./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-pthread/cs_fib-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-pthread/cs_fib-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2f188ac4b0bdfe335e0fcb7c5645493965a99a7b8a1d7a552e9d512c30775fb8 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 17:12:18,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 17:12:18,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 17:12:18,920 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 17:12:18,921 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 17:12:18,924 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 17:12:18,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 17:12:18,926 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 17:12:18,930 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 17:12:18,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 17:12:18,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 17:12:18,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 17:12:18,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 17:12:18,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 17:12:18,942 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 17:12:18,943 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 17:12:18,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 17:12:18,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 17:12:18,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 17:12:18,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 17:12:18,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 17:12:18,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 17:12:18,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 17:12:18,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 17:12:18,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 17:12:18,965 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 17:12:18,965 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 17:12:18,966 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 17:12:18,967 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 17:12:18,968 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 17:12:18,968 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 17:12:18,968 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 17:12:18,969 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 17:12:18,970 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 17:12:18,971 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 17:12:18,972 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 17:12:18,973 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 17:12:18,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 17:12:18,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 17:12:18,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 17:12:18,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 17:12:18,975 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 17:12:18,998 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 17:12:18,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 17:12:18,999 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 17:12:18,999 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 17:12:19,000 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 17:12:19,000 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 17:12:19,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 17:12:19,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 17:12:19,001 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 17:12:19,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 17:12:19,001 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 17:12:19,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 17:12:19,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 17:12:19,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 17:12:19,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 17:12:19,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 17:12:19,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 17:12:19,003 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 17:12:19,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 17:12:19,003 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 17:12:19,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 17:12:19,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 17:12:19,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 17:12:19,004 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 17:12:19,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 17:12:19,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 17:12:19,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 17:12:19,005 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 17:12:19,005 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 17:12:19,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 17:12:19,005 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 17:12:19,005 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 17:12:19,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 17:12:19,006 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 17:12:19,006 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f188ac4b0bdfe335e0fcb7c5645493965a99a7b8a1d7a552e9d512c30775fb8 [2021-12-17 17:12:19,258 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 17:12:19,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 17:12:19,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 17:12:19,288 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 17:12:19,288 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 17:12:19,289 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-pthread/cs_fib-2.i [2021-12-17 17:12:19,335 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecc3f317c/806950985ae34b64b642ae4fe3484190/FLAG5973ceb1d [2021-12-17 17:12:19,798 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 17:12:19,798 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_fib-2.i [2021-12-17 17:12:19,822 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecc3f317c/806950985ae34b64b642ae4fe3484190/FLAG5973ceb1d [2021-12-17 17:12:20,122 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecc3f317c/806950985ae34b64b642ae4fe3484190 [2021-12-17 17:12:20,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 17:12:20,126 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 17:12:20,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 17:12:20,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 17:12:20,133 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 17:12:20,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 05:12:20" (1/1) ... [2021-12-17 17:12:20,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@787512cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:12:20, skipping insertion in model container [2021-12-17 17:12:20,139 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 05:12:20" (1/1) ... [2021-12-17 17:12:20,144 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 17:12:20,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 17:12:20,419 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_fib-2.i[23457,23470] [2021-12-17 17:12:20,500 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 17:12:20,512 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 17:12:20,533 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_fib-2.i[23457,23470] [2021-12-17 17:12:20,617 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 17:12:20,659 INFO L208 MainTranslator]: Completed translation [2021-12-17 17:12:20,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:12:20 WrapperNode [2021-12-17 17:12:20,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 17:12:20,661 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 17:12:20,661 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 17:12:20,661 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 17:12:20,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:12:20" (1/1) ... [2021-12-17 17:12:20,701 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:12:20" (1/1) ... [2021-12-17 17:12:20,748 INFO L137 Inliner]: procedures = 144, calls = 356, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 674 [2021-12-17 17:12:20,748 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 17:12:20,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 17:12:20,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 17:12:20,749 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 17:12:20,756 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:12:20" (1/1) ... [2021-12-17 17:12:20,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:12:20" (1/1) ... [2021-12-17 17:12:20,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:12:20" (1/1) ... [2021-12-17 17:12:20,763 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:12:20" (1/1) ... [2021-12-17 17:12:20,801 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:12:20" (1/1) ... [2021-12-17 17:12:20,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:12:20" (1/1) ... [2021-12-17 17:12:20,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:12:20" (1/1) ... [2021-12-17 17:12:20,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 17:12:20,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 17:12:20,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 17:12:20,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 17:12:20,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:12:20" (1/1) ... [2021-12-17 17:12:20,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 17:12:20,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 17:12:20,885 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 17:12:20,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 17:12:20,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 17:12:20,921 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 17:12:20,921 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 17:12:20,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 17:12:20,922 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 17:12:20,922 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 17:12:20,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 17:12:20,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 17:12:20,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-17 17:12:20,923 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2021-12-17 17:12:20,923 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2021-12-17 17:12:20,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-17 17:12:20,923 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2021-12-17 17:12:20,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2021-12-17 17:12:20,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 17:12:20,924 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2021-12-17 17:12:20,924 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2021-12-17 17:12:20,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 17:12:20,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 17:12:20,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 17:12:21,122 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 17:12:21,124 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 17:12:21,343 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset);havoc main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset);havoc main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset; [2021-12-17 17:12:21,343 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume !(0 != ~__CS_ret~0 % 256); [2021-12-17 17:12:21,343 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset);havoc main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset);havoc main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset; [2021-12-17 17:12:21,343 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume !(0 != ~__CS_ret~0 % 256); [2021-12-17 17:12:21,343 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L749: SUMMARY for call __CS_cs(); srcloc: null [2021-12-17 17:12:21,343 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L749-1: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset);havoc main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset);havoc main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset; [2021-12-17 17:12:21,344 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L749-1: assume !(0 != ~__CS_ret~0 % 256); [2021-12-17 17:12:24,181 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 17:12:24,189 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 17:12:24,190 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-17 17:12:24,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 05:12:24 BoogieIcfgContainer [2021-12-17 17:12:24,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 17:12:24,193 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 17:12:24,193 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 17:12:24,196 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 17:12:24,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 05:12:20" (1/3) ... [2021-12-17 17:12:24,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c3a0dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 05:12:24, skipping insertion in model container [2021-12-17 17:12:24,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:12:20" (2/3) ... [2021-12-17 17:12:24,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c3a0dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 05:12:24, skipping insertion in model container [2021-12-17 17:12:24,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 05:12:24" (3/3) ... [2021-12-17 17:12:24,199 INFO L111 eAbstractionObserver]: Analyzing ICFG cs_fib-2.i [2021-12-17 17:12:24,203 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 17:12:24,203 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 17:12:24,255 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 17:12:24,266 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 17:12:24,266 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 17:12:24,288 INFO L276 IsEmpty]: Start isEmpty. Operand has 183 states, 110 states have (on average 1.3454545454545455) internal successors, (148), 111 states have internal predecessors, (148), 66 states have call successors, (66), 5 states have call predecessors, (66), 5 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2021-12-17 17:12:24,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-12-17 17:12:24,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 17:12:24,315 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 17:12:24,316 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 17:12:24,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 17:12:24,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1273778085, now seen corresponding path program 1 times [2021-12-17 17:12:24,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 17:12:24,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859377878] [2021-12-17 17:12:24,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 17:12:24,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 17:13:16,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:25,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 17:13:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:25,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 17:13:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:25,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 17:13:25,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:25,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 17:13:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:25,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-17 17:13:25,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:25,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 17:13:25,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:25,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 17:13:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:25,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 17:13:25,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:25,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 17:13:25,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:25,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 17:13:25,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:25,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-17 17:13:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:25,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 17:13:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:25,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-17 17:13:25,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:25,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-17 17:13:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:25,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-17 17:13:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:25,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 17:13:25,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:25,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-17 17:13:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:25,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-17 17:13:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:25,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-17 17:13:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:25,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-17 17:13:25,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:26,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-17 17:13:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:26,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-17 17:13:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:26,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-17 17:13:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:26,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-17 17:13:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:26,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-12-17 17:13:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:26,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-12-17 17:13:26,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:26,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-12-17 17:13:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:26,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2021-12-17 17:13:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:26,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-12-17 17:13:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:26,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2021-12-17 17:13:26,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:26,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2021-12-17 17:13:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:26,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2021-12-17 17:13:26,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:26,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2021-12-17 17:13:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:26,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-12-17 17:13:26,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:26,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2021-12-17 17:13:26,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:26,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2021-12-17 17:13:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:26,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2021-12-17 17:13:26,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:26,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2021-12-17 17:13:26,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:26,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2021-12-17 17:13:26,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:26,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2021-12-17 17:13:26,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:26,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2021-12-17 17:13:26,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 17:13:26,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859377878] [2021-12-17 17:13:26,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859377878] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 17:13:26,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 17:13:26,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 17:13:26,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888070343] [2021-12-17 17:13:26,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 17:13:26,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 17:13:26,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 17:13:26,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 17:13:26,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 17:13:26,304 INFO L87 Difference]: Start difference. First operand has 183 states, 110 states have (on average 1.3454545454545455) internal successors, (148), 111 states have internal predecessors, (148), 66 states have call successors, (66), 5 states have call predecessors, (66), 5 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) Second operand has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 1 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) [2021-12-17 17:13:26,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 17:13:26,356 INFO L93 Difference]: Finished difference Result 364 states and 622 transitions. [2021-12-17 17:13:26,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 17:13:26,358 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 1 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) Word has length 254 [2021-12-17 17:13:26,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 17:13:26,367 INFO L225 Difference]: With dead ends: 364 [2021-12-17 17:13:26,370 INFO L226 Difference]: Without dead ends: 179 [2021-12-17 17:13:26,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 17:13:26,383 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 17:13:26,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 17:13:26,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-17 17:13:26,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2021-12-17 17:13:26,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 107 states have (on average 1.2990654205607477) internal successors, (139), 108 states have internal predecessors, (139), 66 states have call successors, (66), 5 states have call predecessors, (66), 5 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2021-12-17 17:13:26,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 270 transitions. [2021-12-17 17:13:26,445 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 270 transitions. Word has length 254 [2021-12-17 17:13:26,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 17:13:26,445 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 270 transitions. [2021-12-17 17:13:26,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 1 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) [2021-12-17 17:13:26,446 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 270 transitions. [2021-12-17 17:13:26,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-12-17 17:13:26,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 17:13:26,451 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 17:13:26,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 17:13:26,452 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 17:13:26,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 17:13:26,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1062872223, now seen corresponding path program 1 times [2021-12-17 17:13:26,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 17:13:26,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510674749] [2021-12-17 17:13:26,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 17:13:26,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms