./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--pf.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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--pf.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 65cc93bea37c503291576929a444106bffa9d5b7b84b8d294ee7e7120b60ffa5 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 03:47:53,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 03:47:53,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 03:47:54,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 03:47:54,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 03:47:54,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 03:47:54,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 03:47:54,027 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 03:47:54,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 03:47:54,032 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 03:47:54,033 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 03:47:54,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 03:47:54,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 03:47:54,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 03:47:54,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 03:47:54,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 03:47:54,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 03:47:54,044 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 03:47:54,046 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 03:47:54,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 03:47:54,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 03:47:54,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 03:47:54,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 03:47:54,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 03:47:54,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 03:47:54,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 03:47:54,061 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 03:47:54,062 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 03:47:54,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 03:47:54,073 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 03:47:54,073 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 03:47:54,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 03:47:54,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 03:47:54,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 03:47:54,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 03:47:54,077 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 03:47:54,078 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 03:47:54,078 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 03:47:54,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 03:47:54,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 03:47:54,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 03:47:54,081 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-28 03:47:54,115 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 03:47:54,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 03:47:54,116 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 03:47:54,116 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 03:47:54,117 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 03:47:54,117 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 03:47:54,118 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 03:47:54,118 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 03:47:54,118 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 03:47:54,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 03:47:54,119 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 03:47:54,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 03:47:54,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 03:47:54,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 03:47:54,120 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 03:47:54,120 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 03:47:54,120 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 03:47:54,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 03:47:54,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 03:47:54,121 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 03:47:54,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 03:47:54,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:47:54,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 03:47:54,122 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 03:47:54,122 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 03:47:54,122 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 03:47:54,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 03:47:54,122 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 03:47:54,123 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 03:47:54,123 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 03:47:54,123 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65cc93bea37c503291576929a444106bffa9d5b7b84b8d294ee7e7120b60ffa5 [2021-12-28 03:47:54,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 03:47:54,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 03:47:54,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 03:47:54,450 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 03:47:54,450 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 03:47:54,452 INFO L432 ainManager$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--pf.ko-main.cil.out.i [2021-12-28 03:47:54,503 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40036f78f/fffed560fc34409ca2d9801a2b320cc9/FLAGe1297dcc4 [2021-12-28 03:47:55,110 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 03:47:55,110 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pf.ko-main.cil.out.i [2021-12-28 03:47:55,146 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40036f78f/fffed560fc34409ca2d9801a2b320cc9/FLAGe1297dcc4 [2021-12-28 03:47:55,531 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40036f78f/fffed560fc34409ca2d9801a2b320cc9 [2021-12-28 03:47:55,533 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 03:47:55,535 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 03:47:55,535 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 03:47:55,536 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 03:47:55,539 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 03:47:55,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:47:55" (1/1) ... [2021-12-28 03:47:55,540 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39fb0f95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:47:55, skipping insertion in model container [2021-12-28 03:47:55,540 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:47:55" (1/1) ... [2021-12-28 03:47:55,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 03:47:55,636 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 03:47:56,491 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--pf.ko-main.cil.out.i[138616,138629] [2021-12-28 03:47:56,573 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:47:56,611 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 03:47:56,826 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--pf.ko-main.cil.out.i[138616,138629] [2021-12-28 03:47:56,846 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:47:56,892 INFO L208 MainTranslator]: Completed translation [2021-12-28 03:47:56,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:47:56 WrapperNode [2021-12-28 03:47:56,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 03:47:56,895 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 03:47:56,896 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 03:47:56,896 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 03:47:56,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:47:56" (1/1) ... [2021-12-28 03:47:56,975 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:47:56" (1/1) ... [2021-12-28 03:47:57,032 INFO L137 Inliner]: procedures = 161, calls = 836, calls flagged for inlining = 53, calls inlined = 28, statements flattened = 1112 [2021-12-28 03:47:57,042 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 03:47:57,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 03:47:57,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 03:47:57,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 03:47:57,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:47:56" (1/1) ... [2021-12-28 03:47:57,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:47:56" (1/1) ... [2021-12-28 03:47:57,064 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:47:56" (1/1) ... [2021-12-28 03:47:57,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:47:56" (1/1) ... [2021-12-28 03:47:57,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:47:56" (1/1) ... [2021-12-28 03:47:57,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:47:56" (1/1) ... [2021-12-28 03:47:57,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:47:56" (1/1) ... [2021-12-28 03:47:57,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 03:47:57,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 03:47:57,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 03:47:57,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 03:47:57,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:47:56" (1/1) ... [2021-12-28 03:47:57,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:47:57,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:47:57,176 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) [2021-12-28 03:47:57,222 INFO L130 BoogieDeclarations]: Found specification of procedure pi_release [2021-12-28 03:47:57,223 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_release [2021-12-28 03:47:57,207 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 [2021-12-28 03:47:57,224 INFO L130 BoogieDeclarations]: Found specification of procedure pf_getgeo [2021-12-28 03:47:57,224 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_getgeo [2021-12-28 03:47:57,224 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2021-12-28 03:47:57,225 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2021-12-28 03:47:57,225 INFO L130 BoogieDeclarations]: Found specification of procedure pi_disconnect [2021-12-28 03:47:57,225 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_disconnect [2021-12-28 03:47:57,225 INFO L130 BoogieDeclarations]: Found specification of procedure status_reg [2021-12-28 03:47:57,225 INFO L138 BoogieDeclarations]: Found implementation of procedure status_reg [2021-12-28 03:47:57,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-28 03:47:57,226 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_pf_mutex [2021-12-28 03:47:57,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_pf_mutex [2021-12-28 03:47:57,226 INFO L130 BoogieDeclarations]: Found specification of procedure pf_reset [2021-12-28 03:47:57,226 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_reset [2021-12-28 03:47:57,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 03:47:57,227 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_block [2021-12-28 03:47:57,227 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_block [2021-12-28 03:47:57,227 INFO L130 BoogieDeclarations]: Found specification of procedure pf_wait [2021-12-28 03:47:57,227 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_wait [2021-12-28 03:47:57,227 INFO L130 BoogieDeclarations]: Found specification of procedure read_reg [2021-12-28 03:47:57,228 INFO L138 BoogieDeclarations]: Found implementation of procedure read_reg [2021-12-28 03:47:57,228 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-28 03:47:57,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-28 03:47:57,228 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_pf_mutex [2021-12-28 03:47:57,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_pf_mutex [2021-12-28 03:47:57,228 INFO L130 BoogieDeclarations]: Found specification of procedure pf_check_events [2021-12-28 03:47:57,229 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_check_events [2021-12-28 03:47:57,229 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_blkdev [2021-12-28 03:47:57,229 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_blkdev [2021-12-28 03:47:57,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 03:47:57,229 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-12-28 03:47:57,229 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-12-28 03:47:57,229 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-28 03:47:57,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-28 03:47:57,230 INFO L130 BoogieDeclarations]: Found specification of procedure set_capacity [2021-12-28 03:47:57,230 INFO L138 BoogieDeclarations]: Found implementation of procedure set_capacity [2021-12-28 03:47:57,230 INFO L130 BoogieDeclarations]: Found specification of procedure pf_req_sense [2021-12-28 03:47:57,230 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_req_sense [2021-12-28 03:47:57,231 INFO L130 BoogieDeclarations]: Found specification of procedure pf_completion [2021-12-28 03:47:57,231 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_completion [2021-12-28 03:47:57,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 03:47:57,231 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-12-28 03:47:57,231 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-12-28 03:47:57,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 03:47:57,232 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-12-28 03:47:57,232 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-12-28 03:47:57,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 03:47:57,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 03:47:57,232 INFO L130 BoogieDeclarations]: Found specification of procedure pf_atapi [2021-12-28 03:47:57,233 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_atapi [2021-12-28 03:47:57,233 INFO L130 BoogieDeclarations]: Found specification of procedure pf_command [2021-12-28 03:47:57,233 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_command [2021-12-28 03:47:57,233 INFO L130 BoogieDeclarations]: Found specification of procedure pf_probe [2021-12-28 03:47:57,233 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_probe [2021-12-28 03:47:57,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 03:47:57,234 INFO L130 BoogieDeclarations]: Found specification of procedure pf_identify [2021-12-28 03:47:57,235 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_identify [2021-12-28 03:47:57,235 INFO L130 BoogieDeclarations]: Found specification of procedure pf_sleep [2021-12-28 03:47:57,235 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_sleep [2021-12-28 03:47:57,236 INFO L130 BoogieDeclarations]: Found specification of procedure pf_mode_sense [2021-12-28 03:47:57,236 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_mode_sense [2021-12-28 03:47:57,236 INFO L130 BoogieDeclarations]: Found specification of procedure pi_write_block [2021-12-28 03:47:57,236 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_write_block [2021-12-28 03:47:57,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 03:47:57,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-28 03:47:57,237 INFO L130 BoogieDeclarations]: Found specification of procedure pi_init [2021-12-28 03:47:57,237 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_init [2021-12-28 03:47:57,237 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_regr [2021-12-28 03:47:57,237 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_regr [2021-12-28 03:47:57,237 INFO L130 BoogieDeclarations]: Found specification of procedure pi_connect [2021-12-28 03:47:57,238 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_connect [2021-12-28 03:47:57,238 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2021-12-28 03:47:57,238 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2021-12-28 03:47:57,239 INFO L130 BoogieDeclarations]: Found specification of procedure get_capacity [2021-12-28 03:47:57,239 INFO L138 BoogieDeclarations]: Found implementation of procedure get_capacity [2021-12-28 03:47:57,239 INFO L130 BoogieDeclarations]: Found specification of procedure pf_lock [2021-12-28 03:47:57,239 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_lock [2021-12-28 03:47:57,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 03:47:57,239 INFO L130 BoogieDeclarations]: Found specification of procedure xl [2021-12-28 03:47:57,240 INFO L138 BoogieDeclarations]: Found implementation of procedure xl [2021-12-28 03:47:57,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 03:47:57,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 03:47:57,240 INFO L130 BoogieDeclarations]: Found specification of procedure xs [2021-12-28 03:47:57,240 INFO L138 BoogieDeclarations]: Found implementation of procedure xs [2021-12-28 03:47:57,240 INFO L130 BoogieDeclarations]: Found specification of procedure pf_ioctl [2021-12-28 03:47:57,240 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_ioctl [2021-12-28 03:47:57,576 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 03:47:57,578 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 03:47:59,813 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 03:47:59,828 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 03:47:59,829 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-28 03:47:59,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:47:59 BoogieIcfgContainer [2021-12-28 03:47:59,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 03:47:59,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 03:47:59,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 03:47:59,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 03:47:59,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 03:47:55" (1/3) ... [2021-12-28 03:47:59,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@311717fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:47:59, skipping insertion in model container [2021-12-28 03:47:59,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:47:56" (2/3) ... [2021-12-28 03:47:59,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@311717fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:47:59, skipping insertion in model container [2021-12-28 03:47:59,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:47:59" (3/3) ... [2021-12-28 03:47:59,840 INFO L111 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pf.ko-main.cil.out.i [2021-12-28 03:47:59,844 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 03:47:59,844 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 03:47:59,894 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 03:47:59,901 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 [2021-12-28 03:47:59,902 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 03:47:59,940 INFO L276 IsEmpty]: Start isEmpty. Operand has 500 states, 351 states have (on average 1.339031339031339) internal successors, (470), 365 states have internal predecessors, (470), 112 states have call successors, (112), 37 states have call predecessors, (112), 37 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2021-12-28 03:47:59,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-28 03:47:59,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:47:59,948 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:47:59,948 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:47:59,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:47:59,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1807402522, now seen corresponding path program 1 times [2021-12-28 03:47:59,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:47:59,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36114458] [2021-12-28 03:47:59,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:47:59,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:00,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:00,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:48:00,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:00,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36114458] [2021-12-28 03:48:00,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36114458] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:00,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:48:00,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 03:48:00,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056714477] [2021-12-28 03:48:00,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:00,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:48:00,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:00,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:48:00,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:48:00,333 INFO L87 Difference]: Start difference. First operand has 500 states, 351 states have (on average 1.339031339031339) internal successors, (470), 365 states have internal predecessors, (470), 112 states have call successors, (112), 37 states have call predecessors, (112), 37 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:48:00,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:00,521 INFO L93 Difference]: Finished difference Result 1372 states and 1941 transitions. [2021-12-28 03:48:00,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:48:00,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-28 03:48:00,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:00,548 INFO L225 Difference]: With dead ends: 1372 [2021-12-28 03:48:00,549 INFO L226 Difference]: Without dead ends: 867 [2021-12-28 03:48:00,558 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 [2021-12-28 03:48:00,564 INFO L933 BasicCegarLoop]: 954 mSDtfsCounter, 515 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1597 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:48:00,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 1597 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:48:00,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2021-12-28 03:48:00,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 853. [2021-12-28 03:48:00,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 601 states have (on average 1.3277870216306156) internal successors, (798), 614 states have internal predecessors, (798), 187 states have call successors, (187), 65 states have call predecessors, (187), 64 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2021-12-28 03:48:00,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1166 transitions. [2021-12-28 03:48:00,688 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1166 transitions. Word has length 16 [2021-12-28 03:48:00,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:00,689 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 1166 transitions. [2021-12-28 03:48:00,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:48:00,689 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1166 transitions. [2021-12-28 03:48:00,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-28 03:48:00,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:00,691 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:48:00,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 03:48:00,691 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:00,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:00,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2052204385, now seen corresponding path program 1 times [2021-12-28 03:48:00,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:00,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123203003] [2021-12-28 03:48:00,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:00,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:00,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:48:00,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:00,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123203003] [2021-12-28 03:48:00,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123203003] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:00,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:48:00,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 03:48:00,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410196698] [2021-12-28 03:48:00,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:00,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:48:00,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:00,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:48:00,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:48:00,794 INFO L87 Difference]: Start difference. First operand 853 states and 1166 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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) [2021-12-28 03:48:00,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:00,838 INFO L93 Difference]: Finished difference Result 1703 states and 2329 transitions. [2021-12-28 03:48:00,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:48:00,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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 18 [2021-12-28 03:48:00,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:00,846 INFO L225 Difference]: With dead ends: 1703 [2021-12-28 03:48:00,847 INFO L226 Difference]: Without dead ends: 853 [2021-12-28 03:48:00,850 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 [2021-12-28 03:48:00,851 INFO L933 BasicCegarLoop]: 667 mSDtfsCounter, 658 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 667 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 [2021-12-28 03:48:00,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 667 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:48:00,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-12-28 03:48:00,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 853. [2021-12-28 03:48:00,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 601 states have (on average 1.324459234608985) internal successors, (796), 614 states have internal predecessors, (796), 187 states have call successors, (187), 65 states have call predecessors, (187), 64 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2021-12-28 03:48:00,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1164 transitions. [2021-12-28 03:48:00,921 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1164 transitions. Word has length 18 [2021-12-28 03:48:00,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:00,922 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 1164 transitions. [2021-12-28 03:48:00,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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) [2021-12-28 03:48:00,925 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1164 transitions. [2021-12-28 03:48:00,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-28 03:48:00,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:00,931 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] [2021-12-28 03:48:00,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 03:48:00,932 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:00,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:00,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1303897293, now seen corresponding path program 1 times [2021-12-28 03:48:00,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:00,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105465760] [2021-12-28 03:48:00,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:00,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:01,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:48:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:01,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:48:01,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:01,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105465760] [2021-12-28 03:48:01,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105465760] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:01,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:48:01,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 03:48:01,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693248777] [2021-12-28 03:48:01,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:01,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:48:01,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:01,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:48:01,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:48:01,063 INFO L87 Difference]: Start difference. First operand 853 states and 1164 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-12-28 03:48:01,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:01,149 INFO L93 Difference]: Finished difference Result 2047 states and 2785 transitions. [2021-12-28 03:48:01,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:48:01,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 22 [2021-12-28 03:48:01,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:01,156 INFO L225 Difference]: With dead ends: 2047 [2021-12-28 03:48:01,156 INFO L226 Difference]: Without dead ends: 1197 [2021-12-28 03:48:01,159 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 [2021-12-28 03:48:01,161 INFO L933 BasicCegarLoop]: 1064 mSDtfsCounter, 624 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 1520 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:48:01,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 1520 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:48:01,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-12-28 03:48:01,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 1173. [2021-12-28 03:48:01,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 819 states have (on average 1.3223443223443223) internal successors, (1083), 836 states have internal predecessors, (1083), 258 states have call successors, (258), 96 states have call predecessors, (258), 95 states have return successors, (252), 252 states have call predecessors, (252), 252 states have call successors, (252) [2021-12-28 03:48:01,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1593 transitions. [2021-12-28 03:48:01,240 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1593 transitions. Word has length 22 [2021-12-28 03:48:01,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:01,240 INFO L470 AbstractCegarLoop]: Abstraction has 1173 states and 1593 transitions. [2021-12-28 03:48:01,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-12-28 03:48:01,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1593 transitions. [2021-12-28 03:48:01,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-28 03:48:01,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:01,242 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] [2021-12-28 03:48:01,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 03:48:01,244 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:01,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:01,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1871947068, now seen corresponding path program 1 times [2021-12-28 03:48:01,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:01,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446178111] [2021-12-28 03:48:01,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:01,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:01,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:01,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:48:01,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:01,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446178111] [2021-12-28 03:48:01,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446178111] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:01,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:48:01,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 03:48:01,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448666741] [2021-12-28 03:48:01,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:01,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:48:01,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:01,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:48:01,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:48:01,331 INFO L87 Difference]: Start difference. First operand 1173 states and 1593 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2021-12-28 03:48:01,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:01,470 INFO L93 Difference]: Finished difference Result 2359 states and 3207 transitions. [2021-12-28 03:48:01,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:48:01,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 25 [2021-12-28 03:48:01,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:01,478 INFO L225 Difference]: With dead ends: 2359 [2021-12-28 03:48:01,478 INFO L226 Difference]: Without dead ends: 1189 [2021-12-28 03:48:01,485 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 [2021-12-28 03:48:01,487 INFO L933 BasicCegarLoop]: 664 mSDtfsCounter, 10 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:48:01,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1326 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:48:01,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-12-28 03:48:01,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1175. [2021-12-28 03:48:01,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 821 states have (on average 1.3215590742996346) internal successors, (1085), 838 states have internal predecessors, (1085), 258 states have call successors, (258), 96 states have call predecessors, (258), 95 states have return successors, (252), 252 states have call predecessors, (252), 252 states have call successors, (252) [2021-12-28 03:48:01,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 1595 transitions. [2021-12-28 03:48:01,543 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 1595 transitions. Word has length 25 [2021-12-28 03:48:01,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:01,544 INFO L470 AbstractCegarLoop]: Abstraction has 1175 states and 1595 transitions. [2021-12-28 03:48:01,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2021-12-28 03:48:01,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 1595 transitions. [2021-12-28 03:48:01,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-28 03:48:01,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:01,545 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] [2021-12-28 03:48:01,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 03:48:01,545 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:01,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:01,546 INFO L85 PathProgramCache]: Analyzing trace with hash -354644035, now seen corresponding path program 1 times [2021-12-28 03:48:01,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:01,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399538141] [2021-12-28 03:48:01,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:01,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:48:01,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:01,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399538141] [2021-12-28 03:48:01,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399538141] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:48:01,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308995656] [2021-12-28 03:48:01,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:01,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:01,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:48:01,680 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) [2021-12-28 03:48:01,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 03:48:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:02,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 1014 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 03:48:02,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:48:02,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:48:02,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:48:02,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308995656] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:02,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:48:02,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-28 03:48:02,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978042177] [2021-12-28 03:48:02,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:02,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:48:02,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:02,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:48:02,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:02,098 INFO L87 Difference]: Start difference. First operand 1175 states and 1595 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) [2021-12-28 03:48:02,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:02,153 INFO L93 Difference]: Finished difference Result 2385 states and 3247 transitions. [2021-12-28 03:48:02,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:48:02,154 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 [2021-12-28 03:48:02,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:02,160 INFO L225 Difference]: With dead ends: 2385 [2021-12-28 03:48:02,161 INFO L226 Difference]: Without dead ends: 1213 [2021-12-28 03:48:02,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:02,165 INFO L933 BasicCegarLoop]: 680 mSDtfsCounter, 16 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:48:02,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 1341 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:48:02,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-12-28 03:48:02,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1179. [2021-12-28 03:48:02,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 825 states have (on average 1.32) internal successors, (1089), 842 states have internal predecessors, (1089), 258 states have call successors, (258), 96 states have call predecessors, (258), 95 states have return successors, (252), 252 states have call predecessors, (252), 252 states have call successors, (252) [2021-12-28 03:48:02,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1599 transitions. [2021-12-28 03:48:02,210 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1599 transitions. Word has length 29 [2021-12-28 03:48:02,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:02,210 INFO L470 AbstractCegarLoop]: Abstraction has 1179 states and 1599 transitions. [2021-12-28 03:48:02,210 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) [2021-12-28 03:48:02,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1599 transitions. [2021-12-28 03:48:02,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-28 03:48:02,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:02,212 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] [2021-12-28 03:48:02,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 03:48:02,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:02,438 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:02,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:02,439 INFO L85 PathProgramCache]: Analyzing trace with hash -180222204, now seen corresponding path program 1 times [2021-12-28 03:48:02,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:02,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973795681] [2021-12-28 03:48:02,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:02,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:02,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:02,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:48:02,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:02,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973795681] [2021-12-28 03:48:02,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973795681] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:48:02,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401715871] [2021-12-28 03:48:02,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:02,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:02,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:48:02,518 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) [2021-12-28 03:48:02,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 03:48:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:02,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:48:02,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:48:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 03:48:02,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:48:02,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401715871] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:02,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:48:02,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-28 03:48:02,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150094018] [2021-12-28 03:48:02,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:02,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:48:02,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:02,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:48:02,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:02,910 INFO L87 Difference]: Start difference. First operand 1179 states and 1599 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2021-12-28 03:48:03,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:03,049 INFO L93 Difference]: Finished difference Result 3479 states and 4709 transitions. [2021-12-28 03:48:03,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:48:03,050 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), 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 33 [2021-12-28 03:48:03,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:03,064 INFO L225 Difference]: With dead ends: 3479 [2021-12-28 03:48:03,065 INFO L226 Difference]: Without dead ends: 2303 [2021-12-28 03:48:03,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:03,070 INFO L933 BasicCegarLoop]: 765 mSDtfsCounter, 634 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 1411 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 [2021-12-28 03:48:03,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 1411 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:48:03,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2021-12-28 03:48:03,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 1882. [2021-12-28 03:48:03,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1311 states have (on average 1.3127383676582762) internal successors, (1721), 1336 states have internal predecessors, (1721), 414 states have call successors, (414), 157 states have call predecessors, (414), 156 states have return successors, (408), 408 states have call predecessors, (408), 408 states have call successors, (408) [2021-12-28 03:48:03,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2543 transitions. [2021-12-28 03:48:03,178 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2543 transitions. Word has length 33 [2021-12-28 03:48:03,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:03,178 INFO L470 AbstractCegarLoop]: Abstraction has 1882 states and 2543 transitions. [2021-12-28 03:48:03,178 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), 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) [2021-12-28 03:48:03,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2543 transitions. [2021-12-28 03:48:03,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-28 03:48:03,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:03,181 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] [2021-12-28 03:48:03,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 03:48:03,395 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,SelfDestructingSolverStorable5 [2021-12-28 03:48:03,395 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:03,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:03,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1948802419, now seen corresponding path program 1 times [2021-12-28 03:48:03,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:03,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103158847] [2021-12-28 03:48:03,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:03,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:03,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:03,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 03:48:03,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:48:03,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:03,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103158847] [2021-12-28 03:48:03,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103158847] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:48:03,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133130135] [2021-12-28 03:48:03,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:03,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:03,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:48:03,472 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) [2021-12-28 03:48:03,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 03:48:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:03,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 1087 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:48:03,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:48:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:48:03,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:48:03,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133130135] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:03,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:48:03,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-28 03:48:03,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064523907] [2021-12-28 03:48:03,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:03,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:48:03,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:03,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:48:03,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:03,837 INFO L87 Difference]: Start difference. First operand 1882 states and 2543 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2021-12-28 03:48:03,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:03,920 INFO L93 Difference]: Finished difference Result 4183 states and 5749 transitions. [2021-12-28 03:48:03,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:48:03,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 34 [2021-12-28 03:48:03,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:03,935 INFO L225 Difference]: With dead ends: 4183 [2021-12-28 03:48:03,935 INFO L226 Difference]: Without dead ends: 2304 [2021-12-28 03:48:03,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:03,943 INFO L933 BasicCegarLoop]: 733 mSDtfsCounter, 179 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1379 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:48:03,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 1379 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:48:03,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2021-12-28 03:48:04,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 1915. [2021-12-28 03:48:04,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1336 states have (on average 1.31437125748503) internal successors, (1756), 1361 states have internal predecessors, (1756), 422 states have call successors, (422), 157 states have call predecessors, (422), 156 states have return successors, (416), 416 states have call predecessors, (416), 416 states have call successors, (416) [2021-12-28 03:48:04,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 2594 transitions. [2021-12-28 03:48:04,019 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 2594 transitions. Word has length 34 [2021-12-28 03:48:04,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:04,021 INFO L470 AbstractCegarLoop]: Abstraction has 1915 states and 2594 transitions. [2021-12-28 03:48:04,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2021-12-28 03:48:04,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 2594 transitions. [2021-12-28 03:48:04,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-28 03:48:04,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:04,023 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, 1, 1, 1, 1, 1] [2021-12-28 03:48:04,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 03:48:04,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:04,239 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:04,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:04,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1679063066, now seen corresponding path program 1 times [2021-12-28 03:48:04,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:04,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257255764] [2021-12-28 03:48:04,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:04,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:04,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 03:48:04,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:04,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:48:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:48:04,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:04,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257255764] [2021-12-28 03:48:04,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257255764] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:48:04,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925541416] [2021-12-28 03:48:04,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:04,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:04,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:48:04,317 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) [2021-12-28 03:48:04,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 03:48:04,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:04,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:48:04,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:48:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 03:48:04,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:48:04,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925541416] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:04,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:48:04,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-28 03:48:04,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964256376] [2021-12-28 03:48:04,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:04,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:48:04,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:04,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:48:04,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:04,715 INFO L87 Difference]: Start difference. First operand 1915 states and 2594 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 03:48:04,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:04,777 INFO L93 Difference]: Finished difference Result 1937 states and 2620 transitions. [2021-12-28 03:48:04,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:48:04,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2021-12-28 03:48:04,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:04,789 INFO L225 Difference]: With dead ends: 1937 [2021-12-28 03:48:04,789 INFO L226 Difference]: Without dead ends: 1926 [2021-12-28 03:48:04,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:04,791 INFO L933 BasicCegarLoop]: 680 mSDtfsCounter, 663 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 693 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 [2021-12-28 03:48:04,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [663 Valid, 693 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:48:04,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-12-28 03:48:04,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1915. [2021-12-28 03:48:04,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1336 states have (on average 1.313622754491018) internal successors, (1755), 1361 states have internal predecessors, (1755), 422 states have call successors, (422), 157 states have call predecessors, (422), 156 states have return successors, (416), 416 states have call predecessors, (416), 416 states have call successors, (416) [2021-12-28 03:48:04,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 2593 transitions. [2021-12-28 03:48:04,899 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 2593 transitions. Word has length 43 [2021-12-28 03:48:04,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:04,900 INFO L470 AbstractCegarLoop]: Abstraction has 1915 states and 2593 transitions. [2021-12-28 03:48:04,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 03:48:04,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 2593 transitions. [2021-12-28 03:48:04,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-28 03:48:04,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:04,902 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, 1, 1, 1, 1, 1] [2021-12-28 03:48:04,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 03:48:05,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:05,120 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:05,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:05,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1736321368, now seen corresponding path program 1 times [2021-12-28 03:48:05,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:05,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495835215] [2021-12-28 03:48:05,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:05,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:05,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 03:48:05,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:05,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:48:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:05,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:48:05,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:05,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495835215] [2021-12-28 03:48:05,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495835215] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:48:05,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295094809] [2021-12-28 03:48:05,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:05,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:05,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:48:05,205 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) [2021-12-28 03:48:05,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 03:48:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:05,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:48:05,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:48:05,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 03:48:05,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:48:05,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295094809] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:05,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:48:05,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-28 03:48:05,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726133722] [2021-12-28 03:48:05,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:05,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:48:05,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:05,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:48:05,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:05,589 INFO L87 Difference]: Start difference. First operand 1915 states and 2593 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 03:48:05,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:05,649 INFO L93 Difference]: Finished difference Result 1917 states and 2594 transitions. [2021-12-28 03:48:05,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:48:05,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2021-12-28 03:48:05,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:05,659 INFO L225 Difference]: With dead ends: 1917 [2021-12-28 03:48:05,659 INFO L226 Difference]: Without dead ends: 1914 [2021-12-28 03:48:05,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:05,661 INFO L933 BasicCegarLoop]: 665 mSDtfsCounter, 626 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 665 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 [2021-12-28 03:48:05,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [626 Valid, 665 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:48:05,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2021-12-28 03:48:05,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 1914. [2021-12-28 03:48:05,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1336 states have (on average 1.312874251497006) internal successors, (1754), 1360 states have internal predecessors, (1754), 421 states have call successors, (421), 157 states have call predecessors, (421), 156 states have return successors, (416), 416 states have call predecessors, (416), 416 states have call successors, (416) [2021-12-28 03:48:05,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 2591 transitions. [2021-12-28 03:48:05,752 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 2591 transitions. Word has length 43 [2021-12-28 03:48:05,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:05,752 INFO L470 AbstractCegarLoop]: Abstraction has 1914 states and 2591 transitions. [2021-12-28 03:48:05,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 03:48:05,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 2591 transitions. [2021-12-28 03:48:05,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-28 03:48:05,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:05,754 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, 1, 1, 1, 1, 1, 1] [2021-12-28 03:48:05,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 03:48:05,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:05,973 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:05,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:05,974 INFO L85 PathProgramCache]: Analyzing trace with hash -2008913752, now seen corresponding path program 1 times [2021-12-28 03:48:05,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:05,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675133442] [2021-12-28 03:48:05,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:05,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:06,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:06,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 03:48:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:06,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:48:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:48:06,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:06,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675133442] [2021-12-28 03:48:06,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675133442] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:48:06,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541013051] [2021-12-28 03:48:06,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:06,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:06,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:48:06,063 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) [2021-12-28 03:48:06,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 03:48:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:06,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:48:06,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:48:06,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 03:48:06,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:48:06,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541013051] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:06,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:48:06,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-28 03:48:06,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133140750] [2021-12-28 03:48:06,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:06,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:48:06,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:06,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:48:06,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:06,464 INFO L87 Difference]: Start difference. First operand 1914 states and 2591 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 03:48:06,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:06,532 INFO L93 Difference]: Finished difference Result 1916 states and 2592 transitions. [2021-12-28 03:48:06,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:48:06,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2021-12-28 03:48:06,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:06,544 INFO L225 Difference]: With dead ends: 1916 [2021-12-28 03:48:06,567 INFO L226 Difference]: Without dead ends: 1913 [2021-12-28 03:48:06,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:06,569 INFO L933 BasicCegarLoop]: 663 mSDtfsCounter, 623 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 663 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 [2021-12-28 03:48:06,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 663 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:48:06,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-12-28 03:48:06,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1913. [2021-12-28 03:48:06,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1913 states, 1336 states have (on average 1.312125748502994) internal successors, (1753), 1359 states have internal predecessors, (1753), 420 states have call successors, (420), 157 states have call predecessors, (420), 156 states have return successors, (416), 416 states have call predecessors, (416), 416 states have call successors, (416) [2021-12-28 03:48:06,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 2589 transitions. [2021-12-28 03:48:06,642 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 2589 transitions. Word has length 44 [2021-12-28 03:48:06,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:06,643 INFO L470 AbstractCegarLoop]: Abstraction has 1913 states and 2589 transitions. [2021-12-28 03:48:06,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 03:48:06,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 2589 transitions. [2021-12-28 03:48:06,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-28 03:48:06,644 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:06,644 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:48:06,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 03:48:06,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:06,859 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:06,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:06,860 INFO L85 PathProgramCache]: Analyzing trace with hash -2147080613, now seen corresponding path program 1 times [2021-12-28 03:48:06,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:06,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13444900] [2021-12-28 03:48:06,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:06,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:06,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:06,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 03:48:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:06,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:48:06,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:06,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:48:06,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:06,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13444900] [2021-12-28 03:48:06,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13444900] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:48:06,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714006201] [2021-12-28 03:48:06,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:06,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:06,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:48:06,941 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) [2021-12-28 03:48:06,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 03:48:07,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:07,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:48:07,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:48:07,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 03:48:07,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:48:07,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714006201] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:07,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:48:07,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-28 03:48:07,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503037273] [2021-12-28 03:48:07,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:07,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:48:07,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:07,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:48:07,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:07,326 INFO L87 Difference]: Start difference. First operand 1913 states and 2589 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 03:48:07,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:07,405 INFO L93 Difference]: Finished difference Result 1915 states and 2590 transitions. [2021-12-28 03:48:07,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:48:07,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2021-12-28 03:48:07,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:07,415 INFO L225 Difference]: With dead ends: 1915 [2021-12-28 03:48:07,415 INFO L226 Difference]: Without dead ends: 1912 [2021-12-28 03:48:07,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:07,416 INFO L933 BasicCegarLoop]: 661 mSDtfsCounter, 620 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 661 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 [2021-12-28 03:48:07,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 661 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:48:07,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2021-12-28 03:48:07,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 1912. [2021-12-28 03:48:07,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1336 states have (on average 1.311377245508982) internal successors, (1752), 1358 states have internal predecessors, (1752), 419 states have call successors, (419), 157 states have call predecessors, (419), 156 states have return successors, (416), 416 states have call predecessors, (416), 416 states have call successors, (416) [2021-12-28 03:48:07,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 2587 transitions. [2021-12-28 03:48:07,492 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 2587 transitions. Word has length 45 [2021-12-28 03:48:07,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:07,492 INFO L470 AbstractCegarLoop]: Abstraction has 1912 states and 2587 transitions. [2021-12-28 03:48:07,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 03:48:07,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 2587 transitions. [2021-12-28 03:48:07,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-28 03:48:07,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:07,493 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:48:07,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 03:48:07,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:07,711 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:07,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:07,712 INFO L85 PathProgramCache]: Analyzing trace with hash -2135281141, now seen corresponding path program 1 times [2021-12-28 03:48:07,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:07,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733272777] [2021-12-28 03:48:07,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:07,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:07,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 03:48:07,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:07,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:48:07,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:07,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:48:07,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:07,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733272777] [2021-12-28 03:48:07,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733272777] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:48:07,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542250139] [2021-12-28 03:48:07,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:07,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:07,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:48:07,783 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) [2021-12-28 03:48:07,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 03:48:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:08,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 1119 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:48:08,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:48:08,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 03:48:08,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:48:08,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542250139] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:08,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:48:08,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-28 03:48:08,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163106362] [2021-12-28 03:48:08,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:08,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:48:08,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:08,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:48:08,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:08,170 INFO L87 Difference]: Start difference. First operand 1912 states and 2587 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 03:48:08,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:08,274 INFO L93 Difference]: Finished difference Result 2299 states and 3086 transitions. [2021-12-28 03:48:08,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:48:08,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2021-12-28 03:48:08,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:08,286 INFO L225 Difference]: With dead ends: 2299 [2021-12-28 03:48:08,286 INFO L226 Difference]: Without dead ends: 2267 [2021-12-28 03:48:08,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:08,289 INFO L933 BasicCegarLoop]: 896 mSDtfsCounter, 555 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 1200 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 [2021-12-28 03:48:08,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [555 Valid, 1200 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:48:08,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2021-12-28 03:48:08,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 2267. [2021-12-28 03:48:08,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 1564 states have (on average 1.2979539641943734) internal successors, (2030), 1588 states have internal predecessors, (2030), 508 states have call successors, (508), 195 states have call predecessors, (508), 194 states have return successors, (507), 507 states have call predecessors, (507), 507 states have call successors, (507) [2021-12-28 03:48:08,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 3045 transitions. [2021-12-28 03:48:08,413 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 3045 transitions. Word has length 46 [2021-12-28 03:48:08,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:08,414 INFO L470 AbstractCegarLoop]: Abstraction has 2267 states and 3045 transitions. [2021-12-28 03:48:08,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 03:48:08,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 3045 transitions. [2021-12-28 03:48:08,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-28 03:48:08,422 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:08,422 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] [2021-12-28 03:48:08,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-28 03:48:08,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-28 03:48:08,640 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:08,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:08,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1978167230, now seen corresponding path program 1 times [2021-12-28 03:48:08,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:08,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43977508] [2021-12-28 03:48:08,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:08,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:08,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 03:48:08,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:08,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:48:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:08,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:48:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:08,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 03:48:08,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:48:08,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:08,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43977508] [2021-12-28 03:48:08,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43977508] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:48:08,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003320230] [2021-12-28 03:48:08,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:08,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:08,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:48:08,734 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:48:08,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 03:48:09,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:09,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 03:48:09,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:48:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 03:48:09,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:48:09,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003320230] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:09,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:48:09,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-28 03:48:09,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566032998] [2021-12-28 03:48:09,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:09,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:48:09,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:09,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:48:09,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:48:09,104 INFO L87 Difference]: Start difference. First operand 2267 states and 3045 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2021-12-28 03:48:09,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:09,302 INFO L93 Difference]: Finished difference Result 5808 states and 7772 transitions. [2021-12-28 03:48:09,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:48:09,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 64 [2021-12-28 03:48:09,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:09,320 INFO L225 Difference]: With dead ends: 5808 [2021-12-28 03:48:09,320 INFO L226 Difference]: Without dead ends: 3544 [2021-12-28 03:48:09,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:48:09,328 INFO L933 BasicCegarLoop]: 703 mSDtfsCounter, 580 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:48:09,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [580 Valid, 1276 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:48:09,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3544 states. [2021-12-28 03:48:09,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3544 to 3541. [2021-12-28 03:48:09,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3541 states, 2444 states have (on average 1.2925531914893618) internal successors, (3159), 2480 states have internal predecessors, (3159), 779 states have call successors, (779), 318 states have call predecessors, (779), 317 states have return successors, (778), 778 states have call predecessors, (778), 778 states have call successors, (778) [2021-12-28 03:48:09,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 4716 transitions. [2021-12-28 03:48:09,474 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 4716 transitions. Word has length 64 [2021-12-28 03:48:09,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:09,475 INFO L470 AbstractCegarLoop]: Abstraction has 3541 states and 4716 transitions. [2021-12-28 03:48:09,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2021-12-28 03:48:09,475 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 4716 transitions. [2021-12-28 03:48:09,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-28 03:48:09,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:09,480 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:48:09,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-28 03:48:09,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-28 03:48:09,699 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:09,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:09,700 INFO L85 PathProgramCache]: Analyzing trace with hash -2028751977, now seen corresponding path program 1 times [2021-12-28 03:48:09,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:09,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544830164] [2021-12-28 03:48:09,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:09,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:09,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 03:48:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:09,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:48:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:09,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 03:48:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:09,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 03:48:09,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:09,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 03:48:09,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:09,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:09,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:09,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:09,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:09,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:48:09,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:09,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:48:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:09,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:09,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:09,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:09,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:09,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:48:09,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:09,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-28 03:48:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:09,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:48:09,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:09,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544830164] [2021-12-28 03:48:09,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544830164] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:48:09,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569006510] [2021-12-28 03:48:09,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:09,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:09,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:48:09,931 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:48:09,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-28 03:48:10,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:10,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 1771 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:48:10,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:48:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 03:48:10,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:48:10,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569006510] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:10,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:48:10,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2021-12-28 03:48:10,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257995631] [2021-12-28 03:48:10,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:10,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:48:10,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:10,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:48:10,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:48:10,543 INFO L87 Difference]: Start difference. First operand 3541 states and 4716 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-28 03:48:10,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:10,680 INFO L93 Difference]: Finished difference Result 7127 states and 9636 transitions. [2021-12-28 03:48:10,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:48:10,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 123 [2021-12-28 03:48:10,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:10,700 INFO L225 Difference]: With dead ends: 7127 [2021-12-28 03:48:10,700 INFO L226 Difference]: Without dead ends: 3589 [2021-12-28 03:48:10,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:48:10,715 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 3 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:48:10,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 1257 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:48:10,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3589 states. [2021-12-28 03:48:10,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3589 to 3553. [2021-12-28 03:48:10,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3553 states, 2456 states have (on average 1.2911237785016287) internal successors, (3171), 2492 states have internal predecessors, (3171), 779 states have call successors, (779), 318 states have call predecessors, (779), 317 states have return successors, (778), 778 states have call predecessors, (778), 778 states have call successors, (778) [2021-12-28 03:48:10,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3553 states to 3553 states and 4728 transitions. [2021-12-28 03:48:10,884 INFO L78 Accepts]: Start accepts. Automaton has 3553 states and 4728 transitions. Word has length 123 [2021-12-28 03:48:10,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:10,885 INFO L470 AbstractCegarLoop]: Abstraction has 3553 states and 4728 transitions. [2021-12-28 03:48:10,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-28 03:48:10,885 INFO L276 IsEmpty]: Start isEmpty. Operand 3553 states and 4728 transitions. [2021-12-28 03:48:10,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-28 03:48:10,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:10,892 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:48:10,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-28 03:48:11,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-28 03:48:11,111 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:11,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:11,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1338585422, now seen corresponding path program 1 times [2021-12-28 03:48:11,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:11,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692689076] [2021-12-28 03:48:11,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:11,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:11,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 03:48:11,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:11,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:48:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:11,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 03:48:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:11,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 03:48:11,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:11,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 03:48:11,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:11,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:11,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:11,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:11,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:11,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:11,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:11,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:48:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:11,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:48:11,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:11,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:11,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:11,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:11,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:48:11,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:11,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-28 03:48:11,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:11,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 03:48:11,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:11,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:11,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:11,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:11,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:11,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:48:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:11,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:48:11,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:11,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:11,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:11,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:11,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:48:11,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:11,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-28 03:48:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:11,506 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-28 03:48:11,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:11,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692689076] [2021-12-28 03:48:11,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692689076] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:48:11,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837442581] [2021-12-28 03:48:11,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:11,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:11,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:48:11,509 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:48:11,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-28 03:48:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:12,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:48:12,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:48:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-28 03:48:12,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:48:12,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837442581] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:12,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:48:12,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2021-12-28 03:48:12,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683330945] [2021-12-28 03:48:12,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:12,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:48:12,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:12,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:48:12,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:48:12,292 INFO L87 Difference]: Start difference. First operand 3553 states and 4728 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-12-28 03:48:12,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:12,594 INFO L93 Difference]: Finished difference Result 7151 states and 9645 transitions. [2021-12-28 03:48:12,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:48:12,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) Word has length 173 [2021-12-28 03:48:12,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:12,610 INFO L225 Difference]: With dead ends: 7151 [2021-12-28 03:48:12,610 INFO L226 Difference]: Without dead ends: 3601 [2021-12-28 03:48:12,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:48:12,625 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 3 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:48:12,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 1259 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 03:48:12,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3601 states. [2021-12-28 03:48:12,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3601 to 3565. [2021-12-28 03:48:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3565 states, 2468 states have (on average 1.289708265802269) internal successors, (3183), 2504 states have internal predecessors, (3183), 779 states have call successors, (779), 318 states have call predecessors, (779), 317 states have return successors, (778), 778 states have call predecessors, (778), 778 states have call successors, (778) [2021-12-28 03:48:12,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 4740 transitions. [2021-12-28 03:48:12,773 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 4740 transitions. Word has length 173 [2021-12-28 03:48:12,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:12,773 INFO L470 AbstractCegarLoop]: Abstraction has 3565 states and 4740 transitions. [2021-12-28 03:48:12,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-12-28 03:48:12,774 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 4740 transitions. [2021-12-28 03:48:12,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-28 03:48:12,780 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:12,780 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:48:12,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-28 03:48:13,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-28 03:48:13,003 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:13,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:13,004 INFO L85 PathProgramCache]: Analyzing trace with hash -350358320, now seen corresponding path program 1 times [2021-12-28 03:48:13,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:13,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967609165] [2021-12-28 03:48:13,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:13,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:13,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:13,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 03:48:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:13,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:48:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:13,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 03:48:13,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:13,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 03:48:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:13,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 03:48:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:13,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:13,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:13,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:13,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:13,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:13,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:48:13,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:13,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:48:13,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:13,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:13,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:13,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:13,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:13,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:48:13,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:13,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-28 03:48:13,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:13,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 03:48:13,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:13,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:13,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:13,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:13,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:13,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:48:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:13,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:48:13,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:13,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:13,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:13,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:13,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:13,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:48:13,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:13,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-28 03:48:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-28 03:48:13,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:13,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967609165] [2021-12-28 03:48:13,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967609165] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:48:13,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833606902] [2021-12-28 03:48:13,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:13,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:13,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:48:13,399 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:48:13,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-28 03:48:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:13,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 2181 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:48:13,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:48:14,174 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-28 03:48:14,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:48:14,590 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-28 03:48:14,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833606902] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:48:14,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:48:14,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 12 [2021-12-28 03:48:14,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697409315] [2021-12-28 03:48:14,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:48:14,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 03:48:14,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:14,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 03:48:14,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-28 03:48:14,592 INFO L87 Difference]: Start difference. First operand 3565 states and 4740 transitions. Second operand has 12 states, 12 states have (on average 14.166666666666666) internal successors, (170), 9 states have internal predecessors, (170), 2 states have call successors, (42), 4 states have call predecessors, (42), 3 states have return successors, (40), 3 states have call predecessors, (40), 2 states have call successors, (40) [2021-12-28 03:48:17,479 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:48:27,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:27,101 INFO L93 Difference]: Finished difference Result 7452 states and 10144 transitions. [2021-12-28 03:48:27,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 03:48:27,101 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 14.166666666666666) internal successors, (170), 9 states have internal predecessors, (170), 2 states have call successors, (42), 4 states have call predecessors, (42), 3 states have return successors, (40), 3 states have call predecessors, (40), 2 states have call successors, (40) Word has length 173 [2021-12-28 03:48:27,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:27,115 INFO L225 Difference]: With dead ends: 7452 [2021-12-28 03:48:27,116 INFO L226 Difference]: Without dead ends: 3890 [2021-12-28 03:48:27,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-12-28 03:48:27,132 INFO L933 BasicCegarLoop]: 531 mSDtfsCounter, 470 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 2553 mSolverCounterSat, 304 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 1877 SdHoareTripleChecker+Invalid, 2858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 2553 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:48:27,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 1877 Invalid, 2858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 2553 Invalid, 1 Unknown, 0 Unchecked, 12.2s Time] [2021-12-28 03:48:27,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3890 states. [2021-12-28 03:48:27,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3890 to 3739. [2021-12-28 03:48:27,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3739 states, 2630 states have (on average 1.2889733840304183) internal successors, (3390), 2666 states have internal predecessors, (3390), 779 states have call successors, (779), 318 states have call predecessors, (779), 329 states have return successors, (826), 790 states have call predecessors, (826), 778 states have call successors, (826) [2021-12-28 03:48:27,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 4995 transitions. [2021-12-28 03:48:27,344 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 4995 transitions. Word has length 173 [2021-12-28 03:48:27,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:27,344 INFO L470 AbstractCegarLoop]: Abstraction has 3739 states and 4995 transitions. [2021-12-28 03:48:27,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.166666666666666) internal successors, (170), 9 states have internal predecessors, (170), 2 states have call successors, (42), 4 states have call predecessors, (42), 3 states have return successors, (40), 3 states have call predecessors, (40), 2 states have call successors, (40) [2021-12-28 03:48:27,345 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 4995 transitions. [2021-12-28 03:48:27,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-12-28 03:48:27,352 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:27,353 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:48:27,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-28 03:48:27,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-28 03:48:27,564 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:27,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:27,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1079721146, now seen corresponding path program 1 times [2021-12-28 03:48:27,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:27,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799111395] [2021-12-28 03:48:27,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:27,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:27,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:48:27,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:27,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 03:48:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:27,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 03:48:27,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:27,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-28 03:48:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:27,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 03:48:27,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:27,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:27,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:27,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:27,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:27,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:27,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:48:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:27,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:48:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:27,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:27,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:27,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:27,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:48:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:27,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 03:48:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:27,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-28 03:48:27,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:27,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:48:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:27,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:27,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:28,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 03:48:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:28,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 03:48:28,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:28,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-28 03:48:28,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:28,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:28,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:28,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:48:28,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:28,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:48:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:28,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:28,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:28,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:28,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 03:48:28,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:28,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:28,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-28 03:48:28,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:28,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:28,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:28,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:48:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:28,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:28,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 03:48:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:28,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 03:48:28,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-12-28 03:48:28,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:28,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799111395] [2021-12-28 03:48:28,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799111395] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:48:28,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227777146] [2021-12-28 03:48:28,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:28,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:28,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:48:28,116 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:48:28,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-28 03:48:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:28,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 2664 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 03:48:28,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:48:29,095 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-12-28 03:48:29,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:48:29,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227777146] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:29,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:48:29,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2021-12-28 03:48:29,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015448709] [2021-12-28 03:48:29,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:29,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:48:29,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:29,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:48:29,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:48:29,098 INFO L87 Difference]: Start difference. First operand 3739 states and 4995 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-12-28 03:48:29,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:29,288 INFO L93 Difference]: Finished difference Result 7679 states and 10587 transitions. [2021-12-28 03:48:29,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:48:29,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 251 [2021-12-28 03:48:29,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:29,304 INFO L225 Difference]: With dead ends: 7679 [2021-12-28 03:48:29,304 INFO L226 Difference]: Without dead ends: 3943 [2021-12-28 03:48:29,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:48:29,321 INFO L933 BasicCegarLoop]: 642 mSDtfsCounter, 6 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1271 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:48:29,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 1271 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:48:29,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3943 states. [2021-12-28 03:48:29,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3943 to 3871. [2021-12-28 03:48:29,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3871 states, 2714 states have (on average 1.2888725128960943) internal successors, (3498), 2738 states have internal predecessors, (3498), 827 states have call successors, (827), 318 states have call predecessors, (827), 329 states have return successors, (874), 838 states have call predecessors, (874), 826 states have call successors, (874) [2021-12-28 03:48:29,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3871 states to 3871 states and 5199 transitions. [2021-12-28 03:48:29,503 INFO L78 Accepts]: Start accepts. Automaton has 3871 states and 5199 transitions. Word has length 251 [2021-12-28 03:48:29,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:29,503 INFO L470 AbstractCegarLoop]: Abstraction has 3871 states and 5199 transitions. [2021-12-28 03:48:29,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-12-28 03:48:29,504 INFO L276 IsEmpty]: Start isEmpty. Operand 3871 states and 5199 transitions. [2021-12-28 03:48:29,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-12-28 03:48:29,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:29,512 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:48:29,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-28 03:48:29,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-28 03:48:29,726 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:29,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:29,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1369878984, now seen corresponding path program 1 times [2021-12-28 03:48:29,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:29,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303028667] [2021-12-28 03:48:29,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:29,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:29,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:48:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:29,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 03:48:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:29,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 03:48:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:29,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-28 03:48:29,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:29,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 03:48:29,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:29,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:30,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:48:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:48:30,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:30,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:48:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 03:48:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-28 03:48:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:48:30,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 03:48:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 03:48:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-28 03:48:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:48:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:48:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:30,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:30,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 03:48:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:30,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-28 03:48:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:48:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 03:48:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 03:48:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-12-28 03:48:30,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:30,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303028667] [2021-12-28 03:48:30,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303028667] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:48:30,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573258358] [2021-12-28 03:48:30,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:30,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:30,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:48:30,281 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:48:30,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-28 03:48:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:30,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 2664 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:48:30,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:48:31,306 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-12-28 03:48:31,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:48:31,841 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-12-28 03:48:31,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573258358] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:48:31,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:48:31,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 12 [2021-12-28 03:48:31,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809580017] [2021-12-28 03:48:31,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:48:31,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 03:48:31,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:31,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 03:48:31,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-28 03:48:31,843 INFO L87 Difference]: Start difference. First operand 3871 states and 5199 transitions. Second operand has 12 states, 12 states have (on average 16.0) internal successors, (192), 9 states have internal predecessors, (192), 5 states have call successors, (60), 4 states have call predecessors, (60), 3 states have return successors, (58), 6 states have call predecessors, (58), 5 states have call successors, (58) [2021-12-28 03:48:34,456 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:48:45,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:45,597 INFO L93 Difference]: Finished difference Result 8199 states and 11281 transitions. [2021-12-28 03:48:45,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 03:48:45,597 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 16.0) internal successors, (192), 9 states have internal predecessors, (192), 5 states have call successors, (60), 4 states have call predecessors, (60), 3 states have return successors, (58), 6 states have call predecessors, (58), 5 states have call successors, (58) Word has length 251 [2021-12-28 03:48:45,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:45,612 INFO L225 Difference]: With dead ends: 8199 [2021-12-28 03:48:45,613 INFO L226 Difference]: Without dead ends: 4331 [2021-12-28 03:48:45,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 572 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-12-28 03:48:45,627 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 469 mSDsluCounter, 1751 mSDsCounter, 0 mSdLazyCounter, 3545 mSolverCounterSat, 326 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 2296 SdHoareTripleChecker+Invalid, 3872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 3545 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2021-12-28 03:48:45,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 2296 Invalid, 3872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 3545 Invalid, 1 Unknown, 0 Unchecked, 13.5s Time] [2021-12-28 03:48:45,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4331 states. [2021-12-28 03:48:45,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4331 to 4186. [2021-12-28 03:48:45,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4186 states, 2954 states have (on average 1.2857142857142858) internal successors, (3798), 2966 states have internal predecessors, (3798), 902 states have call successors, (902), 318 states have call predecessors, (902), 329 states have return successors, (949), 925 states have call predecessors, (949), 901 states have call successors, (949) [2021-12-28 03:48:45,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4186 states to 4186 states and 5649 transitions. [2021-12-28 03:48:45,886 INFO L78 Accepts]: Start accepts. Automaton has 4186 states and 5649 transitions. Word has length 251 [2021-12-28 03:48:45,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:45,886 INFO L470 AbstractCegarLoop]: Abstraction has 4186 states and 5649 transitions. [2021-12-28 03:48:45,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.0) internal successors, (192), 9 states have internal predecessors, (192), 5 states have call successors, (60), 4 states have call predecessors, (60), 3 states have return successors, (58), 6 states have call predecessors, (58), 5 states have call successors, (58) [2021-12-28 03:48:45,887 INFO L276 IsEmpty]: Start isEmpty. Operand 4186 states and 5649 transitions. [2021-12-28 03:48:45,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-12-28 03:48:45,895 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:45,895 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 6, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:48:45,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-28 03:48:46,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:46,118 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:46,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:46,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1563783096, now seen corresponding path program 1 times [2021-12-28 03:48:46,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:46,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858558666] [2021-12-28 03:48:46,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:46,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:48:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-28 03:48:46,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-28 03:48:46,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-28 03:48:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 03:48:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:46,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:48:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:48:46,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:48:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 03:48:46,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 03:48:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 03:48:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-28 03:48:46,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-28 03:48:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:46,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:48:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:48:46,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:46,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:48:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 03:48:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 03:48:46,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 03:48:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-28 03:48:46,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:46,548 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-12-28 03:48:46,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:46,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858558666] [2021-12-28 03:48:46,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858558666] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:48:46,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795470883] [2021-12-28 03:48:46,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:46,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:46,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:48:46,550 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:48:46,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-28 03:48:47,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:47,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 2634 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:48:47,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:48:47,758 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-12-28 03:48:47,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:48:47,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795470883] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:47,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:48:47,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2021-12-28 03:48:47,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936732178] [2021-12-28 03:48:47,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:47,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:48:47,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:47,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:48:47,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:48:47,760 INFO L87 Difference]: Start difference. First operand 4186 states and 5649 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-28 03:48:47,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:47,936 INFO L93 Difference]: Finished difference Result 8384 states and 11315 transitions. [2021-12-28 03:48:47,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 03:48:47,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 255 [2021-12-28 03:48:47,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:47,954 INFO L225 Difference]: With dead ends: 8384 [2021-12-28 03:48:47,955 INFO L226 Difference]: Without dead ends: 4186 [2021-12-28 03:48:47,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-28 03:48:47,966 INFO L933 BasicCegarLoop]: 631 mSDtfsCounter, 3 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1886 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:48:47,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 1886 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:48:47,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4186 states. [2021-12-28 03:48:48,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4186 to 4186. [2021-12-28 03:48:48,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4186 states, 2954 states have (on average 1.2840216655382533) internal successors, (3793), 2966 states have internal predecessors, (3793), 902 states have call successors, (902), 318 states have call predecessors, (902), 329 states have return successors, (949), 925 states have call predecessors, (949), 901 states have call successors, (949) [2021-12-28 03:48:48,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4186 states to 4186 states and 5644 transitions. [2021-12-28 03:48:48,149 INFO L78 Accepts]: Start accepts. Automaton has 4186 states and 5644 transitions. Word has length 255 [2021-12-28 03:48:48,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:48,149 INFO L470 AbstractCegarLoop]: Abstraction has 4186 states and 5644 transitions. [2021-12-28 03:48:48,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-28 03:48:48,149 INFO L276 IsEmpty]: Start isEmpty. Operand 4186 states and 5644 transitions. [2021-12-28 03:48:48,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-12-28 03:48:48,158 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:48,158 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 6, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:48:48,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-28 03:48:48,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:48,379 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:48,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:48,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1419230017, now seen corresponding path program 1 times [2021-12-28 03:48:48,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:48,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093097845] [2021-12-28 03:48:48,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:48,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:48:48,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-28 03:48:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-28 03:48:48,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-28 03:48:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-28 03:48:48,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:48:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:48:48,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:48,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:48,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:48:48,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 03:48:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 03:48:48,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 03:48:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-28 03:48:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-28 03:48:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:48,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:48,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:48:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:48:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:48:48,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 03:48:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 03:48:48,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:48,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 03:48:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-28 03:48:48,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:48,853 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-12-28 03:48:48,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:48,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093097845] [2021-12-28 03:48:48,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093097845] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:48:48,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158129371] [2021-12-28 03:48:48,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:48,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:48,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:48:48,855 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:48:48,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-28 03:48:49,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:49,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 2663 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 03:48:49,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:48:49,906 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-12-28 03:48:49,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:48:49,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158129371] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:49,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:48:49,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 03:48:49,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047059556] [2021-12-28 03:48:49,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:49,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:48:49,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:49,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:48:49,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:48:49,909 INFO L87 Difference]: Start difference. First operand 4186 states and 5644 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-28 03:48:50,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:50,056 INFO L93 Difference]: Finished difference Result 8434 states and 11380 transitions. [2021-12-28 03:48:50,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:48:50,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 259 [2021-12-28 03:48:50,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:50,073 INFO L225 Difference]: With dead ends: 8434 [2021-12-28 03:48:50,074 INFO L226 Difference]: Without dead ends: 4251 [2021-12-28 03:48:50,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:48:50,085 INFO L933 BasicCegarLoop]: 628 mSDtfsCounter, 9 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:48:50,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1247 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:48:50,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2021-12-28 03:48:50,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 4201. [2021-12-28 03:48:50,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4201 states, 2969 states have (on average 1.2825867295385651) internal successors, (3808), 2981 states have internal predecessors, (3808), 902 states have call successors, (902), 318 states have call predecessors, (902), 329 states have return successors, (949), 925 states have call predecessors, (949), 901 states have call successors, (949) [2021-12-28 03:48:50,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4201 states to 4201 states and 5659 transitions. [2021-12-28 03:48:50,339 INFO L78 Accepts]: Start accepts. Automaton has 4201 states and 5659 transitions. Word has length 259 [2021-12-28 03:48:50,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:50,340 INFO L470 AbstractCegarLoop]: Abstraction has 4201 states and 5659 transitions. [2021-12-28 03:48:50,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-28 03:48:50,340 INFO L276 IsEmpty]: Start isEmpty. Operand 4201 states and 5659 transitions. [2021-12-28 03:48:50,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-12-28 03:48:50,349 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:50,349 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 6, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:48:50,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-28 03:48:50,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:50,575 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:50,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:50,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1055314338, now seen corresponding path program 1 times [2021-12-28 03:48:50,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:50,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518609896] [2021-12-28 03:48:50,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:50,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:48:50,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-28 03:48:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 03:48:50,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 03:48:50,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-28 03:48:50,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-28 03:48:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:48:50,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:48:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 03:48:50,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-28 03:48:50,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:48:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 03:48:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 03:48:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-28 03:48:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:50,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:50,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:48:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:48:50,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:50,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:50,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 03:48:50,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:50,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-28 03:48:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:48:50,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:48:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 03:48:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 03:48:50,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:50,976 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-12-28 03:48:50,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:50,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518609896] [2021-12-28 03:48:50,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518609896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:50,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:48:50,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 03:48:50,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083691996] [2021-12-28 03:48:50,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:50,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 03:48:50,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:50,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 03:48:50,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:48:50,979 INFO L87 Difference]: Start difference. First operand 4201 states and 5659 transitions. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2021-12-28 03:48:53,363 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []