./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 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_BER_test6-1.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 05edfd344a133924af20e7887ded3d695179bf474d7b39ea2b7287f4a108ff8d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-17 14:01:16,934 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-17 14:01:16,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-17 14:01:16,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-17 14:01:16,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-17 14:01:16,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-17 14:01:16,992 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-17 14:01:16,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-17 14:01:16,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-17 14:01:17,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-17 14:01:17,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-17 14:01:17,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-17 14:01:17,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-17 14:01:17,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-17 14:01:17,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-17 14:01:17,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-17 14:01:17,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-17 14:01:17,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-17 14:01:17,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-17 14:01:17,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-17 14:01:17,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-17 14:01:17,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-17 14:01:17,022 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-17 14:01:17,023 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-17 14:01:17,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-17 14:01:17,027 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-17 14:01:17,027 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-17 14:01:17,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-17 14:01:17,028 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-17 14:01:17,029 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-17 14:01:17,029 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-17 14:01:17,030 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-17 14:01:17,031 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-17 14:01:17,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-17 14:01:17,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-17 14:01:17,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-17 14:01:17,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-17 14:01:17,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-17 14:01:17,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-17 14:01:17,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-17 14:01:17,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-17 14:01:17,036 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-17 14:01:17,065 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-17 14:01:17,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-17 14:01:17,066 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-17 14:01:17,066 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-17 14:01:17,067 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-17 14:01:17,067 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-17 14:01:17,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-17 14:01:17,068 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-17 14:01:17,068 INFO L138 SettingsManager]: * Use SBE=true [2021-11-17 14:01:17,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-17 14:01:17,069 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-17 14:01:17,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-17 14:01:17,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-17 14:01:17,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-17 14:01:17,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-17 14:01:17,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-17 14:01:17,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-17 14:01:17,070 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-17 14:01:17,071 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-17 14:01:17,071 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-17 14:01:17,071 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-17 14:01:17,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-17 14:01:17,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-17 14:01:17,072 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-17 14:01:17,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-17 14:01:17,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-17 14:01:17,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-17 14:01:17,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-17 14:01:17,073 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-17 14:01:17,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-17 14:01:17,073 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-17 14:01:17,073 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-17 14:01:17,073 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-17 14:01:17,074 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-17 14:01:17,074 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05edfd344a133924af20e7887ded3d695179bf474d7b39ea2b7287f4a108ff8d [2021-11-17 14:01:17,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-17 14:01:17,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-17 14:01:17,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-17 14:01:17,327 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-17 14:01:17,328 INFO L275 PluginConnector]: CDTParser initialized [2021-11-17 14:01:17,329 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-1.i [2021-11-17 14:01:17,382 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab9a2a1da/f138853884664b1e8a5e92f415088e9c/FLAGe0a9d5813 [2021-11-17 14:01:17,807 INFO L306 CDTParser]: Found 1 translation units. [2021-11-17 14:01:17,809 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-1.i [2021-11-17 14:01:17,824 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab9a2a1da/f138853884664b1e8a5e92f415088e9c/FLAGe0a9d5813 [2021-11-17 14:01:18,129 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab9a2a1da/f138853884664b1e8a5e92f415088e9c [2021-11-17 14:01:18,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-17 14:01:18,132 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-17 14:01:18,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-17 14:01:18,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-17 14:01:18,141 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-17 14:01:18,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 02:01:18" (1/1) ... [2021-11-17 14:01:18,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eebe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:01:18, skipping insertion in model container [2021-11-17 14:01:18,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 02:01:18" (1/1) ... [2021-11-17 14:01:18,148 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-17 14:01:18,201 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-17 14:01:18,578 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_BER_test6-1.i[44118,44131] [2021-11-17 14:01:18,593 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_BER_test6-1.i[44660,44673] [2021-11-17 14:01:18,698 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_BER_test6-1.i[56247,56260] [2021-11-17 14:01:18,703 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_BER_test6-1.i[56368,56381] [2021-11-17 14:01:18,709 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-17 14:01:18,717 INFO L203 MainTranslator]: Completed pre-run [2021-11-17 14:01:18,742 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_BER_test6-1.i[44118,44131] [2021-11-17 14:01:18,744 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_BER_test6-1.i[44660,44673] [2021-11-17 14:01:18,793 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_BER_test6-1.i[56247,56260] [2021-11-17 14:01:18,794 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_BER_test6-1.i[56368,56381] [2021-11-17 14:01:18,797 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-17 14:01:18,873 INFO L208 MainTranslator]: Completed translation [2021-11-17 14:01:18,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:01:18 WrapperNode [2021-11-17 14:01:18,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-17 14:01:18,875 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-17 14:01:18,875 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-17 14:01:18,875 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-17 14:01:18,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:01:18" (1/1) ... [2021-11-17 14:01:18,922 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:01:18" (1/1) ... [2021-11-17 14:01:18,986 INFO L137 Inliner]: procedures = 282, calls = 294, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 1039 [2021-11-17 14:01:18,995 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-17 14:01:18,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-17 14:01:18,996 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-17 14:01:18,996 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-17 14:01:19,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:01:18" (1/1) ... [2021-11-17 14:01:19,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:01:18" (1/1) ... [2021-11-17 14:01:19,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:01:18" (1/1) ... [2021-11-17 14:01:19,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:01:18" (1/1) ... [2021-11-17 14:01:19,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:01:18" (1/1) ... [2021-11-17 14:01:19,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:01:18" (1/1) ... [2021-11-17 14:01:19,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:01:18" (1/1) ... [2021-11-17 14:01:19,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-17 14:01:19,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-17 14:01:19,100 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-17 14:01:19,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-17 14:01:19,101 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:01:18" (1/1) ... [2021-11-17 14:01:19,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-17 14:01:19,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 14:01:19,164 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) [2021-11-17 14:01:19,198 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 [2021-11-17 14:01:19,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-17 14:01:19,227 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-17 14:01:19,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-17 14:01:19,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-17 14:01:19,228 INFO L130 BoogieDeclarations]: Found specification of procedure alt_bzero [2021-11-17 14:01:19,228 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_bzero [2021-11-17 14:01:19,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-17 14:01:19,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-17 14:01:19,228 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-17 14:01:19,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-17 14:01:19,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-17 14:01:19,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-17 14:01:19,229 INFO L130 BoogieDeclarations]: Found specification of procedure alt_malloc [2021-11-17 14:01:19,229 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_malloc [2021-11-17 14:01:19,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-17 14:01:19,230 INFO L130 BoogieDeclarations]: Found specification of procedure alt_free [2021-11-17 14:01:19,230 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_free [2021-11-17 14:01:19,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-17 14:01:19,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-17 14:01:19,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-17 14:01:19,438 INFO L236 CfgBuilder]: Building ICFG [2021-11-17 14:01:19,440 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-17 14:01:20,149 INFO L277 CfgBuilder]: Performing block encoding [2021-11-17 14:01:20,161 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-17 14:01:20,163 INFO L301 CfgBuilder]: Removed 63 assume(true) statements. [2021-11-17 14:01:20,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 02:01:20 BoogieIcfgContainer [2021-11-17 14:01:20,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-17 14:01:20,168 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-17 14:01:20,168 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-17 14:01:20,174 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-17 14:01:20,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 02:01:18" (1/3) ... [2021-11-17 14:01:20,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b967f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 02:01:20, skipping insertion in model container [2021-11-17 14:01:20,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:01:18" (2/3) ... [2021-11-17 14:01:20,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b967f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 02:01:20, skipping insertion in model container [2021-11-17 14:01:20,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 02:01:20" (3/3) ... [2021-11-17 14:01:20,179 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_BER_test6-1.i [2021-11-17 14:01:20,183 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-17 14:01:20,183 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-17 14:01:20,233 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-17 14:01:20,239 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 [2021-11-17 14:01:20,239 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-17 14:01:20,262 INFO L276 IsEmpty]: Start isEmpty. Operand has 225 states, 203 states have (on average 1.6354679802955665) internal successors, (332), 207 states have internal predecessors, (332), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-17 14:01:20,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-17 14:01:20,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 14:01:20,266 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 14:01:20,267 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 14:01:20,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 14:01:20,270 INFO L85 PathProgramCache]: Analyzing trace with hash -720802776, now seen corresponding path program 1 times [2021-11-17 14:01:20,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 14:01:20,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143437873] [2021-11-17 14:01:20,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:01:20,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 14:01:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 14:01:20,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 14:01:20,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 14:01:20,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143437873] [2021-11-17 14:01:20,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143437873] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 14:01:20,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 14:01:20,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-17 14:01:20,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123053278] [2021-11-17 14:01:20,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 14:01:20,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-17 14:01:20,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 14:01:20,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-17 14:01:20,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-17 14:01:20,421 INFO L87 Difference]: Start difference. First operand has 225 states, 203 states have (on average 1.6354679802955665) internal successors, (332), 207 states have internal predecessors, (332), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) 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) [2021-11-17 14:01:20,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 14:01:20,471 INFO L93 Difference]: Finished difference Result 445 states and 724 transitions. [2021-11-17 14:01:20,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-17 14:01:20,473 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 [2021-11-17 14:01:20,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 14:01:20,482 INFO L225 Difference]: With dead ends: 445 [2021-11-17 14:01:20,482 INFO L226 Difference]: Without dead ends: 218 [2021-11-17 14:01:20,485 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 [2021-11-17 14:01:20,488 INFO L933 BasicCegarLoop]: 285 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, 285 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 [2021-11-17 14:01:20,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-17 14:01:20,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-17 14:01:20,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2021-11-17 14:01:20,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 197 states have (on average 1.299492385786802) internal successors, (256), 202 states have internal predecessors, (256), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-17 14:01:20,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 281 transitions. [2021-11-17 14:01:20,534 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 281 transitions. Word has length 8 [2021-11-17 14:01:20,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 14:01:20,535 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 281 transitions. [2021-11-17 14:01:20,535 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) [2021-11-17 14:01:20,535 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 281 transitions. [2021-11-17 14:01:20,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-17 14:01:20,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 14:01:20,536 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 14:01:20,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-17 14:01:20,536 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 14:01:20,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 14:01:20,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1810590275, now seen corresponding path program 1 times [2021-11-17 14:01:20,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 14:01:20,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482532977] [2021-11-17 14:01:20,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:01:20,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 14:01:20,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 14:01:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 14:01:20,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 14:01:20,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482532977] [2021-11-17 14:01:20,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482532977] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 14:01:20,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 14:01:20,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-17 14:01:20,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404719823] [2021-11-17 14:01:20,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 14:01:20,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-17 14:01:20,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 14:01:20,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-17 14:01:20,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-17 14:01:20,599 INFO L87 Difference]: Start difference. First operand 218 states and 281 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) [2021-11-17 14:01:20,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 14:01:20,928 INFO L93 Difference]: Finished difference Result 455 states and 590 transitions. [2021-11-17 14:01:20,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-17 14:01:20,929 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 [2021-11-17 14:01:20,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 14:01:20,932 INFO L225 Difference]: With dead ends: 455 [2021-11-17 14:01:20,932 INFO L226 Difference]: Without dead ends: 346 [2021-11-17 14:01:20,933 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 [2021-11-17 14:01:20,936 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 152 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-17 14:01:20,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 716 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-17 14:01:20,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-11-17 14:01:20,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 220. [2021-11-17 14:01:20,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 199 states have (on average 1.2964824120603016) internal successors, (258), 204 states have internal predecessors, (258), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-17 14:01:20,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 283 transitions. [2021-11-17 14:01:20,968 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 283 transitions. Word has length 10 [2021-11-17 14:01:20,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 14:01:20,968 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 283 transitions. [2021-11-17 14:01:20,968 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) [2021-11-17 14:01:20,969 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 283 transitions. [2021-11-17 14:01:20,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-17 14:01:20,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 14:01:20,970 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 14:01:20,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-17 14:01:20,972 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 14:01:20,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 14:01:20,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1082818915, now seen corresponding path program 1 times [2021-11-17 14:01:20,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 14:01:20,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812366253] [2021-11-17 14:01:20,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:01:20,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 14:01:21,008 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 14:01:21,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172603166] [2021-11-17 14:01:21,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:01:21,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 14:01:21,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 14:01:21,014 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) [2021-11-17 14:01:21,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-17 14:01:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 14:01:21,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-17 14:01:21,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 14:01:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 14:01:21,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 14:01:21,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 14:01:21,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812366253] [2021-11-17 14:01:21,346 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 14:01:21,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172603166] [2021-11-17 14:01:21,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172603166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 14:01:21,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 14:01:21,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-17 14:01:21,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558269567] [2021-11-17 14:01:21,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 14:01:21,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-17 14:01:21,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 14:01:21,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-17 14:01:21,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 14:01:21,349 INFO L87 Difference]: Start difference. First operand 220 states and 283 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 14:01:21,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 14:01:21,408 INFO L93 Difference]: Finished difference Result 457 states and 593 transitions. [2021-11-17 14:01:21,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-17 14:01:21,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-17 14:01:21,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 14:01:21,410 INFO L225 Difference]: With dead ends: 457 [2021-11-17 14:01:21,410 INFO L226 Difference]: Without dead ends: 241 [2021-11-17 14:01:21,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 14:01:21,416 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 9 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 507 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 [2021-11-17 14:01:21,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 507 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-17 14:01:21,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-17 14:01:21,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 240. [2021-11-17 14:01:21,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 219 states have (on average 1.269406392694064) internal successors, (278), 224 states have internal predecessors, (278), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-17 14:01:21,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 303 transitions. [2021-11-17 14:01:21,439 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 303 transitions. Word has length 47 [2021-11-17 14:01:21,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 14:01:21,439 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 303 transitions. [2021-11-17 14:01:21,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 14:01:21,439 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 303 transitions. [2021-11-17 14:01:21,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-17 14:01:21,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 14:01:21,441 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 14:01:21,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-17 14:01:21,659 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 [2021-11-17 14:01:21,660 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 14:01:21,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 14:01:21,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1223367525, now seen corresponding path program 1 times [2021-11-17 14:01:21,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 14:01:21,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829433315] [2021-11-17 14:01:21,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:01:21,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 14:01:21,699 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 14:01:21,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2134863268] [2021-11-17 14:01:21,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:01:21,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 14:01:21,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 14:01:21,705 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) [2021-11-17 14:01:21,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-17 14:01:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 14:01:21,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-17 14:01:21,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 14:01:21,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 14:01:21,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 14:01:21,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 14:01:21,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829433315] [2021-11-17 14:01:21,967 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 14:01:21,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134863268] [2021-11-17 14:01:21,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134863268] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 14:01:21,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 14:01:21,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-17 14:01:21,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409880825] [2021-11-17 14:01:21,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 14:01:21,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-17 14:01:21,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 14:01:21,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-17 14:01:21,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-17 14:01:21,970 INFO L87 Difference]: Start difference. First operand 240 states and 303 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 14:01:22,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 14:01:22,045 INFO L93 Difference]: Finished difference Result 469 states and 595 transitions. [2021-11-17 14:01:22,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-17 14:01:22,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-17 14:01:22,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 14:01:22,047 INFO L225 Difference]: With dead ends: 469 [2021-11-17 14:01:22,048 INFO L226 Difference]: Without dead ends: 233 [2021-11-17 14:01:22,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-17 14:01:22,050 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 223 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-17 14:01:22,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 556 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-17 14:01:22,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-17 14:01:22,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2021-11-17 14:01:22,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 205 states have (on average 1.2536585365853659) internal successors, (257), 210 states have internal predecessors, (257), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-17 14:01:22,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 282 transitions. [2021-11-17 14:01:22,071 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 282 transitions. Word has length 47 [2021-11-17 14:01:22,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 14:01:22,075 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 282 transitions. [2021-11-17 14:01:22,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 14:01:22,076 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 282 transitions. [2021-11-17 14:01:22,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-17 14:01:22,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 14:01:22,081 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 14:01:22,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-17 14:01:22,299 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 [2021-11-17 14:01:22,300 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 14:01:22,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 14:01:22,300 INFO L85 PathProgramCache]: Analyzing trace with hash 206381993, now seen corresponding path program 1 times [2021-11-17 14:01:22,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 14:01:22,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404994216] [2021-11-17 14:01:22,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:01:22,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 14:01:22,323 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 14:01:22,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751271331] [2021-11-17 14:01:22,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:01:22,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 14:01:22,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 14:01:22,325 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) [2021-11-17 14:01:22,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-17 14:01:22,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 14:01:22,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-17 14:01:22,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 14:01:22,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 14:01:22,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 14:01:22,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 14:01:22,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404994216] [2021-11-17 14:01:22,560 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 14:01:22,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751271331] [2021-11-17 14:01:22,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751271331] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 14:01:22,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 14:01:22,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-17 14:01:22,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567118779] [2021-11-17 14:01:22,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 14:01:22,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-17 14:01:22,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 14:01:22,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-17 14:01:22,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-17 14:01:22,562 INFO L87 Difference]: Start difference. First operand 226 states and 282 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 14:01:22,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 14:01:22,602 INFO L93 Difference]: Finished difference Result 238 states and 294 transitions. [2021-11-17 14:01:22,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-17 14:01:22,602 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-17 14:01:22,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 14:01:22,604 INFO L225 Difference]: With dead ends: 238 [2021-11-17 14:01:22,604 INFO L226 Difference]: Without dead ends: 236 [2021-11-17 14:01:22,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-17 14:01:22,605 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 13 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1339 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-17 14:01:22,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 1339 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-17 14:01:22,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-17 14:01:22,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-11-17 14:01:22,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 212 states have (on average 1.25) internal successors, (265), 218 states have internal predecessors, (265), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-17 14:01:22,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 292 transitions. [2021-11-17 14:01:22,612 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 292 transitions. Word has length 47 [2021-11-17 14:01:22,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 14:01:22,613 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 292 transitions. [2021-11-17 14:01:22,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 14:01:22,613 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 292 transitions. [2021-11-17 14:01:22,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-17 14:01:22,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 14:01:22,614 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 14:01:22,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-17 14:01:22,839 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 [2021-11-17 14:01:22,840 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 14:01:22,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 14:01:22,840 INFO L85 PathProgramCache]: Analyzing trace with hash -806940807, now seen corresponding path program 1 times [2021-11-17 14:01:22,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 14:01:22,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179785004] [2021-11-17 14:01:22,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:01:22,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 14:01:22,854 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 14:01:22,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1521130467] [2021-11-17 14:01:22,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:01:22,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 14:01:22,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 14:01:22,856 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) [2021-11-17 14:01:22,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-17 14:01:23,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 14:01:23,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-17 14:01:23,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 14:01:23,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 14:01:23,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 14:01:23,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 14:01:23,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179785004] [2021-11-17 14:01:23,105 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 14:01:23,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521130467] [2021-11-17 14:01:23,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521130467] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 14:01:23,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 14:01:23,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-17 14:01:23,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325734040] [2021-11-17 14:01:23,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 14:01:23,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-17 14:01:23,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 14:01:23,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-17 14:01:23,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 14:01:23,108 INFO L87 Difference]: Start difference. First operand 236 states and 292 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 14:01:23,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 14:01:23,123 INFO L93 Difference]: Finished difference Result 469 states and 582 transitions. [2021-11-17 14:01:23,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-17 14:01:23,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-17 14:01:23,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 14:01:23,126 INFO L225 Difference]: With dead ends: 469 [2021-11-17 14:01:23,126 INFO L226 Difference]: Without dead ends: 237 [2021-11-17 14:01:23,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 14:01:23,128 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 0 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-17 14:01:23,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 541 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-17 14:01:23,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-11-17 14:01:23,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2021-11-17 14:01:23,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 213 states have (on average 1.2488262910798122) internal successors, (266), 219 states have internal predecessors, (266), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-17 14:01:23,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 293 transitions. [2021-11-17 14:01:23,137 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 293 transitions. Word has length 58 [2021-11-17 14:01:23,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 14:01:23,138 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 293 transitions. [2021-11-17 14:01:23,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 14:01:23,138 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 293 transitions. [2021-11-17 14:01:23,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-17 14:01:23,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 14:01:23,141 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 14:01:23,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-17 14:01:23,365 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 [2021-11-17 14:01:23,365 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 14:01:23,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 14:01:23,366 INFO L85 PathProgramCache]: Analyzing trace with hash -413913797, now seen corresponding path program 1 times [2021-11-17 14:01:23,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 14:01:23,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356106184] [2021-11-17 14:01:23,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:01:23,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 14:01:23,387 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 14:01:23,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1015393828] [2021-11-17 14:01:23,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:01:23,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 14:01:23,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 14:01:23,390 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) [2021-11-17 14:01:23,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-17 14:01:23,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 14:01:23,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-17 14:01:23,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 14:01:23,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 14:01:23,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 14:01:23,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 14:01:23,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356106184] [2021-11-17 14:01:23,788 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 14:01:23,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015393828] [2021-11-17 14:01:23,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015393828] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 14:01:23,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 14:01:23,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-17 14:01:23,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100930845] [2021-11-17 14:01:23,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 14:01:23,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-17 14:01:23,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 14:01:23,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-17 14:01:23,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 14:01:23,791 INFO L87 Difference]: Start difference. First operand 237 states and 293 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 14:01:23,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 14:01:23,858 INFO L93 Difference]: Finished difference Result 592 states and 736 transitions. [2021-11-17 14:01:23,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-17 14:01:23,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-17 14:01:23,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 14:01:23,860 INFO L225 Difference]: With dead ends: 592 [2021-11-17 14:01:23,860 INFO L226 Difference]: Without dead ends: 359 [2021-11-17 14:01:23,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 14:01:23,861 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 106 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-17 14:01:23,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 568 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-17 14:01:23,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-11-17 14:01:23,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 345. [2021-11-17 14:01:23,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 321 states have (on average 1.249221183800623) internal successors, (401), 327 states have internal predecessors, (401), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-17 14:01:23,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 428 transitions. [2021-11-17 14:01:23,872 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 428 transitions. Word has length 58 [2021-11-17 14:01:23,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 14:01:23,873 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 428 transitions. [2021-11-17 14:01:23,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 14:01:23,874 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 428 transitions. [2021-11-17 14:01:23,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-17 14:01:23,874 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 14:01:23,874 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] [2021-11-17 14:01:23,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-17 14:01:24,091 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 [2021-11-17 14:01:24,092 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 14:01:24,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 14:01:24,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1298801861, now seen corresponding path program 1 times [2021-11-17 14:01:24,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 14:01:24,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210177615] [2021-11-17 14:01:24,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:01:24,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 14:01:24,110 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 14:01:24,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1045892932] [2021-11-17 14:01:24,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:01:24,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 14:01:24,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 14:01:24,112 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) [2021-11-17 14:01:24,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-17 14:01:24,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 14:01:24,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-17 14:01:24,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 14:01:24,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 14:01:24,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-17 14:01:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 14:01:24,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 14:01:24,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210177615] [2021-11-17 14:01:24,601 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 14:01:24,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045892932] [2021-11-17 14:01:24,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045892932] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-17 14:01:24,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-17 14:01:24,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 9 [2021-11-17 14:01:24,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048770209] [2021-11-17 14:01:24,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 14:01:24,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-17 14:01:24,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 14:01:24,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-17 14:01:24,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-17 14:01:24,604 INFO L87 Difference]: Start difference. First operand 345 states and 428 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-17 14:01:24,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 14:01:24,758 INFO L93 Difference]: Finished difference Result 1228 states and 1566 transitions. [2021-11-17 14:01:24,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-17 14:01:24,758 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2021-11-17 14:01:24,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 14:01:24,765 INFO L225 Difference]: With dead ends: 1228 [2021-11-17 14:01:24,765 INFO L226 Difference]: Without dead ends: 932 [2021-11-17 14:01:24,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-17 14:01:24,767 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 1692 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1692 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-17 14:01:24,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1692 Valid, 855 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-17 14:01:24,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2021-11-17 14:01:24,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 573. [2021-11-17 14:01:24,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 544 states have (on average 1.2610294117647058) internal successors, (686), 550 states have internal predecessors, (686), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (16), 13 states have call predecessors, (16), 15 states have call successors, (16) [2021-11-17 14:01:24,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 718 transitions. [2021-11-17 14:01:24,791 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 718 transitions. Word has length 62 [2021-11-17 14:01:24,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 14:01:24,792 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 718 transitions. [2021-11-17 14:01:24,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-17 14:01:24,792 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 718 transitions. [2021-11-17 14:01:24,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-17 14:01:24,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 14:01:24,793 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 14:01:24,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-17 14:01:25,007 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 [2021-11-17 14:01:25,007 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 14:01:25,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 14:01:25,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1545086991, now seen corresponding path program 1 times [2021-11-17 14:01:25,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 14:01:25,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366344295] [2021-11-17 14:01:25,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:01:25,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 14:01:25,044 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 14:01:25,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009677877] [2021-11-17 14:01:25,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:01:25,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 14:01:25,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 14:01:25,048 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) [2021-11-17 14:01:25,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-17 14:01:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 14:01:25,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-17 14:01:25,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 14:01:25,400 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-17 14:01:25,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 14:01:25,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 14:01:25,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366344295] [2021-11-17 14:01:25,401 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 14:01:25,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009677877] [2021-11-17 14:01:25,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009677877] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 14:01:25,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 14:01:25,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-17 14:01:25,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389231613] [2021-11-17 14:01:25,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 14:01:25,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-17 14:01:25,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 14:01:25,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-17 14:01:25,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-17 14:01:25,404 INFO L87 Difference]: Start difference. First operand 573 states and 718 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-17 14:01:25,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 14:01:25,479 INFO L93 Difference]: Finished difference Result 1078 states and 1360 transitions. [2021-11-17 14:01:25,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-17 14:01:25,480 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 93 [2021-11-17 14:01:25,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 14:01:25,482 INFO L225 Difference]: With dead ends: 1078 [2021-11-17 14:01:25,483 INFO L226 Difference]: Without dead ends: 573 [2021-11-17 14:01:25,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-17 14:01:25,484 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 25 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-17 14:01:25,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 991 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-17 14:01:25,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-11-17 14:01:25,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 573. [2021-11-17 14:01:25,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 544 states have (on average 1.2610294117647058) internal successors, (686), 550 states have internal predecessors, (686), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-17 14:01:25,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 717 transitions. [2021-11-17 14:01:25,501 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 717 transitions. Word has length 93 [2021-11-17 14:01:25,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 14:01:25,501 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 717 transitions. [2021-11-17 14:01:25,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-17 14:01:25,501 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 717 transitions. [2021-11-17 14:01:25,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-17 14:01:25,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 14:01:25,502 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 14:01:25,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-17 14:01:25,708 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 [2021-11-17 14:01:25,709 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 14:01:25,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 14:01:25,709 INFO L85 PathProgramCache]: Analyzing trace with hash -441690957, now seen corresponding path program 1 times [2021-11-17 14:01:25,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 14:01:25,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244063749] [2021-11-17 14:01:25,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:01:25,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 14:01:25,721 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 14:01:25,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659937415] [2021-11-17 14:01:25,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:01:25,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 14:01:25,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 14:01:25,723 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) [2021-11-17 14:01:25,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-17 14:01:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 14:01:25,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-17 14:01:25,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 14:01:26,023 INFO L388 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 [2021-11-17 14:01:26,035 INFO L388 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 [2021-11-17 14:01:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-17 14:01:26,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 14:01:26,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 14:01:26,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244063749] [2021-11-17 14:01:26,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 14:01:26,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659937415] [2021-11-17 14:01:26,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659937415] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 14:01:26,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 14:01:26,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-17 14:01:26,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079135952] [2021-11-17 14:01:26,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 14:01:26,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-17 14:01:26,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 14:01:26,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-17 14:01:26,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-17 14:01:26,046 INFO L87 Difference]: Start difference. First operand 573 states and 717 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-17 14:01:26,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 14:01:26,263 INFO L93 Difference]: Finished difference Result 757 states and 966 transitions. [2021-11-17 14:01:26,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-17 14:01:26,265 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 98 [2021-11-17 14:01:26,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 14:01:26,268 INFO L225 Difference]: With dead ends: 757 [2021-11-17 14:01:26,268 INFO L226 Difference]: Without dead ends: 744 [2021-11-17 14:01:26,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-17 14:01:26,269 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 140 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-17 14:01:26,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 704 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-17 14:01:26,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-11-17 14:01:26,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 577. [2021-11-17 14:01:26,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 548 states have (on average 1.2591240875912408) internal successors, (690), 554 states have internal predecessors, (690), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-17 14:01:26,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 721 transitions. [2021-11-17 14:01:26,285 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 721 transitions. Word has length 98 [2021-11-17 14:01:26,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 14:01:26,286 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 721 transitions. [2021-11-17 14:01:26,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-17 14:01:26,286 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 721 transitions. [2021-11-17 14:01:26,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-17 14:01:26,287 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 14:01:26,287 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 14:01:26,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-17 14:01:26,507 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 [2021-11-17 14:01:26,508 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 14:01:26,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 14:01:26,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1451857612, now seen corresponding path program 1 times [2021-11-17 14:01:26,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 14:01:26,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421239930] [2021-11-17 14:01:26,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:01:26,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 14:01:26,522 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 14:01:26,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997029575] [2021-11-17 14:01:26,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:01:26,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 14:01:26,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 14:01:26,524 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) [2021-11-17 14:01:26,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-17 14:01:26,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 14:01:26,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-17 14:01:26,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 14:01:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-17 14:01:26,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 14:01:26,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 14:01:26,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421239930] [2021-11-17 14:01:26,991 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 14:01:26,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997029575] [2021-11-17 14:01:26,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997029575] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 14:01:26,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 14:01:26,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-17 14:01:26,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965849119] [2021-11-17 14:01:26,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 14:01:26,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-17 14:01:26,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 14:01:26,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-17 14:01:26,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-17 14:01:26,993 INFO L87 Difference]: Start difference. First operand 577 states and 721 transitions. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-17 14:01:27,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 14:01:27,099 INFO L93 Difference]: Finished difference Result 1094 states and 1379 transitions. [2021-11-17 14:01:27,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-17 14:01:27,099 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 110 [2021-11-17 14:01:27,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 14:01:27,102 INFO L225 Difference]: With dead ends: 1094 [2021-11-17 14:01:27,102 INFO L226 Difference]: Without dead ends: 582 [2021-11-17 14:01:27,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-17 14:01:27,104 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 18 mSDsluCounter, 1532 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1792 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-17 14:01:27,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 1792 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-17 14:01:27,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-11-17 14:01:27,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 582. [2021-11-17 14:01:27,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 552 states have (on average 1.2590579710144927) internal successors, (695), 559 states have internal predecessors, (695), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (16), 13 states have call predecessors, (16), 15 states have call successors, (16) [2021-11-17 14:01:27,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 727 transitions. [2021-11-17 14:01:27,122 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 727 transitions. Word has length 110 [2021-11-17 14:01:27,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 14:01:27,122 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 727 transitions. [2021-11-17 14:01:27,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-17 14:01:27,123 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 727 transitions. [2021-11-17 14:01:27,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-17 14:01:27,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 14:01:27,124 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2021-11-17 14:01:27,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-17 14:01:27,347 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 [2021-11-17 14:01:27,347 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 14:01:27,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 14:01:27,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1710945854, now seen corresponding path program 1 times [2021-11-17 14:01:27,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 14:01:27,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342470782] [2021-11-17 14:01:27,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:01:27,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 14:01:27,359 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 14:01:27,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410633488] [2021-11-17 14:01:27,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:01:27,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 14:01:27,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 14:01:27,361 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) [2021-11-17 14:01:27,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-17 14:01:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 14:01:27,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-17 14:01:27,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 14:01:27,847 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-17 14:01:27,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-17 14:01:28,139 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-17 14:01:28,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 14:01:28,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342470782] [2021-11-17 14:01:28,139 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 14:01:28,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410633488] [2021-11-17 14:01:28,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410633488] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-17 14:01:28,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-17 14:01:28,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2021-11-17 14:01:28,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760781960] [2021-11-17 14:01:28,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-17 14:01:28,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-17 14:01:28,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 14:01:28,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-17 14:01:28,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-17 14:01:28,141 INFO L87 Difference]: Start difference. First operand 582 states and 727 transitions. Second operand has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-17 14:01:28,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 14:01:28,367 INFO L93 Difference]: Finished difference Result 1117 states and 1411 transitions. [2021-11-17 14:01:28,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-17 14:01:28,368 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 112 [2021-11-17 14:01:28,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 14:01:28,370 INFO L225 Difference]: With dead ends: 1117 [2021-11-17 14:01:28,370 INFO L226 Difference]: Without dead ends: 598 [2021-11-17 14:01:28,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-11-17 14:01:28,372 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 31 mSDsluCounter, 2048 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 2309 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-17 14:01:28,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 2309 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-17 14:01:28,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-11-17 14:01:28,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 595. [2021-11-17 14:01:28,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 564 states have (on average 1.2641843971631206) internal successors, (713), 571 states have internal predecessors, (713), 16 states have call successors, (16), 10 states have call predecessors, (16), 11 states have return successors, (16), 13 states have call predecessors, (16), 15 states have call successors, (16) [2021-11-17 14:01:28,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 745 transitions. [2021-11-17 14:01:28,389 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 745 transitions. Word has length 112 [2021-11-17 14:01:28,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 14:01:28,389 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 745 transitions. [2021-11-17 14:01:28,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-17 14:01:28,389 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 745 transitions. [2021-11-17 14:01:28,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-17 14:01:28,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 14:01:28,391 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 14:01:28,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-17 14:01:28,603 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 [2021-11-17 14:01:28,603 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 14:01:28,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 14:01:28,604 INFO L85 PathProgramCache]: Analyzing trace with hash 2135958996, now seen corresponding path program 2 times [2021-11-17 14:01:28,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 14:01:28,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976174382] [2021-11-17 14:01:28,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:01:28,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 14:01:28,617 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 14:01:28,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685259074] [2021-11-17 14:01:28,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-17 14:01:28,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 14:01:28,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 14:01:28,618 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) [2021-11-17 14:01:28,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-17 14:01:29,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-17 14:01:29,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-17 14:01:29,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-17 14:01:29,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 14:01:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-17 14:01:30,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-17 14:01:30,668 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-17 14:01:30,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 14:01:30,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976174382] [2021-11-17 14:01:30,668 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 14:01:30,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685259074] [2021-11-17 14:01:30,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685259074] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-17 14:01:30,669 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-17 14:01:30,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2021-11-17 14:01:30,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192501947] [2021-11-17 14:01:30,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-17 14:01:30,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-17 14:01:30,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 14:01:30,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-17 14:01:30,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-11-17 14:01:30,670 INFO L87 Difference]: Start difference. First operand 595 states and 745 transitions. Second operand has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-17 14:01:31,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 14:01:31,606 INFO L93 Difference]: Finished difference Result 1210 states and 1528 transitions. [2021-11-17 14:01:31,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-17 14:01:31,606 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 116 [2021-11-17 14:01:31,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 14:01:31,610 INFO L225 Difference]: With dead ends: 1210 [2021-11-17 14:01:31,610 INFO L226 Difference]: Without dead ends: 613 [2021-11-17 14:01:31,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2021-11-17 14:01:31,613 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 285 mSDsluCounter, 2831 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 3090 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-17 14:01:31,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 3090 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-17 14:01:31,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-11-17 14:01:31,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 601. [2021-11-17 14:01:31,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 570 states have (on average 1.2614035087719297) internal successors, (719), 577 states have internal predecessors, (719), 16 states have call successors, (16), 10 states have call predecessors, (16), 11 states have return successors, (16), 13 states have call predecessors, (16), 15 states have call successors, (16) [2021-11-17 14:01:31,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 751 transitions. [2021-11-17 14:01:31,633 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 751 transitions. Word has length 116 [2021-11-17 14:01:31,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 14:01:31,634 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 751 transitions. [2021-11-17 14:01:31,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-17 14:01:31,634 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 751 transitions. [2021-11-17 14:01:31,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-17 14:01:31,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 14:01:31,635 INFO L514 BasicCegarLoop]: trace histogram [15, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 14:01:31,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-17 14:01:31,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-17 14:01:31,848 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 14:01:31,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 14:01:31,849 INFO L85 PathProgramCache]: Analyzing trace with hash -224218713, now seen corresponding path program 3 times [2021-11-17 14:01:31,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 14:01:31,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338127692] [2021-11-17 14:01:31,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:01:31,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 14:01:31,862 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 14:01:31,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [802791486] [2021-11-17 14:01:31,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-17 14:01:31,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 14:01:31,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 14:01:31,864 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-17 14:01:31,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process Killed by 15