] [2021-12-21 16:03:37,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:03:37,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 16:03:37,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:03:37,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 16:03:37,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 16:03:37,718 INFO L87 Difference]: Start difference. First operand 938 states and 1317 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 16:03:41,432 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:03:43,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:03:43,317 INFO L93 Difference]: Finished difference Result 2411 states and 3394 transitions. [2021-12-21 16:03:43,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 16:03:43,318 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-21 16:03:43,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:03:43,328 INFO L225 Difference]: With dead ends: 2411 [2021-12-21 16:03:43,328 INFO L226 Difference]: Without dead ends: 1476 [2021-12-21 16:03:43,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:03:43,334 INFO L933 BasicCegarLoop]: 1429 mSDtfsCounter, 991 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 467 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1129 SdHoareTripleChecker+Valid, 2200 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-21 16:03:43,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1129 Valid, 2200 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 724 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2021-12-21 16:03:43,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2021-12-21 16:03:43,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 1472. [2021-12-21 16:03:43,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1013 states have (on average 1.3455083909180652) internal successors, (1363), 1043 states have internal predecessors, (1363), 357 states have call successors, (357), 102 states have call predecessors, (357), 101 states have return successors, (351), 351 states have call predecessors, (351), 351 states have call successors, (351) [2021-12-21 16:03:43,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2071 transitions. [2021-12-21 16:03:43,438 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2071 transitions. Word has length 25 [2021-12-21 16:03:43,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:03:43,438 INFO L470 AbstractCegarLoop]: Abstraction has 1472 states and 2071 transitions. [2021-12-21 16:03:43,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 16:03:43,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2071 transitions. [2021-12-21 16:03:43,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-21 16:03:43,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:03:43,446 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:03:43,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 16:03:43,448 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:03:43,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:03:43,450 INFO L85 PathProgramCache]: Analyzing trace with hash 491627987, now seen corresponding path program 1 times [2021-12-21 16:03:43,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:03:43,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697316462] [2021-12-21 16:03:43,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:03:43,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:03:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:43,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 16:03:43,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:03:43,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697316462] [2021-12-21 16:03:43,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697316462] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:03:43,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:03:43,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 16:03:43,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715665521] [2021-12-21 16:03:43,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:03:43,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 16:03:43,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:03:43,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 16:03:43,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:03:43,538 INFO L87 Difference]: Start difference. First operand 1472 states and 2071 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 16:03:43,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:03:43,679 INFO L93 Difference]: Finished difference Result 2967 states and 4179 transitions. [2021-12-21 16:03:43,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 16:03:43,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-21 16:03:43,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:03:43,690 INFO L225 Difference]: With dead ends: 2967 [2021-12-21 16:03:43,691 INFO L226 Difference]: Without dead ends: 1498 [2021-12-21 16:03:43,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:03:43,699 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 12 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1847 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 16:03:43,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 1847 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 16:03:43,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2021-12-21 16:03:43,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1474. [2021-12-21 16:03:43,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1015 states have (on average 1.3448275862068966) internal successors, (1365), 1045 states have internal predecessors, (1365), 357 states have call successors, (357), 102 states have call predecessors, (357), 101 states have return successors, (351), 351 states have call predecessors, (351), 351 states have call successors, (351) [2021-12-21 16:03:43,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 2073 transitions. [2021-12-21 16:03:43,762 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 2073 transitions. Word has length 24 [2021-12-21 16:03:43,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:03:43,763 INFO L470 AbstractCegarLoop]: Abstraction has 1474 states and 2073 transitions. [2021-12-21 16:03:43,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 16:03:43,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 2073 transitions. [2021-12-21 16:03:43,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 16:03:43,764 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:03:43,765 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:03:43,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 16:03:43,765 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:03:43,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:03:43,766 INFO L85 PathProgramCache]: Analyzing trace with hash 402915506, now seen corresponding path program 1 times [2021-12-21 16:03:43,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:03:43,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611732366] [2021-12-21 16:03:43,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:03:43,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:03:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:43,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 16:03:43,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:03:43,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611732366] [2021-12-21 16:03:43,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611732366] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:03:43,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:03:43,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 16:03:43,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932479944] [2021-12-21 16:03:43,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:03:43,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 16:03:43,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:03:43,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 16:03:43,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:03:43,893 INFO L87 Difference]: Start difference. First operand 1474 states and 2073 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 16:03:43,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:03:43,998 INFO L93 Difference]: Finished difference Result 3380 states and 4835 transitions. [2021-12-21 16:03:43,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 16:03:43,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-21 16:03:43,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:03:44,011 INFO L225 Difference]: With dead ends: 3380 [2021-12-21 16:03:44,011 INFO L226 Difference]: Without dead ends: 1909 [2021-12-21 16:03:44,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:03:44,020 INFO L933 BasicCegarLoop]: 1277 mSDtfsCounter, 246 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 2249 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:03:44,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 2249 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:03:44,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2021-12-21 16:03:44,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1486. [2021-12-21 16:03:44,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1027 states have (on average 1.3446932814021422) internal successors, (1381), 1057 states have internal predecessors, (1381), 357 states have call successors, (357), 102 states have call predecessors, (357), 101 states have return successors, (351), 351 states have call predecessors, (351), 351 states have call successors, (351) [2021-12-21 16:03:44,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 2089 transitions. [2021-12-21 16:03:44,101 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 2089 transitions. Word has length 29 [2021-12-21 16:03:44,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:03:44,102 INFO L470 AbstractCegarLoop]: Abstraction has 1486 states and 2089 transitions. [2021-12-21 16:03:44,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 16:03:44,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 2089 transitions. [2021-12-21 16:03:44,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 16:03:44,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:03:44,104 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:03:44,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 16:03:44,105 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:03:44,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:03:44,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1038619191, now seen corresponding path program 1 times [2021-12-21 16:03:44,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:03:44,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928139617] [2021-12-21 16:03:44,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:03:44,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:03:44,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:44,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:03:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:44,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 16:03:44,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:03:44,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928139617] [2021-12-21 16:03:44,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928139617] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:03:44,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184221145] [2021-12-21 16:03:44,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:03:44,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:03:44,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:03:44,223 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 16:03:44,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 16:03:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:44,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 16:03:44,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:03:44,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 16:03:44,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:03:44,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184221145] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:03:44,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 16:03:44,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-21 16:03:44,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516783186] [2021-12-21 16:03:44,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:03:44,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 16:03:44,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:03:44,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 16:03:44,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:03:44,724 INFO L87 Difference]: Start difference. First operand 1486 states and 2089 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 16:03:44,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:03:44,815 INFO L93 Difference]: Finished difference Result 3436 states and 4919 transitions. [2021-12-21 16:03:44,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 16:03:44,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-12-21 16:03:44,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:03:44,829 INFO L225 Difference]: With dead ends: 3436 [2021-12-21 16:03:44,829 INFO L226 Difference]: Without dead ends: 1953 [2021-12-21 16:03:44,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:03:44,838 INFO L933 BasicCegarLoop]: 1013 mSDtfsCounter, 249 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 1937 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:03:44,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 1937 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:03:44,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-12-21 16:03:44,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1532. [2021-12-21 16:03:44,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1061 states have (on average 1.3468426013195098) internal successors, (1429), 1091 states have internal predecessors, (1429), 369 states have call successors, (369), 102 states have call predecessors, (369), 101 states have return successors, (363), 363 states have call predecessors, (363), 363 states have call successors, (363) [2021-12-21 16:03:44,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 2161 transitions. [2021-12-21 16:03:44,916 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 2161 transitions. Word has length 35 [2021-12-21 16:03:44,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:03:44,917 INFO L470 AbstractCegarLoop]: Abstraction has 1532 states and 2161 transitions. [2021-12-21 16:03:44,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 16:03:44,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 2161 transitions. [2021-12-21 16:03:44,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 16:03:44,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:03:44,920 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:03:44,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 16:03:45,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-21 16:03:45,136 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:03:45,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:03:45,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1739683769, now seen corresponding path program 1 times [2021-12-21 16:03:45,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:03:45,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126248280] [2021-12-21 16:03:45,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:03:45,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:03:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:45,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:03:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 16:03:45,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:03:45,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126248280] [2021-12-21 16:03:45,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126248280] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:03:45,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217508817] [2021-12-21 16:03:45,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:03:45,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:03:45,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:03:45,276 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 16:03:45,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 16:03:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:45,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 16:03:45,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:03:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 16:03:45,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:03:45,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217508817] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:03:45,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 16:03:45,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-21 16:03:45,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177760953] [2021-12-21 16:03:45,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:03:45,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 16:03:45,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:03:45,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 16:03:45,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:03:45,670 INFO L87 Difference]: Start difference. First operand 1532 states and 2161 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 16:03:45,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:03:45,736 INFO L93 Difference]: Finished difference Result 1554 states and 2187 transitions. [2021-12-21 16:03:45,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 16:03:45,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-12-21 16:03:45,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:03:45,745 INFO L225 Difference]: With dead ends: 1554 [2021-12-21 16:03:45,745 INFO L226 Difference]: Without dead ends: 1543 [2021-12-21 16:03:45,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:03:45,747 INFO L933 BasicCegarLoop]: 940 mSDtfsCounter, 923 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:03:45,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [923 Valid, 953 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:03:45,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-12-21 16:03:45,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1532. [2021-12-21 16:03:45,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1061 states have (on average 1.344957587181904) internal successors, (1427), 1091 states have internal predecessors, (1427), 369 states have call successors, (369), 102 states have call predecessors, (369), 101 states have return successors, (363), 363 states have call predecessors, (363), 363 states have call successors, (363) [2021-12-21 16:03:45,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 2159 transitions. [2021-12-21 16:03:45,807 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 2159 transitions. Word has length 35 [2021-12-21 16:03:45,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:03:45,808 INFO L470 AbstractCegarLoop]: Abstraction has 1532 states and 2159 transitions. [2021-12-21 16:03:45,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 16:03:45,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 2159 transitions. [2021-12-21 16:03:45,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 16:03:45,809 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:03:45,809 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:03:45,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 16:03:46,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-21 16:03:46,020 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:03:46,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:03:46,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1796942071, now seen corresponding path program 1 times [2021-12-21 16:03:46,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:03:46,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773490187] [2021-12-21 16:03:46,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:03:46,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:03:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:46,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:03:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:46,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 16:03:46,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:03:46,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773490187] [2021-12-21 16:03:46,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773490187] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:03:46,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487335046] [2021-12-21 16:03:46,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:03:46,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:03:46,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:03:46,120 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 16:03:46,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 16:03:46,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:46,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 1060 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 16:03:46,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:03:46,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 16:03:46,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:03:46,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487335046] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:03:46,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 16:03:46,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-21 16:03:46,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072629544] [2021-12-21 16:03:46,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:03:46,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 16:03:46,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:03:46,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 16:03:46,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:03:46,550 INFO L87 Difference]: Start difference. First operand 1532 states and 2159 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 16:03:46,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:03:46,612 INFO L93 Difference]: Finished difference Result 1534 states and 2160 transitions. [2021-12-21 16:03:46,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 16:03:46,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-12-21 16:03:46,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:03:46,621 INFO L225 Difference]: With dead ends: 1534 [2021-12-21 16:03:46,621 INFO L226 Difference]: Without dead ends: 1531 [2021-12-21 16:03:46,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:03:46,623 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 894 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:03:46,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 925 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:03:46,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2021-12-21 16:03:46,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 1531. [2021-12-21 16:03:46,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1061 states have (on average 1.3440150801131008) internal successors, (1426), 1090 states have internal predecessors, (1426), 368 states have call successors, (368), 102 states have call predecessors, (368), 101 states have return successors, (363), 363 states have call predecessors, (363), 363 states have call successors, (363) [2021-12-21 16:03:46,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 2157 transitions. [2021-12-21 16:03:46,687 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 2157 transitions. Word has length 35 [2021-12-21 16:03:46,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:03:46,687 INFO L470 AbstractCegarLoop]: Abstraction has 1531 states and 2157 transitions. [2021-12-21 16:03:46,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 16:03:46,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 2157 transitions. [2021-12-21 16:03:46,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-21 16:03:46,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:03:46,689 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:03:46,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 16:03:46,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:03:46,916 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:03:46,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:03:46,916 INFO L85 PathProgramCache]: Analyzing trace with hash -129755051, now seen corresponding path program 1 times [2021-12-21 16:03:46,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:03:46,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244250239] [2021-12-21 16:03:46,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:03:46,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:03:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:47,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:03:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 16:03:47,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:03:47,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244250239] [2021-12-21 16:03:47,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244250239] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:03:47,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850532622] [2021-12-21 16:03:47,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:03:47,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:03:47,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:03:47,040 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 16:03:47,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 16:03:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:47,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 16:03:47,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:03:47,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 16:03:47,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:03:47,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850532622] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:03:47,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 16:03:47,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-21 16:03:47,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138183578] [2021-12-21 16:03:47,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:03:47,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 16:03:47,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:03:47,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 16:03:47,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:03:47,461 INFO L87 Difference]: Start difference. First operand 1531 states and 2157 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 16:03:47,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:03:47,519 INFO L93 Difference]: Finished difference Result 1533 states and 2158 transitions. [2021-12-21 16:03:47,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 16:03:47,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-12-21 16:03:47,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:03:47,529 INFO L225 Difference]: With dead ends: 1533 [2021-12-21 16:03:47,529 INFO L226 Difference]: Without dead ends: 1530 [2021-12-21 16:03:47,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:03:47,531 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 891 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:03:47,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [891 Valid, 923 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:03:47,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2021-12-21 16:03:47,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1530. [2021-12-21 16:03:47,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1530 states, 1061 states have (on average 1.3430725730442978) internal successors, (1425), 1089 states have internal predecessors, (1425), 367 states have call successors, (367), 102 states have call predecessors, (367), 101 states have return successors, (363), 363 states have call predecessors, (363), 363 states have call successors, (363) [2021-12-21 16:03:47,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1530 states to 1530 states and 2155 transitions. [2021-12-21 16:03:47,594 INFO L78 Accepts]: Start accepts. Automaton has 1530 states and 2155 transitions. Word has length 36 [2021-12-21 16:03:47,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:03:47,594 INFO L470 AbstractCegarLoop]: Abstraction has 1530 states and 2155 transitions. [2021-12-21 16:03:47,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 16:03:47,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1530 states and 2155 transitions. [2021-12-21 16:03:47,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-21 16:03:47,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:03:47,595 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:03:47,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 16:03:47,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:03:47,811 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:03:47,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:03:47,812 INFO L85 PathProgramCache]: Analyzing trace with hash 272181178, now seen corresponding path program 1 times [2021-12-21 16:03:47,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:03:47,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389163135] [2021-12-21 16:03:47,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:03:47,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:03:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:47,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:03:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 16:03:47,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:03:47,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389163135] [2021-12-21 16:03:47,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389163135] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:03:47,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678019181] [2021-12-21 16:03:47,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:03:47,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:03:47,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:03:47,900 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 16:03:47,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 16:03:48,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:48,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 1064 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 16:03:48,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:03:48,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 16:03:48,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:03:48,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678019181] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:03:48,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 16:03:48,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-21 16:03:48,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189594219] [2021-12-21 16:03:48,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:03:48,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 16:03:48,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:03:48,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 16:03:48,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:03:48,345 INFO L87 Difference]: Start difference. First operand 1530 states and 2155 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 16:03:48,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:03:48,403 INFO L93 Difference]: Finished difference Result 1532 states and 2156 transitions. [2021-12-21 16:03:48,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 16:03:48,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-12-21 16:03:48,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:03:48,412 INFO L225 Difference]: With dead ends: 1532 [2021-12-21 16:03:48,412 INFO L226 Difference]: Without dead ends: 1529 [2021-12-21 16:03:48,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:03:48,413 INFO L933 BasicCegarLoop]: 921 mSDtfsCounter, 888 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:03:48,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 921 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:03:48,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2021-12-21 16:03:48,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1529. [2021-12-21 16:03:48,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1061 states have (on average 1.342130065975495) internal successors, (1424), 1088 states have internal predecessors, (1424), 366 states have call successors, (366), 102 states have call predecessors, (366), 101 states have return successors, (363), 363 states have call predecessors, (363), 363 states have call successors, (363) [2021-12-21 16:03:48,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 2153 transitions. [2021-12-21 16:03:48,477 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 2153 transitions. Word has length 37 [2021-12-21 16:03:48,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:03:48,477 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 2153 transitions. [2021-12-21 16:03:48,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 16:03:48,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 2153 transitions. [2021-12-21 16:03:48,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-21 16:03:48,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:03:48,478 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:03:48,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 16:03:48,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-21 16:03:48,704 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:03:48,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:03:48,704 INFO L85 PathProgramCache]: Analyzing trace with hash -152692744, now seen corresponding path program 1 times [2021-12-21 16:03:48,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:03:48,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932501570] [2021-12-21 16:03:48,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:03:48,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:03:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:48,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:03:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:48,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 16:03:48,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:03:48,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932501570] [2021-12-21 16:03:48,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932501570] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:03:48,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565319957] [2021-12-21 16:03:48,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:03:48,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:03:48,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:03:48,777 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 16:03:48,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 16:03:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:49,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 1066 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 16:03:49,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:03:49,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 16:03:49,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:03:49,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565319957] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:03:49,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 16:03:49,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-21 16:03:49,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857877922] [2021-12-21 16:03:49,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:03:49,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 16:03:49,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:03:49,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 16:03:49,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:03:49,190 INFO L87 Difference]: Start difference. First operand 1529 states and 2153 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 16:03:49,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:03:49,282 INFO L93 Difference]: Finished difference Result 1953 states and 2700 transitions. [2021-12-21 16:03:49,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 16:03:49,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-12-21 16:03:49,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:03:49,292 INFO L225 Difference]: With dead ends: 1953 [2021-12-21 16:03:49,292 INFO L226 Difference]: Without dead ends: 1916 [2021-12-21 16:03:49,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:03:49,294 INFO L933 BasicCegarLoop]: 1046 mSDtfsCounter, 818 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:03:49,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 1423 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:03:49,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2021-12-21 16:03:49,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1916. [2021-12-21 16:03:49,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1300 states have (on average 1.32) internal successors, (1716), 1335 states have internal predecessors, (1716), 469 states have call successors, (469), 147 states have call predecessors, (469), 146 states have return successors, (468), 468 states have call predecessors, (468), 468 states have call successors, (468) [2021-12-21 16:03:49,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2653 transitions. [2021-12-21 16:03:49,370 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2653 transitions. Word has length 38 [2021-12-21 16:03:49,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:03:49,370 INFO L470 AbstractCegarLoop]: Abstraction has 1916 states and 2653 transitions. [2021-12-21 16:03:49,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 16:03:49,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2653 transitions. [2021-12-21 16:03:49,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 16:03:49,373 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:03:49,373 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:03:49,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 16:03:49,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:03:49,595 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:03:49,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:03:49,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1937560449, now seen corresponding path program 1 times [2021-12-21 16:03:49,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:03:49,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64935797] [2021-12-21 16:03:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:03:49,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:03:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:49,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:03:49,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:49,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 16:03:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:49,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 16:03:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:49,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 16:03:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:49,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 16:03:49,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:03:49,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64935797] [2021-12-21 16:03:49,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64935797] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:03:49,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264738129] [2021-12-21 16:03:49,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:03:49,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:03:49,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:03:49,689 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 16:03:49,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 16:03:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:50,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 16:03:50,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:03:50,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 16:03:50,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:03:50,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264738129] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:03:50,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 16:03:50,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-21 16:03:50,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74536537] [2021-12-21 16:03:50,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:03:50,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 16:03:50,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:03:50,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 16:03:50,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 16:03:50,181 INFO L87 Difference]: Start difference. First operand 1916 states and 2653 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 16:03:50,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:03:50,292 INFO L93 Difference]: Finished difference Result 3839 states and 5318 transitions. [2021-12-21 16:03:50,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 16:03:50,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2021-12-21 16:03:50,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:03:50,304 INFO L225 Difference]: With dead ends: 3839 [2021-12-21 16:03:50,304 INFO L226 Difference]: Without dead ends: 1926 [2021-12-21 16:03:50,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 16:03:50,313 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 9 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1752 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:03:50,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1752 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:03:50,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-12-21 16:03:50,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1918. [2021-12-21 16:03:50,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1302 states have (on average 1.3195084485407067) internal successors, (1718), 1337 states have internal predecessors, (1718), 469 states have call successors, (469), 147 states have call predecessors, (469), 146 states have return successors, (468), 468 states have call predecessors, (468), 468 states have call successors, (468) [2021-12-21 16:03:50,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 2655 transitions. [2021-12-21 16:03:50,429 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 2655 transitions. Word has length 65 [2021-12-21 16:03:50,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:03:50,430 INFO L470 AbstractCegarLoop]: Abstraction has 1918 states and 2655 transitions. [2021-12-21 16:03:50,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 16:03:50,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 2655 transitions. [2021-12-21 16:03:50,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-21 16:03:50,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:03:50,434 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:03:50,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 16:03:50,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:03:50,659 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:03:50,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:03:50,660 INFO L85 PathProgramCache]: Analyzing trace with hash 175478772, now seen corresponding path program 1 times [2021-12-21 16:03:50,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:03:50,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324576613] [2021-12-21 16:03:50,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:03:50,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:03:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:50,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:03:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:50,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:03:50,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:50,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 16:03:50,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:50,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-21 16:03:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:50,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 16:03:50,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:03:50,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324576613] [2021-12-21 16:03:50,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324576613] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:03:50,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365690695] [2021-12-21 16:03:50,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:03:50,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:03:50,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:03:50,752 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 16:03:50,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 16:03:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:03:51,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 16:03:51,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:03:51,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 16:03:51,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 16:03:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 16:03:51,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365690695] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 16:03:51,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 16:03:51,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2021-12-21 16:03:51,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660778843] [2021-12-21 16:03:51,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 16:03:51,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 16:03:51,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:03:51,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 16:03:51,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:03:51,415 INFO L87 Difference]: Start difference. First operand 1918 states and 2655 transitions. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 7 states have internal predecessors, (83), 1 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-21 16:03:56,065 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:03:58,102 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:04:00,119 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:04:02,049 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:04:03,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:04:03,557 INFO L93 Difference]: Finished difference Result 3991 states and 5547 transitions. [2021-12-21 16:04:03,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:04:03,557 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 7 states have internal predecessors, (83), 1 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 69 [2021-12-21 16:04:03,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:04:03,568 INFO L225 Difference]: With dead ends: 3991 [2021-12-21 16:04:03,568 INFO L226 Difference]: Without dead ends: 2076 [2021-12-21 16:04:03,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:04:03,575 INFO L933 BasicCegarLoop]: 789 mSDtfsCounter, 391 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 169 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 2372 SdHoareTripleChecker+Invalid, 1675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:04:03,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 2372 Invalid, 1675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 1503 Invalid, 3 Unknown, 0 Unchecked, 12.0s Time] [2021-12-21 16:04:03,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2021-12-21 16:04:03,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 2076. [2021-12-21 16:04:03,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 1430 states have (on average 1.3146853146853146) internal successors, (1880), 1465 states have internal predecessors, (1880), 499 states have call successors, (499), 147 states have call predecessors, (499), 146 states have return successors, (498), 498 states have call predecessors, (498), 498 states have call successors, (498) [2021-12-21 16:04:03,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 2877 transitions. [2021-12-21 16:04:03,658 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 2877 transitions. Word has length 69 [2021-12-21 16:04:03,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:04:03,658 INFO L470 AbstractCegarLoop]: Abstraction has 2076 states and 2877 transitions. [2021-12-21 16:04:03,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 7 states have internal predecessors, (83), 1 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-21 16:04:03,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 2877 transitions. [2021-12-21 16:04:03,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-21 16:04:03,661 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:04:03,661 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:04:03,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 16:04:03,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-21 16:04:03,885 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:04:03,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:04:03,885 INFO L85 PathProgramCache]: Analyzing trace with hash -834193707, now seen corresponding path program 2 times [2021-12-21 16:04:03,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:04:03,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846805253] [2021-12-21 16:04:03,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:04:03,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:04:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:04:03,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 16:04:03,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:04:03,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 16:04:03,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:04:03,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 16:04:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:04:04,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 16:04:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:04:04,007 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-21 16:04:04,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:04:04,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846805253] [2021-12-21 16:04:04,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846805253] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:04:04,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:04:04,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:04:04,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511455340] [2021-12-21 16:04:04,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:04:04,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:04:04,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:04:04,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:04:04,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:04:04,009 INFO L87 Difference]: Start difference. First operand 2076 states and 2877 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 16:04:08,292 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:04:10,323 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:04:12,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:04:12,077 INFO L93 Difference]: Finished difference Result 4521 states and 6345 transitions. [2021-12-21 16:04:12,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 16:04:12,077 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 84 [2021-12-21 16:04:12,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:04:12,089 INFO L225 Difference]: With dead ends: 4521 [2021-12-21 16:04:12,089 INFO L226 Difference]: Without dead ends: 2448 [2021-12-21 16:04:12,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 16:04:12,097 INFO L933 BasicCegarLoop]: 1048 mSDtfsCounter, 700 mSDsluCounter, 1417 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 247 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 2465 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2021-12-21 16:04:12,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [797 Valid, 2465 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1063 Invalid, 2 Unknown, 0 Unchecked, 7.9s Time] [2021-12-21 16:04:12,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2021-12-21 16:04:12,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 2080. [2021-12-21 16:04:12,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 1434 states have (on average 1.3138075313807531) internal successors, (1884), 1469 states have internal predecessors, (1884), 499 states have call successors, (499), 147 states have call predecessors, (499), 146 states have return successors, (498), 498 states have call predecessors, (498), 498 states have call successors, (498) [2021-12-21 16:04:12,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 2881 transitions. [2021-12-21 16:04:12,194 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 2881 transitions. Word has length 84 [2021-12-21 16:04:12,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:04:12,194 INFO L470 AbstractCegarLoop]: Abstraction has 2080 states and 2881 transitions. [2021-12-21 16:04:12,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 16:04:12,195 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 2881 transitions. [2021-12-21 16:04:12,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-21 16:04:12,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:04:12,197 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:04:12,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 16:04:12,198 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:04:12,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:04:12,198 INFO L85 PathProgramCache]: Analyzing trace with hash 2145382468, now seen corresponding path program 1 times [2021-12-21 16:04:12,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:04:12,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942378578] [2021-12-21 16:04:12,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:04:12,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:04:12,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:04:12,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 16:04:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:04:12,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 16:04:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:04:12,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 16:04:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:04:12,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 16:04:12,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:04:12,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-21 16:04:12,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:04:12,403 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-21 16:04:12,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:04:12,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942378578] [2021-12-21 16:04:12,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942378578] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:04:12,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:04:12,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 16:04:12,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001389717] [2021-12-21 16:04:12,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:04:12,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 16:04:12,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:04:12,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 16:04:12,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:04:12,405 INFO L87 Difference]: Start difference. First operand 2080 states and 2881 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 16:04:18,851 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:04:22,212 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:04:23,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:04:23,837 INFO L93 Difference]: Finished difference Result 4651 states and 6557 transitions. [2021-12-21 16:04:23,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 16:04:23,837 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 94 [2021-12-21 16:04:23,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:04:23,851 INFO L225 Difference]: With dead ends: 4651 [2021-12-21 16:04:23,851 INFO L226 Difference]: Without dead ends: 2574 [2021-12-21 16:04:23,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-21 16:04:23,857 INFO L933 BasicCegarLoop]: 1079 mSDtfsCounter, 729 mSDsluCounter, 2849 mSDsCounter, 0 mSdLazyCounter, 1959 mSolverCounterSat, 423 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 3928 SdHoareTripleChecker+Invalid, 2383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 1959 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2021-12-21 16:04:23,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 3928 Invalid, 2383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 1959 Invalid, 1 Unknown, 0 Unchecked, 11.2s Time] [2021-12-21 16:04:23,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2021-12-21 16:04:23,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 2092. [2021-12-21 16:04:23,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 1444 states have (on average 1.311634349030471) internal successors, (1894), 1477 states have internal predecessors, (1894), 499 states have call successors, (499), 147 states have call predecessors, (499), 148 states have return successors, (516), 502 states have call predecessors, (516), 498 states have call successors, (516) [2021-12-21 16:04:23,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 2909 transitions. [2021-12-21 16:04:23,959 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 2909 transitions. Word has length 94 [2021-12-21 16:04:23,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:04:23,959 INFO L470 AbstractCegarLoop]: Abstraction has 2092 states and 2909 transitions. [2021-12-21 16:04:23,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 16:04:23,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 2909 transitions. [2021-12-21 16:04:23,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-21 16:04:23,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:04:23,962 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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] [2021-12-21 16:04:23,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 16:04:23,963 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:04:23,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:04:23,963 INFO L85 PathProgramCache]: Analyzing trace with hash 923753966, now seen corresponding path program 1 times [2021-12-21 16:04:23,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:04:23,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924383961] [2021-12-21 16:04:23,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:04:23,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:04:24,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:04:24,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 16:04:24,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:04:24,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-21 16:04:24,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:04:24,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 16:04:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:04:24,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 16:04:24,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:04:24,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-21 16:04:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:04:24,138 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 16:04:24,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:04:24,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924383961] [2021-12-21 16:04:24,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924383961] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:04:24,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:04:24,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 16:04:24,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683748434] [2021-12-21 16:04:24,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:04:24,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 16:04:24,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:04:24,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 16:04:24,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:04:24,140 INFO L87 Difference]: Start difference. First operand 2092 states and 2909 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 16:04:26,570 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []