./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/uthash-2.0.2/uthash_SFH_test7-2.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 9e43379b3f2624d77eec1084820c7c07499f5ec4432514ab066d4f5cf96eeebc --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 16:20:32,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 16:20:32,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 16:20:33,002 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 16:20:33,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 16:20:33,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 16:20:33,008 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 16:20:33,013 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 16:20:33,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 16:20:33,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 16:20:33,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 16:20:33,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 16:20:33,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 16:20:33,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 16:20:33,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 16:20:33,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 16:20:33,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 16:20:33,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 16:20:33,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 16:20:33,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 16:20:33,052 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 16:20:33,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 16:20:33,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 16:20:33,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 16:20:33,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 16:20:33,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 16:20:33,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 16:20:33,060 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 16:20:33,061 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 16:20:33,061 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 16:20:33,061 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 16:20:33,062 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 16:20:33,064 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 16:20:33,064 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 16:20:33,065 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 16:20:33,066 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 16:20:33,066 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 16:20:33,066 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 16:20:33,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 16:20:33,067 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 16:20:33,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 16:20:33,069 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 16:20:33,098 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 16:20:33,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 16:20:33,098 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 16:20:33,098 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 16:20:33,099 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 16:20:33,099 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 16:20:33,100 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 16:20:33,100 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 16:20:33,100 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 16:20:33,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 16:20:33,100 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 16:20:33,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 16:20:33,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 16:20:33,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 16:20:33,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 16:20:33,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 16:20:33,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 16:20:33,101 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 16:20:33,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 16:20:33,102 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 16:20:33,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 16:20:33,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 16:20:33,102 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 16:20:33,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 16:20:33,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:20:33,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 16:20:33,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 16:20:33,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 16:20:33,104 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 16:20:33,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 16:20:33,104 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 16:20:33,105 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 16:20:33,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 16:20:33,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 16:20:33,105 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e43379b3f2624d77eec1084820c7c07499f5ec4432514ab066d4f5cf96eeebc [2021-12-22 16:20:33,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 16:20:33,311 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 16:20:33,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 16:20:33,313 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 16:20:33,314 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 16:20:33,315 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i [2021-12-22 16:20:33,357 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb28838a5/2a8d450ddac8440ab77b7f36d63ad35f/FLAGc2002b399 [2021-12-22 16:20:33,776 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 16:20:33,779 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-2.i [2021-12-22 16:20:33,802 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb28838a5/2a8d450ddac8440ab77b7f36d63ad35f/FLAGc2002b399 [2021-12-22 16:20:34,109 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb28838a5/2a8d450ddac8440ab77b7f36d63ad35f [2021-12-22 16:20:34,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 16:20:34,113 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 16:20:34,115 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 16:20:34,115 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 16:20:34,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 16:20:34,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:20:34" (1/1) ... [2021-12-22 16:20:34,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39732bc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:20:34, skipping insertion in model container [2021-12-22 16:20:34,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:20:34" (1/1) ... [2021-12-22 16:20:34,123 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 16:20:34,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 16:20:34,524 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/uthash-2.0.2/uthash_SFH_test7-2.i[33021,33034] [2021-12-22 16:20:34,599 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/uthash-2.0.2/uthash_SFH_test7-2.i[44124,44137] [2021-12-22 16:20:34,600 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/uthash-2.0.2/uthash_SFH_test7-2.i[44245,44258] [2021-12-22 16:20:34,613 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:20:34,618 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 16:20:34,635 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/uthash-2.0.2/uthash_SFH_test7-2.i[33021,33034] [2021-12-22 16:20:34,672 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/uthash-2.0.2/uthash_SFH_test7-2.i[44124,44137] [2021-12-22 16:20:34,673 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/uthash-2.0.2/uthash_SFH_test7-2.i[44245,44258] [2021-12-22 16:20:34,679 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:20:34,704 INFO L208 MainTranslator]: Completed translation [2021-12-22 16:20:34,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:20:34 WrapperNode [2021-12-22 16:20:34,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 16:20:34,705 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 16:20:34,705 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 16:20:34,705 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 16:20:34,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:20:34" (1/1) ... [2021-12-22 16:20:34,729 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:20:34" (1/1) ... [2021-12-22 16:20:34,794 INFO L137 Inliner]: procedures = 176, calls = 328, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1151 [2021-12-22 16:20:34,795 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 16:20:34,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 16:20:34,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 16:20:34,796 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 16:20:34,802 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:20:34" (1/1) ... [2021-12-22 16:20:34,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:20:34" (1/1) ... [2021-12-22 16:20:34,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:20:34" (1/1) ... [2021-12-22 16:20:34,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:20:34" (1/1) ... [2021-12-22 16:20:34,881 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:20:34" (1/1) ... [2021-12-22 16:20:34,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:20:34" (1/1) ... [2021-12-22 16:20:34,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:20:34" (1/1) ... [2021-12-22 16:20:34,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 16:20:34,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 16:20:34,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 16:20:34,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 16:20:34,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:20:34" (1/1) ... [2021-12-22 16:20:34,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:20:34,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:20:34,952 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) [2021-12-22 16:20:34,972 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 [2021-12-22 16:20:34,984 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 16:20:34,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 16:20:34,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-22 16:20:34,985 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-22 16:20:34,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 16:20:34,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 16:20:34,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 16:20:34,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 16:20:34,985 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-22 16:20:34,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 16:20:34,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 16:20:34,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 16:20:34,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 16:20:34,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 16:20:35,198 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 16:20:35,199 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 16:20:35,834 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 16:20:35,840 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 16:20:35,840 INFO L299 CfgBuilder]: Removed 72 assume(true) statements. [2021-12-22 16:20:35,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:20:35 BoogieIcfgContainer [2021-12-22 16:20:35,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 16:20:35,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 16:20:35,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 16:20:35,846 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 16:20:35,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:20:34" (1/3) ... [2021-12-22 16:20:35,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@435a2f1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:20:35, skipping insertion in model container [2021-12-22 16:20:35,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:20:34" (2/3) ... [2021-12-22 16:20:35,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@435a2f1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:20:35, skipping insertion in model container [2021-12-22 16:20:35,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:20:35" (3/3) ... [2021-12-22 16:20:35,848 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test7-2.i [2021-12-22 16:20:35,851 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 16:20:35,851 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-22 16:20:35,882 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 16:20:35,886 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 [2021-12-22 16:20:35,886 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 16:20:35,898 INFO L276 IsEmpty]: Start isEmpty. Operand has 215 states, 208 states have (on average 1.6971153846153846) internal successors, (353), 210 states have internal predecessors, (353), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 16:20:35,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 16:20:35,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:20:35,901 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:20:35,902 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:20:35,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:20:35,905 INFO L85 PathProgramCache]: Analyzing trace with hash -2094566776, now seen corresponding path program 1 times [2021-12-22 16:20:35,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:20:35,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184556969] [2021-12-22 16:20:35,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:20:35,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:20:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:20:36,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:20:36,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:20:36,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184556969] [2021-12-22 16:20:36,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184556969] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:20:36,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:20:36,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:20:36,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000564978] [2021-12-22 16:20:36,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:20:36,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 16:20:36,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:20:36,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 16:20:36,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 16:20:36,056 INFO L87 Difference]: Start difference. First operand has 215 states, 208 states have (on average 1.6971153846153846) internal successors, (353), 210 states have internal predecessors, (353), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-12-22 16:20:36,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:20:36,104 INFO L93 Difference]: Finished difference Result 427 states and 715 transitions. [2021-12-22 16:20:36,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 16:20:36,106 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 [2021-12-22 16:20:36,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:20:36,113 INFO L225 Difference]: With dead ends: 427 [2021-12-22 16:20:36,114 INFO L226 Difference]: Without dead ends: 181 [2021-12-22 16:20:36,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 16:20:36,119 INFO L933 BasicCegarLoop]: 280 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, 280 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 [2021-12-22 16:20:36,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:20:36,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-12-22 16:20:36,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-12-22 16:20:36,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 175 states have (on average 1.3142857142857143) internal successors, (230), 176 states have internal predecessors, (230), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 16:20:36,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 236 transitions. [2021-12-22 16:20:36,179 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 236 transitions. Word has length 8 [2021-12-22 16:20:36,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:20:36,179 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 236 transitions. [2021-12-22 16:20:36,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-12-22 16:20:36,180 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 236 transitions. [2021-12-22 16:20:36,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 16:20:36,180 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:20:36,180 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:20:36,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 16:20:36,181 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:20:36,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:20:36,181 INFO L85 PathProgramCache]: Analyzing trace with hash -716312389, now seen corresponding path program 1 times [2021-12-22 16:20:36,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:20:36,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548998256] [2021-12-22 16:20:36,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:20:36,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:20:36,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:20:36,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:20:36,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:20:36,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548998256] [2021-12-22 16:20:36,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548998256] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:20:36,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:20:36,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:20:36,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667553793] [2021-12-22 16:20:36,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:20:36,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:20:36,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:20:36,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:20:36,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:20:36,226 INFO L87 Difference]: Start difference. First operand 181 states and 236 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-12-22 16:20:36,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:20:36,481 INFO L93 Difference]: Finished difference Result 386 states and 505 transitions. [2021-12-22 16:20:36,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:20:36,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2021-12-22 16:20:36,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:20:36,483 INFO L225 Difference]: With dead ends: 386 [2021-12-22 16:20:36,483 INFO L226 Difference]: Without dead ends: 299 [2021-12-22 16:20:36,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:20:36,485 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 146 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:20:36,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 578 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:20:36,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-12-22 16:20:36,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 183. [2021-12-22 16:20:36,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 177 states have (on average 1.310734463276836) internal successors, (232), 178 states have internal predecessors, (232), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 16:20:36,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 238 transitions. [2021-12-22 16:20:36,493 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 238 transitions. Word has length 10 [2021-12-22 16:20:36,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:20:36,494 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 238 transitions. [2021-12-22 16:20:36,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-12-22 16:20:36,494 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 238 transitions. [2021-12-22 16:20:36,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-22 16:20:36,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:20:36,496 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:20:36,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 16:20:36,496 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:20:36,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:20:36,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1437380185, now seen corresponding path program 1 times [2021-12-22 16:20:36,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:20:36,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001393301] [2021-12-22 16:20:36,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:20:36,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:20:36,592 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:20:36,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1023486788] [2021-12-22 16:20:36,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:20:36,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:20:36,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:20:36,594 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:20:36,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 16:20:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:20:37,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 1565 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 16:20:37,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:20:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:20:37,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:20:37,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:20:37,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001393301] [2021-12-22 16:20:37,188 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:20:37,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023486788] [2021-12-22 16:20:37,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023486788] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:20:37,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:20:37,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:20:37,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135939203] [2021-12-22 16:20:37,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:20:37,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:20:37,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:20:37,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:20:37,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:20:37,190 INFO L87 Difference]: Start difference. First operand 183 states and 238 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2021-12-22 16:20:37,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:20:37,255 INFO L93 Difference]: Finished difference Result 383 states and 503 transitions. [2021-12-22 16:20:37,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:20:37,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 62 [2021-12-22 16:20:37,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:20:37,258 INFO L225 Difference]: With dead ends: 383 [2021-12-22 16:20:37,258 INFO L226 Difference]: Without dead ends: 204 [2021-12-22 16:20:37,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:20:37,259 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 9 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:20:37,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 417 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:20:37,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-12-22 16:20:37,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2021-12-22 16:20:37,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 197 states have (on average 1.2791878172588833) internal successors, (252), 198 states have internal predecessors, (252), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 16:20:37,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 258 transitions. [2021-12-22 16:20:37,266 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 258 transitions. Word has length 62 [2021-12-22 16:20:37,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:20:37,266 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 258 transitions. [2021-12-22 16:20:37,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2021-12-22 16:20:37,266 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 258 transitions. [2021-12-22 16:20:37,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-22 16:20:37,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:20:37,273 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:20:37,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 16:20:37,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:20:37,488 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:20:37,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:20:37,488 INFO L85 PathProgramCache]: Analyzing trace with hash -539986907, now seen corresponding path program 1 times [2021-12-22 16:20:37,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:20:37,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899897737] [2021-12-22 16:20:37,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:20:37,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:20:37,588 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:20:37,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565156502] [2021-12-22 16:20:37,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:20:37,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:20:37,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:20:37,593 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:20:37,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 16:20:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:20:38,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 1567 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 16:20:38,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:20:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:20:38,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:20:38,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:20:38,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899897737] [2021-12-22 16:20:38,256 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:20:38,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565156502] [2021-12-22 16:20:38,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565156502] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:20:38,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:20:38,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:20:38,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294326458] [2021-12-22 16:20:38,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:20:38,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:20:38,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:20:38,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:20:38,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:20:38,264 INFO L87 Difference]: Start difference. First operand 203 states and 258 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2021-12-22 16:20:38,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:20:38,328 INFO L93 Difference]: Finished difference Result 394 states and 504 transitions. [2021-12-22 16:20:38,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:20:38,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 62 [2021-12-22 16:20:38,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:20:38,330 INFO L225 Difference]: With dead ends: 394 [2021-12-22 16:20:38,330 INFO L226 Difference]: Without dead ends: 195 [2021-12-22 16:20:38,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:20:38,333 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 214 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:20:38,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 435 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:20:38,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-22 16:20:38,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 189. [2021-12-22 16:20:38,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 183 states have (on average 1.2622950819672132) internal successors, (231), 184 states have internal predecessors, (231), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 16:20:38,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 237 transitions. [2021-12-22 16:20:38,353 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 237 transitions. Word has length 62 [2021-12-22 16:20:38,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:20:38,353 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 237 transitions. [2021-12-22 16:20:38,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2021-12-22 16:20:38,353 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 237 transitions. [2021-12-22 16:20:38,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-22 16:20:38,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:20:38,357 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:20:38,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 16:20:38,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-22 16:20:38,572 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:20:38,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:20:38,572 INFO L85 PathProgramCache]: Analyzing trace with hash -67840205, now seen corresponding path program 1 times [2021-12-22 16:20:38,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:20:38,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205835296] [2021-12-22 16:20:38,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:20:38,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:20:38,637 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:20:38,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1258198654] [2021-12-22 16:20:38,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:20:38,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:20:38,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:20:38,639 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:20:38,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 16:20:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:20:39,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 1553 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 16:20:39,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:20:39,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:20:39,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:20:39,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:20:39,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205835296] [2021-12-22 16:20:39,390 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:20:39,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258198654] [2021-12-22 16:20:39,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258198654] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:20:39,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:20:39,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:20:39,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480194377] [2021-12-22 16:20:39,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:20:39,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:20:39,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:20:39,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:20:39,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:20:39,393 INFO L87 Difference]: Start difference. First operand 189 states and 237 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2021-12-22 16:20:39,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:20:39,443 INFO L93 Difference]: Finished difference Result 487 states and 610 transitions. [2021-12-22 16:20:39,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:20:39,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 62 [2021-12-22 16:20:39,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:20:39,444 INFO L225 Difference]: With dead ends: 487 [2021-12-22 16:20:39,444 INFO L226 Difference]: Without dead ends: 302 [2021-12-22 16:20:39,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:20:39,445 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 101 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:20:39,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 473 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:20:39,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-12-22 16:20:39,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 295. [2021-12-22 16:20:39,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 289 states have (on average 1.259515570934256) internal successors, (364), 290 states have internal predecessors, (364), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 16:20:39,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 370 transitions. [2021-12-22 16:20:39,453 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 370 transitions. Word has length 62 [2021-12-22 16:20:39,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:20:39,454 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 370 transitions. [2021-12-22 16:20:39,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2021-12-22 16:20:39,454 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 370 transitions. [2021-12-22 16:20:39,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-22 16:20:39,457 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:20:39,457 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:20:39,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 16:20:39,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:20:39,672 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:20:39,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:20:39,672 INFO L85 PathProgramCache]: Analyzing trace with hash -781422495, now seen corresponding path program 1 times [2021-12-22 16:20:39,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:20:39,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745150391] [2021-12-22 16:20:39,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:20:39,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:20:39,707 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:20:39,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2137805590] [2021-12-22 16:20:39,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:20:39,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:20:39,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:20:39,717 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:20:39,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 16:20:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:20:40,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 16:20:40,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:20:40,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 16:20:40,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-12-22 16:20:40,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 16:20:40,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:20:40,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:20:40,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745150391] [2021-12-22 16:20:40,260 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:20:40,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137805590] [2021-12-22 16:20:40,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137805590] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:20:40,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:20:40,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:20:40,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45757390] [2021-12-22 16:20:40,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:20:40,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:20:40,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:20:40,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:20:40,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:20:40,262 INFO L87 Difference]: Start difference. First operand 295 states and 370 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:20:40,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:20:40,487 INFO L93 Difference]: Finished difference Result 393 states and 500 transitions. [2021-12-22 16:20:40,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:20:40,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 77 [2021-12-22 16:20:40,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:20:40,489 INFO L225 Difference]: With dead ends: 393 [2021-12-22 16:20:40,489 INFO L226 Difference]: Without dead ends: 389 [2021-12-22 16:20:40,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:20:40,490 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 102 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:20:40,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 602 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:20:40,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-12-22 16:20:40,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 297. [2021-12-22 16:20:40,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 291 states have (on average 1.2577319587628866) internal successors, (366), 292 states have internal predecessors, (366), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 16:20:40,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 372 transitions. [2021-12-22 16:20:40,496 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 372 transitions. Word has length 77 [2021-12-22 16:20:40,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:20:40,497 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 372 transitions. [2021-12-22 16:20:40,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:20:40,498 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 372 transitions. [2021-12-22 16:20:40,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-22 16:20:40,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:20:40,498 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:20:40,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 16:20:40,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:20:40,712 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:20:40,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:20:40,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1698389817, now seen corresponding path program 1 times [2021-12-22 16:20:40,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:20:40,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62589889] [2021-12-22 16:20:40,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:20:40,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:20:40,742 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:20:40,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [234653069] [2021-12-22 16:20:40,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:20:40,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:20:40,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:20:40,744 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:20:40,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 16:20:41,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:20:41,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 16:20:41,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:20:41,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 16:20:41,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:20:41,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:20:41,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62589889] [2021-12-22 16:20:41,270 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:20:41,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234653069] [2021-12-22 16:20:41,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234653069] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:20:41,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:20:41,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:20:41,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116855679] [2021-12-22 16:20:41,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:20:41,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:20:41,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:20:41,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:20:41,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:20:41,272 INFO L87 Difference]: Start difference. First operand 297 states and 372 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:20:41,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:20:41,318 INFO L93 Difference]: Finished difference Result 487 states and 631 transitions. [2021-12-22 16:20:41,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:20:41,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2021-12-22 16:20:41,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:20:41,326 INFO L225 Difference]: With dead ends: 487 [2021-12-22 16:20:41,326 INFO L226 Difference]: Without dead ends: 339 [2021-12-22 16:20:41,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:20:41,327 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 8 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:20:41,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 405 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:20:41,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-12-22 16:20:41,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 337. [2021-12-22 16:20:41,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 331 states have (on average 1.2265861027190332) internal successors, (406), 332 states have internal predecessors, (406), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 16:20:41,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 412 transitions. [2021-12-22 16:20:41,356 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 412 transitions. Word has length 111 [2021-12-22 16:20:41,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:20:41,356 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 412 transitions. [2021-12-22 16:20:41,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:20:41,356 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 412 transitions. [2021-12-22 16:20:41,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-22 16:20:41,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:20:41,357 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:20:41,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 16:20:41,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:20:41,572 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:20:41,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:20:41,572 INFO L85 PathProgramCache]: Analyzing trace with hash -687272567, now seen corresponding path program 1 times [2021-12-22 16:20:41,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:20:41,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022613188] [2021-12-22 16:20:41,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:20:41,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:20:41,602 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:20:41,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541965160] [2021-12-22 16:20:41,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:20:41,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:20:41,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:20:41,615 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:20:41,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 16:20:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:20:42,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 16:20:42,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:20:42,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 16:20:42,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:20:42,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:20:42,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022613188] [2021-12-22 16:20:42,205 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:20:42,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541965160] [2021-12-22 16:20:42,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541965160] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:20:42,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:20:42,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 16:20:42,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069624826] [2021-12-22 16:20:42,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:20:42,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:20:42,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:20:42,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:20:42,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:20:42,206 INFO L87 Difference]: Start difference. First operand 337 states and 412 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:20:42,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:20:42,258 INFO L93 Difference]: Finished difference Result 502 states and 626 transitions. [2021-12-22 16:20:42,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:20:42,259 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2021-12-22 16:20:42,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:20:42,260 INFO L225 Difference]: With dead ends: 502 [2021-12-22 16:20:42,260 INFO L226 Difference]: Without dead ends: 314 [2021-12-22 16:20:42,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:20:42,261 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 108 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:20:42,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 522 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:20:42,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-12-22 16:20:42,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 309. [2021-12-22 16:20:42,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 303 states have (on average 1.2013201320132014) internal successors, (364), 304 states have internal predecessors, (364), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 16:20:42,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 370 transitions. [2021-12-22 16:20:42,266 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 370 transitions. Word has length 111 [2021-12-22 16:20:42,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:20:42,267 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 370 transitions. [2021-12-22 16:20:42,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:20:42,267 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 370 transitions. [2021-12-22 16:20:42,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-22 16:20:42,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:20:42,268 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:20:42,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 16:20:42,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:20:42,481 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:20:42,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:20:42,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1844881027, now seen corresponding path program 1 times [2021-12-22 16:20:42,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:20:42,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213819212] [2021-12-22 16:20:42,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:20:42,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:20:42,511 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:20:42,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1745265895] [2021-12-22 16:20:42,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:20:42,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:20:42,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:20:42,513 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:20:42,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 16:20:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:20:43,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 16:20:43,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:20:43,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 16:20:43,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:20:43,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:20:43,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213819212] [2021-12-22 16:20:43,192 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:20:43,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745265895] [2021-12-22 16:20:43,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745265895] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:20:43,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:20:43,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:20:43,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667250593] [2021-12-22 16:20:43,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:20:43,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:20:43,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:20:43,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:20:43,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:20:43,194 INFO L87 Difference]: Start difference. First operand 309 states and 370 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:20:43,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:20:43,367 INFO L93 Difference]: Finished difference Result 661 states and 798 transitions. [2021-12-22 16:20:43,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:20:43,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2021-12-22 16:20:43,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:20:43,372 INFO L225 Difference]: With dead ends: 661 [2021-12-22 16:20:43,372 INFO L226 Difference]: Without dead ends: 400 [2021-12-22 16:20:43,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:20:43,372 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 410 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:20:43,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 381 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:20:43,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-12-22 16:20:43,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 393. [2021-12-22 16:20:43,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 387 states have (on average 1.2093023255813953) internal successors, (468), 388 states have internal predecessors, (468), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 16:20:43,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 474 transitions. [2021-12-22 16:20:43,380 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 474 transitions. Word has length 111 [2021-12-22 16:20:43,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:20:43,381 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 474 transitions. [2021-12-22 16:20:43,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:20:43,381 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 474 transitions. [2021-12-22 16:20:43,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-22 16:20:43,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:20:43,382 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:20:43,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 16:20:43,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:20:43,606 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:20:43,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:20:43,606 INFO L85 PathProgramCache]: Analyzing trace with hash 473252787, now seen corresponding path program 1 times [2021-12-22 16:20:43,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:20:43,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944460302] [2021-12-22 16:20:43,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:20:43,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:20:43,646 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:20:43,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082730275] [2021-12-22 16:20:43,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:20:43,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:20:43,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:20:43,647 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:20:43,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 16:20:44,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:20:44,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 16:20:44,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:20:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:20:44,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:20:44,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:20:44,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944460302] [2021-12-22 16:20:44,330 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:20:44,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082730275] [2021-12-22 16:20:44,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082730275] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:20:44,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:20:44,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:20:44,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099684957] [2021-12-22 16:20:44,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:20:44,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:20:44,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:20:44,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:20:44,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:20:44,334 INFO L87 Difference]: Start difference. First operand 393 states and 474 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:20:44,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:20:44,359 INFO L93 Difference]: Finished difference Result 738 states and 897 transitions. [2021-12-22 16:20:44,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:20:44,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 118 [2021-12-22 16:20:44,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:20:44,361 INFO L225 Difference]: With dead ends: 738 [2021-12-22 16:20:44,361 INFO L226 Difference]: Without dead ends: 396 [2021-12-22 16:20:44,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:20:44,362 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 2 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:20:44,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 653 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:20:44,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-12-22 16:20:44,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 396. [2021-12-22 16:20:44,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 389 states have (on average 1.2107969151670952) internal successors, (471), 391 states have internal predecessors, (471), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-22 16:20:44,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 478 transitions. [2021-12-22 16:20:44,374 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 478 transitions. Word has length 118 [2021-12-22 16:20:44,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:20:44,374 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 478 transitions. [2021-12-22 16:20:44,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:20:44,374 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 478 transitions. [2021-12-22 16:20:44,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-22 16:20:44,375 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:20:44,375 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:20:44,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-22 16:20:44,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-22 16:20:44,589 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:20:44,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:20:44,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1462820267, now seen corresponding path program 1 times [2021-12-22 16:20:44,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:20:44,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773300180] [2021-12-22 16:20:44,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:20:44,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:20:44,634 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:20:44,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1871670683] [2021-12-22 16:20:44,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:20:44,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:20:44,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:20:44,637 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:20:44,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 16:20:45,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:20:45,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-22 16:20:45,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:20:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:20:45,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:20:45,644 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 16:20:45,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:20:45,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773300180] [2021-12-22 16:20:45,644 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:20:45,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871670683] [2021-12-22 16:20:45,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871670683] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:20:45,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:20:45,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-22 16:20:45,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313686771] [2021-12-22 16:20:45,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:20:45,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 16:20:45,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:20:45,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 16:20:45,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:20:45,647 INFO L87 Difference]: Start difference. First operand 396 states and 478 transitions. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 16:20:45,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:20:45,734 INFO L93 Difference]: Finished difference Result 752 states and 918 transitions. [2021-12-22 16:20:45,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 16:20:45,735 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 120 [2021-12-22 16:20:45,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:20:45,737 INFO L225 Difference]: With dead ends: 752 [2021-12-22 16:20:45,737 INFO L226 Difference]: Without dead ends: 407 [2021-12-22 16:20:45,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-12-22 16:20:45,738 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 13 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:20:45,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 1085 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:20:45,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-12-22 16:20:45,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 405. [2021-12-22 16:20:45,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 397 states have (on average 1.221662468513854) internal successors, (485), 399 states have internal predecessors, (485), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-22 16:20:45,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 492 transitions. [2021-12-22 16:20:45,748 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 492 transitions. Word has length 120 [2021-12-22 16:20:45,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:20:45,748 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 492 transitions. [2021-12-22 16:20:45,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 16:20:45,748 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 492 transitions. [2021-12-22 16:20:45,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-22 16:20:45,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:20:45,749 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:20:45,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 16:20:45,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:20:45,971 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:20:45,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:20:45,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1500970445, now seen corresponding path program 2 times [2021-12-22 16:20:45,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:20:45,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680152061] [2021-12-22 16:20:45,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:20:45,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:20:46,005 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:20:46,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1440702661] [2021-12-22 16:20:46,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:20:46,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:20:46,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:20:46,006 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:20:46,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 16:20:46,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:20:46,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:20:46,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 866 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-22 16:20:46,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:20:46,764 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 16:20:46,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:20:47,092 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 16:20:47,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:20:47,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680152061] [2021-12-22 16:20:47,092 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:20:47,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440702661] [2021-12-22 16:20:47,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440702661] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:20:47,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:20:47,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-12-22 16:20:47,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94904871] [2021-12-22 16:20:47,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:20:47,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 16:20:47,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:20:47,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 16:20:47,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-12-22 16:20:47,094 INFO L87 Difference]: Start difference. First operand 405 states and 492 transitions. Second operand has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 16:20:47,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:20:47,793 INFO L93 Difference]: Finished difference Result 772 states and 948 transitions. [2021-12-22 16:20:47,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 16:20:47,793 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 124 [2021-12-22 16:20:47,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:20:47,795 INFO L225 Difference]: With dead ends: 772 [2021-12-22 16:20:47,795 INFO L226 Difference]: Without dead ends: 418 [2021-12-22 16:20:47,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2021-12-22 16:20:47,796 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 59 mSDsluCounter, 1293 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1514 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:20:47,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 1514 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:20:47,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-12-22 16:20:47,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 414. [2021-12-22 16:20:47,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 406 states have (on average 1.2167487684729064) internal successors, (494), 408 states have internal predecessors, (494), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-22 16:20:47,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 501 transitions. [2021-12-22 16:20:47,806 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 501 transitions. Word has length 124 [2021-12-22 16:20:47,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:20:47,806 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 501 transitions. [2021-12-22 16:20:47,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 16:20:47,806 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 501 transitions. [2021-12-22 16:20:47,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-22 16:20:47,807 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:20:47,807 INFO L514 BasicCegarLoop]: trace histogram [12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:20:47,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 16:20:48,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-22 16:20:48,028 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:20:48,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:20:48,029 INFO L85 PathProgramCache]: Analyzing trace with hash -217295757, now seen corresponding path program 3 times [2021-12-22 16:20:48,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:20:48,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482123386] [2021-12-22 16:20:48,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:20:48,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:20:48,062 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:20:48,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767438952] [2021-12-22 16:20:48,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 16:20:48,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:20:48,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:20:48,064 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:20:48,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process