./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a31fd051 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1dc3813f801c08c10697b6f3aeaa3afb846521f0bb73d940036cc656d8340c66 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 12:47:10,897 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 12:47:10,900 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 12:47:10,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 12:47:10,946 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 12:47:10,950 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 12:47:10,951 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 12:47:10,954 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 12:47:10,956 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 12:47:10,961 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 12:47:10,962 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 12:47:10,964 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 12:47:10,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 12:47:10,967 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 12:47:10,969 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 12:47:10,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 12:47:10,971 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 12:47:10,972 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 12:47:10,973 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 12:47:10,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 12:47:10,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 12:47:10,981 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 12:47:10,982 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 12:47:10,983 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 12:47:10,990 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 12:47:10,991 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 12:47:10,991 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 12:47:10,993 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 12:47:10,993 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 12:47:10,994 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 12:47:10,994 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 12:47:10,995 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 12:47:10,997 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 12:47:10,998 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 12:47:10,999 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 12:47:10,999 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 12:47:11,000 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 12:47:11,000 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 12:47:11,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 12:47:11,001 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 12:47:11,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 12:47:11,003 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-15 12:47:11,032 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 12:47:11,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 12:47:11,033 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 12:47:11,034 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 12:47:11,034 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 12:47:11,035 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 12:47:11,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 12:47:11,035 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 12:47:11,035 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 12:47:11,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 12:47:11,037 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 12:47:11,037 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 12:47:11,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 12:47:11,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 12:47:11,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 12:47:11,037 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-15 12:47:11,038 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-15 12:47:11,038 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-15 12:47:11,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 12:47:11,038 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 12:47:11,038 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 12:47:11,038 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 12:47:11,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 12:47:11,039 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 12:47:11,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 12:47:11,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 12:47:11,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 12:47:11,039 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 12:47:11,040 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 12:47:11,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 12:47:11,040 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 12:47:11,040 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 12:47:11,041 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 12:47:11,041 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 12:47:11,041 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1dc3813f801c08c10697b6f3aeaa3afb846521f0bb73d940036cc656d8340c66 [2023-02-15 12:47:11,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 12:47:11,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 12:47:11,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 12:47:11,318 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 12:47:11,318 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 12:47:11,320 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i [2023-02-15 12:47:12,580 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 12:47:12,783 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 12:47:12,783 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i [2023-02-15 12:47:12,790 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4efbb58cd/797987c3ac9c45ae8555c9920d6fc161/FLAGdf3a2e706 [2023-02-15 12:47:12,807 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4efbb58cd/797987c3ac9c45ae8555c9920d6fc161 [2023-02-15 12:47:12,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 12:47:12,811 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 12:47:12,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 12:47:12,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 12:47:12,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 12:47:12,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:47:12" (1/1) ... [2023-02-15 12:47:12,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@380c0a84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:47:12, skipping insertion in model container [2023-02-15 12:47:12,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:47:12" (1/1) ... [2023-02-15 12:47:12,825 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 12:47:12,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 12:47:12,970 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i[817,830] [2023-02-15 12:47:12,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 12:47:12,997 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 12:47:13,011 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i[817,830] [2023-02-15 12:47:13,025 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 12:47:13,037 INFO L208 MainTranslator]: Completed translation [2023-02-15 12:47:13,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:47:13 WrapperNode [2023-02-15 12:47:13,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 12:47:13,039 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 12:47:13,039 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 12:47:13,040 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 12:47:13,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:47:13" (1/1) ... [2023-02-15 12:47:13,060 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:47:13" (1/1) ... [2023-02-15 12:47:13,079 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2023-02-15 12:47:13,080 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 12:47:13,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 12:47:13,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 12:47:13,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 12:47:13,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:47:13" (1/1) ... [2023-02-15 12:47:13,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:47:13" (1/1) ... [2023-02-15 12:47:13,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:47:13" (1/1) ... [2023-02-15 12:47:13,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:47:13" (1/1) ... [2023-02-15 12:47:13,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:47:13" (1/1) ... [2023-02-15 12:47:13,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:47:13" (1/1) ... [2023-02-15 12:47:13,115 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:47:13" (1/1) ... [2023-02-15 12:47:13,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:47:13" (1/1) ... [2023-02-15 12:47:13,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 12:47:13,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 12:47:13,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 12:47:13,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 12:47:13,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:47:13" (1/1) ... [2023-02-15 12:47:13,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 12:47:13,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:47:13,157 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) [2023-02-15 12:47:13,171 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 [2023-02-15 12:47:13,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 12:47:13,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 12:47:13,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 12:47:13,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 12:47:13,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 12:47:13,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 12:47:13,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 12:47:13,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 12:47:13,249 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 12:47:13,250 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 12:47:13,401 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 12:47:13,407 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 12:47:13,407 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 12:47:13,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:47:13 BoogieIcfgContainer [2023-02-15 12:47:13,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 12:47:13,411 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 12:47:13,411 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 12:47:13,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 12:47:13,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 12:47:12" (1/3) ... [2023-02-15 12:47:13,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f344daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:47:13, skipping insertion in model container [2023-02-15 12:47:13,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:47:13" (2/3) ... [2023-02-15 12:47:13,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f344daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:47:13, skipping insertion in model container [2023-02-15 12:47:13,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:47:13" (3/3) ... [2023-02-15 12:47:13,417 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_strcpy_ground-2.i [2023-02-15 12:47:13,432 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 12:47:13,433 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-02-15 12:47:13,506 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 12:47:13,512 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6932d93f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 12:47:13,528 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2023-02-15 12:47:13,533 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 24 states have (on average 1.875) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:13,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-15 12:47:13,538 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:13,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-15 12:47:13,539 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-15 12:47:13,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:13,552 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2023-02-15 12:47:13,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:13,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492787970] [2023-02-15 12:47:13,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:13,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:13,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:47:13,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:13,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492787970] [2023-02-15 12:47:13,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492787970] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:47:13,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:47:13,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 12:47:13,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540116068] [2023-02-15 12:47:13,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:47:13,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 12:47:13,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:13,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 12:47:13,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 12:47:13,892 INFO L87 Difference]: Start difference. First operand has 39 states, 24 states have (on average 1.875) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:13,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:47:13,943 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2023-02-15 12:47:13,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 12:47:13,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-02-15 12:47:13,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:47:13,952 INFO L225 Difference]: With dead ends: 35 [2023-02-15 12:47:13,952 INFO L226 Difference]: Without dead ends: 33 [2023-02-15 12:47:13,954 INFO L412 NwaCegarLoop]: 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 [2023-02-15 12:47:13,957 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:47:13,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 25 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:47:13,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-15 12:47:13,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-02-15 12:47:13,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:13,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2023-02-15 12:47:13,985 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 4 [2023-02-15 12:47:13,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:47:13,986 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2023-02-15 12:47:13,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:13,986 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2023-02-15 12:47:13,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-15 12:47:13,987 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:13,987 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-15 12:47:13,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 12:47:13,988 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-15 12:47:13,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:13,988 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2023-02-15 12:47:13,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:13,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526351658] [2023-02-15 12:47:13,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:13,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:14,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:47:14,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:14,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526351658] [2023-02-15 12:47:14,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526351658] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:47:14,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:47:14,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 12:47:14,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662623804] [2023-02-15 12:47:14,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:47:14,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 12:47:14,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:14,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 12:47:14,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 12:47:14,115 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:14,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:47:14,152 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2023-02-15 12:47:14,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 12:47:14,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-02-15 12:47:14,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:47:14,153 INFO L225 Difference]: With dead ends: 37 [2023-02-15 12:47:14,154 INFO L226 Difference]: Without dead ends: 37 [2023-02-15 12:47:14,154 INFO L412 NwaCegarLoop]: 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 [2023-02-15 12:47:14,155 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:47:14,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 45 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:47:14,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-15 12:47:14,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2023-02-15 12:47:14,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.48) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:14,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2023-02-15 12:47:14,167 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 4 [2023-02-15 12:47:14,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:47:14,168 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2023-02-15 12:47:14,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:14,170 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2023-02-15 12:47:14,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 12:47:14,171 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:14,171 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-02-15 12:47:14,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 12:47:14,172 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-15 12:47:14,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:14,175 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2023-02-15 12:47:14,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:14,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893005154] [2023-02-15 12:47:14,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:14,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:14,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:14,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:47:14,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:14,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893005154] [2023-02-15 12:47:14,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893005154] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:47:14,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533069208] [2023-02-15 12:47:14,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:14,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:47:14,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:47:14,337 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) [2023-02-15 12:47:14,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 12:47:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:14,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 12:47:14,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:47:14,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 12:47:14,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-02-15 12:47:14,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 12:47:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:47:14,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:47:14,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:47:14,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533069208] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:47:14,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:47:14,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-02-15 12:47:14,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653281803] [2023-02-15 12:47:14,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:47:14,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 12:47:14,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:14,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 12:47:14,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-15 12:47:14,710 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:14,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:47:14,821 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2023-02-15 12:47:14,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 12:47:14,822 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-15 12:47:14,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:47:14,824 INFO L225 Difference]: With dead ends: 48 [2023-02-15 12:47:14,824 INFO L226 Difference]: Without dead ends: 48 [2023-02-15 12:47:14,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-02-15 12:47:14,825 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:47:14,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 37 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:47:14,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-15 12:47:14,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2023-02-15 12:47:14,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:14,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2023-02-15 12:47:14,832 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 8 [2023-02-15 12:47:14,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:47:14,833 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2023-02-15 12:47:14,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:14,833 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2023-02-15 12:47:14,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 12:47:14,833 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:14,834 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-15 12:47:14,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 12:47:15,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:47:15,042 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-15 12:47:15,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:15,043 INFO L85 PathProgramCache]: Analyzing trace with hash -4646106, now seen corresponding path program 1 times [2023-02-15 12:47:15,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:15,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157928672] [2023-02-15 12:47:15,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:15,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:15,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 12:47:15,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:15,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157928672] [2023-02-15 12:47:15,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157928672] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:47:15,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100101720] [2023-02-15 12:47:15,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:15,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:47:15,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:47:15,130 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) [2023-02-15 12:47:15,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 12:47:15,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:15,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 12:47:15,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:47:15,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:47:15,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:47:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:47:15,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100101720] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:47:15,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:47:15,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2023-02-15 12:47:15,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266434989] [2023-02-15 12:47:15,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:47:15,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 12:47:15,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:15,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 12:47:15,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2023-02-15 12:47:15,269 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:15,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:47:15,486 INFO L93 Difference]: Finished difference Result 197 states and 205 transitions. [2023-02-15 12:47:15,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 12:47:15,487 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-15 12:47:15,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:47:15,488 INFO L225 Difference]: With dead ends: 197 [2023-02-15 12:47:15,489 INFO L226 Difference]: Without dead ends: 197 [2023-02-15 12:47:15,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2023-02-15 12:47:15,490 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 364 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:47:15,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 123 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:47:15,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-02-15 12:47:15,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 54. [2023-02-15 12:47:15,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 53 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:15,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2023-02-15 12:47:15,498 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 13 [2023-02-15 12:47:15,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:47:15,498 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2023-02-15 12:47:15,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:15,499 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2023-02-15 12:47:15,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 12:47:15,499 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:15,499 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2023-02-15 12:47:15,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 12:47:15,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-02-15 12:47:15,705 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-15 12:47:15,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:15,706 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2023-02-15 12:47:15,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:15,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810582293] [2023-02-15 12:47:15,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:15,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:15,914 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:47:15,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:15,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810582293] [2023-02-15 12:47:15,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810582293] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:47:15,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624110099] [2023-02-15 12:47:15,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:47:15,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:47:15,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:47:15,917 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) [2023-02-15 12:47:15,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 12:47:15,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:47:15,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:47:15,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 12:47:15,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:47:16,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 12:47:16,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-02-15 12:47:16,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 12:47:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:47:16,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 12:47:16,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624110099] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:47:16,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 12:47:16,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2023-02-15 12:47:16,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587015415] [2023-02-15 12:47:16,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:47:16,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 12:47:16,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:16,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 12:47:16,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-02-15 12:47:16,193 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:16,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:47:16,376 INFO L93 Difference]: Finished difference Result 136 states and 149 transitions. [2023-02-15 12:47:16,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 12:47:16,377 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-15 12:47:16,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:47:16,378 INFO L225 Difference]: With dead ends: 136 [2023-02-15 12:47:16,378 INFO L226 Difference]: Without dead ends: 136 [2023-02-15 12:47:16,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-02-15 12:47:16,379 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 111 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:47:16,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 172 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:47:16,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-15 12:47:16,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 53. [2023-02-15 12:47:16,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 52 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:16,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2023-02-15 12:47:16,384 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 20 [2023-02-15 12:47:16,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:47:16,384 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2023-02-15 12:47:16,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:16,384 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2023-02-15 12:47:16,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-15 12:47:16,385 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:16,385 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:47:16,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-15 12:47:16,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:47:16,592 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-15 12:47:16,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:16,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1934674516, now seen corresponding path program 1 times [2023-02-15 12:47:16,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:16,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950987155] [2023-02-15 12:47:16,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:16,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:16,646 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-15 12:47:16,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:16,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950987155] [2023-02-15 12:47:16,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950987155] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:47:16,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:47:16,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 12:47:16,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885636242] [2023-02-15 12:47:16,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:47:16,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 12:47:16,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:16,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 12:47:16,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 12:47:16,649 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:16,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:47:16,661 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2023-02-15 12:47:16,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 12:47:16,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-15 12:47:16,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:47:16,662 INFO L225 Difference]: With dead ends: 51 [2023-02-15 12:47:16,662 INFO L226 Difference]: Without dead ends: 51 [2023-02-15 12:47:16,662 INFO L412 NwaCegarLoop]: 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 [2023-02-15 12:47:16,663 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 22 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 [2023-02-15 12:47:16,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 22 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:47:16,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-15 12:47:16,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-02-15 12:47:16,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 50 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:16,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2023-02-15 12:47:16,667 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 32 [2023-02-15 12:47:16,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:47:16,668 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2023-02-15 12:47:16,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:16,668 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2023-02-15 12:47:16,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-15 12:47:16,669 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:16,669 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:47:16,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-15 12:47:16,669 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-15 12:47:16,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:16,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1934674515, now seen corresponding path program 1 times [2023-02-15 12:47:16,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:16,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370586373] [2023-02-15 12:47:16,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:16,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:16,792 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-15 12:47:16,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:16,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370586373] [2023-02-15 12:47:16,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370586373] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:47:16,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:47:16,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 12:47:16,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766503650] [2023-02-15 12:47:16,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:47:16,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 12:47:16,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:16,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 12:47:16,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 12:47:16,795 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:16,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:47:16,834 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2023-02-15 12:47:16,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 12:47:16,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-15 12:47:16,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:47:16,838 INFO L225 Difference]: With dead ends: 68 [2023-02-15 12:47:16,838 INFO L226 Difference]: Without dead ends: 68 [2023-02-15 12:47:16,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 12:47:16,840 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:47:16,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 27 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:47:16,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-15 12:47:16,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 54. [2023-02-15 12:47:16,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.1875) internal successors, (57), 53 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:16,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2023-02-15 12:47:16,851 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 32 [2023-02-15 12:47:16,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:47:16,852 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2023-02-15 12:47:16,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:16,852 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2023-02-15 12:47:16,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 12:47:16,853 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:16,853 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:47:16,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-15 12:47:16,853 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-15 12:47:16,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:16,854 INFO L85 PathProgramCache]: Analyzing trace with hash 154582664, now seen corresponding path program 1 times [2023-02-15 12:47:16,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:16,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819495493] [2023-02-15 12:47:16,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:16,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:16,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:16,905 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-15 12:47:16,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:16,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819495493] [2023-02-15 12:47:16,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819495493] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:47:16,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:47:16,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 12:47:16,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961808353] [2023-02-15 12:47:16,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:47:16,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 12:47:16,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:16,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 12:47:16,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 12:47:16,908 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:16,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:47:16,937 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2023-02-15 12:47:16,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 12:47:16,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-15 12:47:16,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:47:16,938 INFO L225 Difference]: With dead ends: 60 [2023-02-15 12:47:16,938 INFO L226 Difference]: Without dead ends: 60 [2023-02-15 12:47:16,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 12:47:16,939 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:47:16,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 51 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:47:16,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-15 12:47:16,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2023-02-15 12:47:16,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.18) internal successors, (59), 55 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:16,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2023-02-15 12:47:16,942 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 33 [2023-02-15 12:47:16,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:47:16,943 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2023-02-15 12:47:16,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:16,943 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2023-02-15 12:47:16,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-15 12:47:16,944 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:16,944 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:47:16,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-15 12:47:16,944 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-15 12:47:16,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:16,945 INFO L85 PathProgramCache]: Analyzing trace with hash 498629567, now seen corresponding path program 1 times [2023-02-15 12:47:16,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:16,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374197920] [2023-02-15 12:47:16,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:16,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:17,033 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 12:47:17,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:17,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374197920] [2023-02-15 12:47:17,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374197920] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:47:17,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183841808] [2023-02-15 12:47:17,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:17,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:47:17,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:47:17,036 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) [2023-02-15 12:47:17,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 12:47:17,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:17,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 12:47:17,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:47:17,174 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 12:47:17,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:47:17,269 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 12:47:17,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183841808] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:47:17,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:47:17,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-02-15 12:47:17,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138647695] [2023-02-15 12:47:17,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:47:17,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 12:47:17,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:17,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 12:47:17,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-02-15 12:47:17,273 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:17,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:47:17,472 INFO L93 Difference]: Finished difference Result 378 states and 393 transitions. [2023-02-15 12:47:17,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 12:47:17,473 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-02-15 12:47:17,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:47:17,475 INFO L225 Difference]: With dead ends: 378 [2023-02-15 12:47:17,475 INFO L226 Difference]: Without dead ends: 378 [2023-02-15 12:47:17,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-02-15 12:47:17,477 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 495 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:47:17,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 265 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:47:17,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2023-02-15 12:47:17,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 88. [2023-02-15 12:47:17,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.1097560975609757) internal successors, (91), 87 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:17,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2023-02-15 12:47:17,493 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 34 [2023-02-15 12:47:17,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:47:17,494 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2023-02-15 12:47:17,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:17,494 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2023-02-15 12:47:17,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-15 12:47:17,498 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:17,498 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:47:17,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 12:47:17,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:47:17,704 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-15 12:47:17,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:17,705 INFO L85 PathProgramCache]: Analyzing trace with hash -618447913, now seen corresponding path program 2 times [2023-02-15 12:47:17,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:17,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353817060] [2023-02-15 12:47:17,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:17,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:17,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:18,057 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 12:47:18,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:18,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353817060] [2023-02-15 12:47:18,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353817060] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:47:18,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228860061] [2023-02-15 12:47:18,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:47:18,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:47:18,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:47:18,059 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) [2023-02-15 12:47:18,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 12:47:18,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:47:18,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:47:18,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 12:47:18,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:47:18,256 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 12:47:18,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:47:18,646 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 12:47:18,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228860061] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:47:18,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:47:18,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-02-15 12:47:18,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730337452] [2023-02-15 12:47:18,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:47:18,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 12:47:18,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:18,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 12:47:18,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 12:47:18,649 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:19,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:47:19,220 INFO L93 Difference]: Finished difference Result 794 states and 825 transitions. [2023-02-15 12:47:19,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-15 12:47:19,222 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2023-02-15 12:47:19,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:47:19,225 INFO L225 Difference]: With dead ends: 794 [2023-02-15 12:47:19,225 INFO L226 Difference]: Without dead ends: 794 [2023-02-15 12:47:19,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 12:47:19,226 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1815 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1815 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 12:47:19,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1815 Valid, 502 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 12:47:19,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2023-02-15 12:47:19,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 152. [2023-02-15 12:47:19,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 146 states have (on average 1.0616438356164384) internal successors, (155), 151 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:19,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 155 transitions. [2023-02-15 12:47:19,255 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 155 transitions. Word has length 66 [2023-02-15 12:47:19,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:47:19,256 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 155 transitions. [2023-02-15 12:47:19,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:19,256 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 155 transitions. [2023-02-15 12:47:19,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-02-15 12:47:19,257 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:19,257 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:47:19,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 12:47:19,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 12:47:19,466 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-15 12:47:19,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:19,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1529191431, now seen corresponding path program 3 times [2023-02-15 12:47:19,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:19,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698933248] [2023-02-15 12:47:19,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:19,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:20,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 12:47:20,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:20,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698933248] [2023-02-15 12:47:20,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698933248] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:47:20,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369947628] [2023-02-15 12:47:20,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 12:47:20,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:47:20,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:47:20,441 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) [2023-02-15 12:47:20,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 12:47:20,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-15 12:47:20,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:47:20,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 12:47:20,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:47:20,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 88 proven. 1 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2023-02-15 12:47:20,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:47:21,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2023-02-15 12:47:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2023-02-15 12:47:21,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369947628] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:47:21,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:47:21,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 7, 7] total 45 [2023-02-15 12:47:21,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826500984] [2023-02-15 12:47:21,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:47:21,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-15 12:47:21,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:21,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-15 12:47:21,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=714, Invalid=1266, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 12:47:21,180 INFO L87 Difference]: Start difference. First operand 152 states and 155 transitions. Second operand has 45 states, 45 states have (on average 3.6) internal successors, (162), 45 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:23,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:47:23,302 INFO L93 Difference]: Finished difference Result 821 states and 857 transitions. [2023-02-15 12:47:23,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-02-15 12:47:23,303 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6) internal successors, (162), 45 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2023-02-15 12:47:23,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:47:23,306 INFO L225 Difference]: With dead ends: 821 [2023-02-15 12:47:23,306 INFO L226 Difference]: Without dead ends: 821 [2023-02-15 12:47:23,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2133, Invalid=3873, Unknown=0, NotChecked=0, Total=6006 [2023-02-15 12:47:23,308 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 6761 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6761 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 12:47:23,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6761 Valid, 398 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 12:47:23,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2023-02-15 12:47:23,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 313. [2023-02-15 12:47:23,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 307 states have (on average 1.231270358306189) internal successors, (378), 312 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:23,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 378 transitions. [2023-02-15 12:47:23,318 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 378 transitions. Word has length 130 [2023-02-15 12:47:23,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:47:23,319 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 378 transitions. [2023-02-15 12:47:23,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6) internal successors, (162), 45 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:23,319 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 378 transitions. [2023-02-15 12:47:23,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-02-15 12:47:23,320 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:23,320 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:47:23,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 12:47:23,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:47:23,525 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-15 12:47:23,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:23,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1547574073, now seen corresponding path program 1 times [2023-02-15 12:47:23,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:23,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742470419] [2023-02-15 12:47:23,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:23,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:23,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:24,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:47:24,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:24,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742470419] [2023-02-15 12:47:24,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742470419] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:47:24,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610651430] [2023-02-15 12:47:24,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:24,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:47:24,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:47:24,441 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) [2023-02-15 12:47:24,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 12:47:24,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:24,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-15 12:47:24,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:47:24,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:47:24,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:47:26,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:47:26,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610651430] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:47:26,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:47:26,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 67 [2023-02-15 12:47:26,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65294417] [2023-02-15 12:47:26,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:47:26,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-02-15 12:47:26,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:26,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-02-15 12:47:26,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2023-02-15 12:47:26,063 INFO L87 Difference]: Start difference. First operand 313 states and 378 transitions. Second operand has 67 states, 67 states have (on average 3.955223880597015) internal successors, (265), 67 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:28,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:47:28,116 INFO L93 Difference]: Finished difference Result 1646 states and 1711 transitions. [2023-02-15 12:47:28,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-02-15 12:47:28,117 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.955223880597015) internal successors, (265), 67 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2023-02-15 12:47:28,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:47:28,121 INFO L225 Difference]: With dead ends: 1646 [2023-02-15 12:47:28,121 INFO L226 Difference]: Without dead ends: 1646 [2023-02-15 12:47:28,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2023-02-15 12:47:28,123 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 4682 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4682 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 12:47:28,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4682 Valid, 1062 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 12:47:28,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2023-02-15 12:47:28,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 445. [2023-02-15 12:47:28,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 439 states have (on average 1.1617312072892938) internal successors, (510), 444 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:28,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 510 transitions. [2023-02-15 12:47:28,135 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 510 transitions. Word has length 134 [2023-02-15 12:47:28,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:47:28,136 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 510 transitions. [2023-02-15 12:47:28,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.955223880597015) internal successors, (265), 67 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:28,136 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 510 transitions. [2023-02-15 12:47:28,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-02-15 12:47:28,138 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:28,138 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:47:28,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 12:47:28,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:47:28,345 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-15 12:47:28,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:28,346 INFO L85 PathProgramCache]: Analyzing trace with hash 964792156, now seen corresponding path program 2 times [2023-02-15 12:47:28,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:28,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907064896] [2023-02-15 12:47:28,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:28,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:31,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:47:31,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:31,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907064896] [2023-02-15 12:47:31,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907064896] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:47:31,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208757977] [2023-02-15 12:47:31,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:47:31,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:47:31,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:47:31,469 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) [2023-02-15 12:47:31,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 12:47:31,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-15 12:47:31,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:47:31,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 12:47:31,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:47:33,067 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#src~0#1.base_23| Int) (|v_ULTIMATE.start_main_~#dst~0#1.base_17| Int) (v_ArrVal_778 Int) (v_ArrVal_777 Int) (v_ArrVal_776 Int)) (and (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#src~0#1.base_23| v_ArrVal_776) |v_ULTIMATE.start_main_~#dst~0#1.base_17|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#src~0#1.base_23|) 0) (= |c_#valid| (store (store (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#src~0#1.base_23| v_ArrVal_778) |v_ULTIMATE.start_main_~#dst~0#1.base_17| v_ArrVal_777) |v_ULTIMATE.start_main_~#src~0#1.base_23| 0) |v_ULTIMATE.start_main_~#dst~0#1.base_17| 0)))) is different from true [2023-02-15 12:47:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2023-02-15 12:47:33,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 12:47:33,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208757977] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:47:33,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 12:47:33,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [67] total 69 [2023-02-15 12:47:33,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081296054] [2023-02-15 12:47:33,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:47:33,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 12:47:33,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:33,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 12:47:33,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=2344, Unknown=1, NotChecked=132, Total=4692 [2023-02-15 12:47:33,075 INFO L87 Difference]: Start difference. First operand 445 states and 510 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:33,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:47:33,093 INFO L93 Difference]: Finished difference Result 444 states and 509 transitions. [2023-02-15 12:47:33,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 12:47:33,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2023-02-15 12:47:33,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:47:33,095 INFO L225 Difference]: With dead ends: 444 [2023-02-15 12:47:33,095 INFO L226 Difference]: Without dead ends: 440 [2023-02-15 12:47:33,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2215, Invalid=2344, Unknown=1, NotChecked=132, Total=4692 [2023-02-15 12:47:33,097 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:47:33,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 19 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 29 Unchecked, 0.0s Time] [2023-02-15 12:47:33,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2023-02-15 12:47:33,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2023-02-15 12:47:33,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.1586206896551725) internal successors, (504), 439 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:33,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 504 transitions. [2023-02-15 12:47:33,105 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 504 transitions. Word has length 266 [2023-02-15 12:47:33,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:47:33,105 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 504 transitions. [2023-02-15 12:47:33,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:33,106 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 504 transitions. [2023-02-15 12:47:33,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2023-02-15 12:47:33,108 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:33,108 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 64, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:47:33,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 12:47:33,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-15 12:47:33,315 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-15 12:47:33,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:33,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1298464006, now seen corresponding path program 1 times [2023-02-15 12:47:33,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:33,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15308947] [2023-02-15 12:47:33,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:33,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:36,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8132 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 12:47:36,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:36,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15308947] [2023-02-15 12:47:36,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15308947] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:47:36,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723870336] [2023-02-15 12:47:36,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:36,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:47:36,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:47:36,309 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) [2023-02-15 12:47:36,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 12:47:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:36,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-15 12:47:36,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:47:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8132 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 12:47:36,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:47:41,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8132 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 12:47:41,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723870336] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:47:41,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:47:41,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 133 [2023-02-15 12:47:41,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076986070] [2023-02-15 12:47:41,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:47:41,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2023-02-15 12:47:41,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:41,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2023-02-15 12:47:41,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2023-02-15 12:47:41,259 INFO L87 Difference]: Start difference. First operand 440 states and 504 transitions. Second operand has 133 states, 133 states have (on average 3.9774436090225564) internal successors, (529), 133 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:56,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:47:56,956 INFO L93 Difference]: Finished difference Result 2967 states and 3098 transitions. [2023-02-15 12:47:56,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2023-02-15 12:47:56,956 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 3.9774436090225564) internal successors, (529), 133 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 269 [2023-02-15 12:47:56,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:47:56,965 INFO L225 Difference]: With dead ends: 2967 [2023-02-15 12:47:56,965 INFO L226 Difference]: Without dead ends: 2967 [2023-02-15 12:47:56,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2023-02-15 12:47:56,969 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 10474 mSDsluCounter, 1839 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10474 SdHoareTripleChecker+Valid, 1857 SdHoareTripleChecker+Invalid, 1863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 569 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-15 12:47:56,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10474 Valid, 1857 Invalid, 1863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [569 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-15 12:47:56,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2023-02-15 12:47:56,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 704. [2023-02-15 12:47:56,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 699 states have (on average 1.0987124463519313) internal successors, (768), 703 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:56,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 768 transitions. [2023-02-15 12:47:56,989 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 768 transitions. Word has length 269 [2023-02-15 12:47:56,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:47:56,990 INFO L495 AbstractCegarLoop]: Abstraction has 704 states and 768 transitions. [2023-02-15 12:47:56,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 3.9774436090225564) internal successors, (529), 133 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:47:56,990 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 768 transitions. [2023-02-15 12:47:56,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2023-02-15 12:47:56,997 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:56,997 INFO L195 NwaCegarLoop]: trace histogram [130, 130, 130, 130, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:47:57,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 12:47:57,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-15 12:47:57,208 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-15 12:47:57,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:57,208 INFO L85 PathProgramCache]: Analyzing trace with hash 470641012, now seen corresponding path program 2 times [2023-02-15 12:47:57,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:57,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604452327] [2023-02-15 12:47:57,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:57,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:57,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:07,949 INFO L134 CoverageAnalysis]: Checked inductivity of 33674 backedges. 0 proven. 33670 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 12:48:07,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:48:07,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604452327] [2023-02-15 12:48:07,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604452327] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:48:07,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515255828] [2023-02-15 12:48:07,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:48:07,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:48:07,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:48:07,953 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) [2023-02-15 12:48:07,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 12:48:08,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-15 12:48:08,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:48:08,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 12:48:08,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:48:08,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 12:48:08,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-02-15 12:48:13,844 INFO L134 CoverageAnalysis]: Checked inductivity of 33674 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33671 trivial. 0 not checked. [2023-02-15 12:48:13,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:48:22,033 INFO L134 CoverageAnalysis]: Checked inductivity of 33674 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33671 trivial. 0 not checked. [2023-02-15 12:48:22,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515255828] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:48:22,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:48:22,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 3, 3] total 137 [2023-02-15 12:48:22,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073268343] [2023-02-15 12:48:22,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:48:22,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2023-02-15 12:48:22,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:48:22,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2023-02-15 12:48:22,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8788, Invalid=9844, Unknown=0, NotChecked=0, Total=18632 [2023-02-15 12:48:22,042 INFO L87 Difference]: Start difference. First operand 704 states and 768 transitions. Second operand has 137 states, 137 states have (on average 4.102189781021898) internal successors, (562), 137 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:49:00,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:49:00,377 INFO L93 Difference]: Finished difference Result 2867 states and 3000 transitions. [2023-02-15 12:49:00,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 267 states. [2023-02-15 12:49:00,377 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 4.102189781021898) internal successors, (562), 137 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 533 [2023-02-15 12:49:00,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:49:00,385 INFO L225 Difference]: With dead ends: 2867 [2023-02-15 12:49:00,386 INFO L226 Difference]: Without dead ends: 2867 [2023-02-15 12:49:00,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1461 GetRequests, 1062 SyntacticMatches, 0 SemanticMatches, 399 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43620 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=53602, Invalid=106798, Unknown=0, NotChecked=0, Total=160400 [2023-02-15 12:49:00,397 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 14940 mSDsluCounter, 1317 mSDsCounter, 0 mSdLazyCounter, 1709 mSolverCounterSat, 918 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14940 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 2627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 1709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:49:00,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14940 Valid, 1330 Invalid, 2627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [918 Valid, 1709 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-02-15 12:49:00,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2023-02-15 12:49:00,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 707. [2023-02-15 12:49:00,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 703 states have (on average 1.0526315789473684) internal successors, (740), 706 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:49:00,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 740 transitions. [2023-02-15 12:49:00,413 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 740 transitions. Word has length 533 [2023-02-15 12:49:00,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:49:00,414 INFO L495 AbstractCegarLoop]: Abstraction has 707 states and 740 transitions. [2023-02-15 12:49:00,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 4.102189781021898) internal successors, (562), 137 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:49:00,415 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 740 transitions. [2023-02-15 12:49:00,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2023-02-15 12:49:00,423 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:49:00,423 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 131, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:49:00,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 12:49:00,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-15 12:49:00,628 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-15 12:49:00,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:49:00,629 INFO L85 PathProgramCache]: Analyzing trace with hash 25239908, now seen corresponding path program 1 times [2023-02-15 12:49:00,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:49:00,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167527292] [2023-02-15 12:49:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:49:00,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:49:00,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:49:01,199 INFO L134 CoverageAnalysis]: Checked inductivity of 34193 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 34191 trivial. 0 not checked. [2023-02-15 12:49:01,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:49:01,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167527292] [2023-02-15 12:49:01,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167527292] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:49:01,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042998606] [2023-02-15 12:49:01,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:49:01,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:49:01,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:49:01,202 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) [2023-02-15 12:49:01,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 12:49:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:49:01,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 1920 conjuncts, 133 conjunts are in the unsatisfiable core [2023-02-15 12:49:01,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:49:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 34193 backedges. 0 proven. 34191 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 12:49:07,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:49:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 34193 backedges. 0 proven. 34191 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 12:49:24,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042998606] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:49:24,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:49:24,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 134, 134] total 271 [2023-02-15 12:49:24,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865115619] [2023-02-15 12:49:24,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:49:24,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 271 states [2023-02-15 12:49:24,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:49:24,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 271 interpolants. [2023-02-15 12:49:24,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35790, Invalid=37380, Unknown=0, NotChecked=0, Total=73170 [2023-02-15 12:49:24,206 INFO L87 Difference]: Start difference. First operand 707 states and 740 transitions. Second operand has 271 states, 271 states have (on average 3.985239852398524) internal successors, (1080), 271 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)