./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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_test2-1.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 f0735ebc421a940bb70b06777060abaef432af6ff0cfdeb82bfa2e45a81b4e11 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 15:52:10,597 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 15:52:10,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 15:52:10,623 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 15:52:10,624 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 15:52:10,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 15:52:10,626 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 15:52:10,628 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 15:52:10,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 15:52:10,641 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 15:52:10,642 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 15:52:10,644 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 15:52:10,646 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 15:52:10,648 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 15:52:10,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 15:52:10,652 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 15:52:10,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 15:52:10,656 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 15:52:10,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 15:52:10,662 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 15:52:10,663 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 15:52:10,666 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 15:52:10,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 15:52:10,670 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 15:52:10,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 15:52:10,673 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 15:52:10,675 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 15:52:10,676 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 15:52:10,676 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 15:52:10,677 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 15:52:10,677 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 15:52:10,678 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 15:52:10,678 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 15:52:10,679 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 15:52:10,680 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 15:52:10,681 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 15:52:10,681 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 15:52:10,682 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 15:52:10,682 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 15:52:10,683 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 15:52:10,683 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 15:52:10,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 15:52:10,687 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 15:52:10,722 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 15:52:10,723 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 15:52:10,723 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 15:52:10,723 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 15:52:10,724 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 15:52:10,724 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 15:52:10,725 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 15:52:10,725 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 15:52:10,725 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 15:52:10,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 15:52:10,726 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 15:52:10,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 15:52:10,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 15:52:10,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 15:52:10,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 15:52:10,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 15:52:10,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 15:52:10,728 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 15:52:10,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 15:52:10,728 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 15:52:10,728 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 15:52:10,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 15:52:10,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 15:52:10,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 15:52:10,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 15:52:10,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 15:52:10,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 15:52:10,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 15:52:10,730 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 15:52:10,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 15:52:10,731 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 15:52:10,731 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 15:52:10,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 15:52:10,731 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0735ebc421a940bb70b06777060abaef432af6ff0cfdeb82bfa2e45a81b4e11 [2022-07-21 15:52:11,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 15:52:11,060 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 15:52:11,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 15:52:11,063 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 15:52:11,068 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 15:52:11,070 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-1.i [2022-07-21 15:52:11,120 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9ac17f9d/b2b5c9be520f42bd858e94101dc559ec/FLAG03485ea52 [2022-07-21 15:52:11,627 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 15:52:11,627 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-1.i [2022-07-21 15:52:11,645 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9ac17f9d/b2b5c9be520f42bd858e94101dc559ec/FLAG03485ea52 [2022-07-21 15:52:12,144 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9ac17f9d/b2b5c9be520f42bd858e94101dc559ec [2022-07-21 15:52:12,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 15:52:12,147 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 15:52:12,150 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 15:52:12,150 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 15:52:12,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 15:52:12,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:52:12" (1/1) ... [2022-07-21 15:52:12,163 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b8cf401 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:52:12, skipping insertion in model container [2022-07-21 15:52:12,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:52:12" (1/1) ... [2022-07-21 15:52:12,169 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 15:52:12,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 15:52:12,655 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_test2-1.i[37019,37032] [2022-07-21 15:52:12,762 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_test2-1.i[47352,47365] [2022-07-21 15:52:12,771 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 15:52:12,783 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 15:52:12,823 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_test2-1.i[37019,37032] [2022-07-21 15:52:12,880 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_test2-1.i[47352,47365] [2022-07-21 15:52:12,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 15:52:12,931 INFO L208 MainTranslator]: Completed translation [2022-07-21 15:52:12,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:52:12 WrapperNode [2022-07-21 15:52:12,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 15:52:12,933 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 15:52:12,933 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 15:52:12,933 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 15:52:12,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:52:12" (1/1) ... [2022-07-21 15:52:12,963 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:52:12" (1/1) ... [2022-07-21 15:52:13,026 INFO L137 Inliner]: procedures = 208, calls = 235, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 884 [2022-07-21 15:52:13,027 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 15:52:13,028 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 15:52:13,028 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 15:52:13,028 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 15:52:13,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:52:12" (1/1) ... [2022-07-21 15:52:13,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:52:12" (1/1) ... [2022-07-21 15:52:13,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:52:12" (1/1) ... [2022-07-21 15:52:13,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:52:12" (1/1) ... [2022-07-21 15:52:13,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:52:12" (1/1) ... [2022-07-21 15:52:13,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:52:12" (1/1) ... [2022-07-21 15:52:13,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:52:12" (1/1) ... [2022-07-21 15:52:13,162 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 15:52:13,169 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 15:52:13,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 15:52:13,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 15:52:13,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:52:12" (1/1) ... [2022-07-21 15:52:13,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 15:52:13,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 15:52:13,208 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) [2022-07-21 15:52:13,235 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 [2022-07-21 15:52:13,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-21 15:52:13,255 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-21 15:52:13,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 15:52:13,258 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-07-21 15:52:13,258 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 15:52:13,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 15:52:13,258 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 15:52:13,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 15:52:13,259 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 15:52:13,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 15:52:13,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 15:52:13,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 15:52:13,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 15:52:13,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 15:52:13,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 15:52:13,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 15:52:13,463 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 15:52:13,465 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 15:52:14,388 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 15:52:14,395 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 15:52:14,395 INFO L299 CfgBuilder]: Removed 54 assume(true) statements. [2022-07-21 15:52:14,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:52:14 BoogieIcfgContainer [2022-07-21 15:52:14,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 15:52:14,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 15:52:14,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 15:52:14,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 15:52:14,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:52:12" (1/3) ... [2022-07-21 15:52:14,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b197ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:52:14, skipping insertion in model container [2022-07-21 15:52:14,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:52:12" (2/3) ... [2022-07-21 15:52:14,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b197ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:52:14, skipping insertion in model container [2022-07-21 15:52:14,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:52:14" (3/3) ... [2022-07-21 15:52:14,403 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_BER_test2-1.i [2022-07-21 15:52:14,422 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 15:52:14,422 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-21 15:52:14,461 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 15:52:14,467 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4de92152, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@78157c57 [2022-07-21 15:52:14,467 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 15:52:14,471 INFO L276 IsEmpty]: Start isEmpty. Operand has 177 states, 164 states have (on average 1.6890243902439024) internal successors, (277), 171 states have internal predecessors, (277), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 15:52:14,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 15:52:14,476 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 15:52:14,477 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 15:52:14,477 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 15:52:14,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 15:52:14,481 INFO L85 PathProgramCache]: Analyzing trace with hash -858859523, now seen corresponding path program 1 times [2022-07-21 15:52:14,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 15:52:14,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333666909] [2022-07-21 15:52:14,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:52:14,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 15:52:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 15:52:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 15:52:14,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 15:52:14,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333666909] [2022-07-21 15:52:14,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333666909] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 15:52:14,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 15:52:14,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 15:52:14,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674134833] [2022-07-21 15:52:14,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 15:52:14,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 15:52:14,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 15:52:14,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 15:52:14,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 15:52:14,631 INFO L87 Difference]: Start difference. First operand has 177 states, 164 states have (on average 1.6890243902439024) internal successors, (277), 171 states have internal predecessors, (277), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-07-21 15:52:14,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 15:52:14,665 INFO L93 Difference]: Finished difference Result 352 states and 589 transitions. [2022-07-21 15:52:14,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 15:52:14,667 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2022-07-21 15:52:14,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 15:52:14,674 INFO L225 Difference]: With dead ends: 352 [2022-07-21 15:52:14,675 INFO L226 Difference]: Without dead ends: 173 [2022-07-21 15:52:14,678 INFO L412 NwaCegarLoop]: 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 [2022-07-21 15:52:14,680 INFO L413 NwaCegarLoop]: 233 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, 233 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 [2022-07-21 15:52:14,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 15:52:14,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-07-21 15:52:14,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-07-21 15:52:14,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 161 states have (on average 1.3229813664596273) internal successors, (213), 167 states have internal predecessors, (213), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 15:52:14,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 229 transitions. [2022-07-21 15:52:14,721 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 229 transitions. Word has length 9 [2022-07-21 15:52:14,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 15:52:14,721 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 229 transitions. [2022-07-21 15:52:14,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-07-21 15:52:14,722 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 229 transitions. [2022-07-21 15:52:14,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-21 15:52:14,724 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 15:52:14,724 INFO L195 NwaCegarLoop]: 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] [2022-07-21 15:52:14,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 15:52:14,724 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 15:52:14,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 15:52:14,725 INFO L85 PathProgramCache]: Analyzing trace with hash -294026559, now seen corresponding path program 1 times [2022-07-21 15:52:14,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 15:52:14,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035895248] [2022-07-21 15:52:14,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:52:14,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 15:52:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 15:52:14,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 15:52:14,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 15:52:14,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035895248] [2022-07-21 15:52:14,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035895248] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 15:52:14,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 15:52:14,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 15:52:14,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330678559] [2022-07-21 15:52:14,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 15:52:14,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 15:52:14,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 15:52:14,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 15:52:14,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 15:52:14,803 INFO L87 Difference]: Start difference. First operand 173 states and 229 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2022-07-21 15:52:15,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 15:52:15,120 INFO L93 Difference]: Finished difference Result 363 states and 489 transitions. [2022-07-21 15:52:15,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 15:52:15,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 44 [2022-07-21 15:52:15,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 15:52:15,124 INFO L225 Difference]: With dead ends: 363 [2022-07-21 15:52:15,124 INFO L226 Difference]: Without dead ends: 284 [2022-07-21 15:52:15,125 INFO L412 NwaCegarLoop]: 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 [2022-07-21 15:52:15,126 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 138 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 15:52:15,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 548 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 15:52:15,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-07-21 15:52:15,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 175. [2022-07-21 15:52:15,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 163 states have (on average 1.3190184049079754) internal successors, (215), 169 states have internal predecessors, (215), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 15:52:15,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 231 transitions. [2022-07-21 15:52:15,153 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 231 transitions. Word has length 44 [2022-07-21 15:52:15,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 15:52:15,153 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 231 transitions. [2022-07-21 15:52:15,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2022-07-21 15:52:15,154 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 231 transitions. [2022-07-21 15:52:15,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-21 15:52:15,157 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 15:52:15,157 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 15:52:15,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 15:52:15,158 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 15:52:15,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 15:52:15,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1509402797, now seen corresponding path program 1 times [2022-07-21 15:52:15,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 15:52:15,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562627292] [2022-07-21 15:52:15,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:52:15,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 15:52:15,330 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 15:52:15,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801217012] [2022-07-21 15:52:15,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:52:15,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:52:15,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 15:52:15,334 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) [2022-07-21 15:52:15,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 15:52:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 15:52:15,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 15:52:15,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 15:52:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 15:52:15,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 15:52:15,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 15:52:15,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562627292] [2022-07-21 15:52:15,976 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 15:52:15,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801217012] [2022-07-21 15:52:15,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801217012] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 15:52:15,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 15:52:15,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 15:52:15,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586986638] [2022-07-21 15:52:15,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 15:52:15,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 15:52:15,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 15:52:15,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 15:52:15,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 15:52:15,979 INFO L87 Difference]: Start difference. First operand 175 states and 231 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2022-07-21 15:52:16,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 15:52:16,031 INFO L93 Difference]: Finished difference Result 367 states and 489 transitions. [2022-07-21 15:52:16,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 15:52:16,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 96 [2022-07-21 15:52:16,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 15:52:16,033 INFO L225 Difference]: With dead ends: 367 [2022-07-21 15:52:16,033 INFO L226 Difference]: Without dead ends: 196 [2022-07-21 15:52:16,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 15:52:16,035 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 9 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 403 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 [2022-07-21 15:52:16,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 403 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 15:52:16,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-07-21 15:52:16,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2022-07-21 15:52:16,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 183 states have (on average 1.284153005464481) internal successors, (235), 189 states have internal predecessors, (235), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 15:52:16,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 251 transitions. [2022-07-21 15:52:16,046 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 251 transitions. Word has length 96 [2022-07-21 15:52:16,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 15:52:16,046 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 251 transitions. [2022-07-21 15:52:16,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2022-07-21 15:52:16,047 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 251 transitions. [2022-07-21 15:52:16,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-21 15:52:16,048 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 15:52:16,048 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 15:52:16,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 15:52:16,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:52:16,269 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 15:52:16,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 15:52:16,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1482337195, now seen corresponding path program 1 times [2022-07-21 15:52:16,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 15:52:16,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541044646] [2022-07-21 15:52:16,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:52:16,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 15:52:16,378 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 15:52:16,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [459427013] [2022-07-21 15:52:16,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:52:16,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:52:16,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 15:52:16,381 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) [2022-07-21 15:52:16,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 15:52:17,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 15:52:17,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 1651 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 15:52:17,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 15:52:17,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 15:52:17,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 15:52:17,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 15:52:17,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541044646] [2022-07-21 15:52:17,071 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 15:52:17,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459427013] [2022-07-21 15:52:17,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459427013] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 15:52:17,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 15:52:17,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 15:52:17,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064946780] [2022-07-21 15:52:17,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 15:52:17,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 15:52:17,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 15:52:17,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 15:52:17,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 15:52:17,078 INFO L87 Difference]: Start difference. First operand 195 states and 251 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2022-07-21 15:52:17,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 15:52:17,142 INFO L93 Difference]: Finished difference Result 294 states and 388 transitions. [2022-07-21 15:52:17,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 15:52:17,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 96 [2022-07-21 15:52:17,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 15:52:17,145 INFO L225 Difference]: With dead ends: 294 [2022-07-21 15:52:17,145 INFO L226 Difference]: Without dead ends: 216 [2022-07-21 15:52:17,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 15:52:17,147 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 8 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 15:52:17,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 405 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 15:52:17,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-07-21 15:52:17,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2022-07-21 15:52:17,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 203 states have (on average 1.2561576354679802) internal successors, (255), 209 states have internal predecessors, (255), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 15:52:17,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 271 transitions. [2022-07-21 15:52:17,166 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 271 transitions. Word has length 96 [2022-07-21 15:52:17,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 15:52:17,167 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 271 transitions. [2022-07-21 15:52:17,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2022-07-21 15:52:17,167 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 271 transitions. [2022-07-21 15:52:17,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-21 15:52:17,169 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 15:52:17,169 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 15:52:17,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 15:52:17,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-21 15:52:17,376 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 15:52:17,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 15:52:17,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1801512851, now seen corresponding path program 1 times [2022-07-21 15:52:17,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 15:52:17,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563786226] [2022-07-21 15:52:17,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:52:17,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 15:52:17,529 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 15:52:17,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218647283] [2022-07-21 15:52:17,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:52:17,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:52:17,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 15:52:17,536 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) [2022-07-21 15:52:17,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 15:52:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 15:52:18,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 1653 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 15:52:18,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 15:52:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 15:52:18,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 15:52:18,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 15:52:18,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563786226] [2022-07-21 15:52:18,274 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 15:52:18,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218647283] [2022-07-21 15:52:18,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218647283] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 15:52:18,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 15:52:18,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 15:52:18,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557871275] [2022-07-21 15:52:18,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 15:52:18,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 15:52:18,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 15:52:18,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 15:52:18,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 15:52:18,276 INFO L87 Difference]: Start difference. First operand 215 states and 271 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2022-07-21 15:52:18,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 15:52:18,344 INFO L93 Difference]: Finished difference Result 418 states and 530 transitions. [2022-07-21 15:52:18,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 15:52:18,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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 96 [2022-07-21 15:52:18,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 15:52:18,346 INFO L225 Difference]: With dead ends: 418 [2022-07-21 15:52:18,346 INFO L226 Difference]: Without dead ends: 207 [2022-07-21 15:52:18,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 15:52:18,348 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 192 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 431 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 [2022-07-21 15:52:18,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 431 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 15:52:18,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-07-21 15:52:18,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 201. [2022-07-21 15:52:18,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 189 states have (on average 1.2380952380952381) internal successors, (234), 195 states have internal predecessors, (234), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 15:52:18,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 250 transitions. [2022-07-21 15:52:18,368 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 250 transitions. Word has length 96 [2022-07-21 15:52:18,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 15:52:18,369 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 250 transitions. [2022-07-21 15:52:18,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2022-07-21 15:52:18,369 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 250 transitions. [2022-07-21 15:52:18,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-21 15:52:18,375 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 15:52:18,376 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 15:52:18,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 15:52:18,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:52:18,576 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 15:52:18,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 15:52:18,577 INFO L85 PathProgramCache]: Analyzing trace with hash 432355323, now seen corresponding path program 1 times [2022-07-21 15:52:18,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 15:52:18,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939168258] [2022-07-21 15:52:18,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:52:18,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 15:52:18,690 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 15:52:18,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327029618] [2022-07-21 15:52:18,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:52:18,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:52:18,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 15:52:18,695 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) [2022-07-21 15:52:18,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 15:52:19,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 15:52:19,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 1639 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 15:52:19,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 15:52:19,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 15:52:19,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 15:52:19,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 15:52:19,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939168258] [2022-07-21 15:52:19,477 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 15:52:19,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327029618] [2022-07-21 15:52:19,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327029618] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 15:52:19,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 15:52:19,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 15:52:19,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940412580] [2022-07-21 15:52:19,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 15:52:19,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 15:52:19,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 15:52:19,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 15:52:19,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 15:52:19,479 INFO L87 Difference]: Start difference. First operand 201 states and 250 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 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) [2022-07-21 15:52:19,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 15:52:19,554 INFO L93 Difference]: Finished difference Result 291 states and 368 transitions. [2022-07-21 15:52:19,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 15:52:19,555 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 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 96 [2022-07-21 15:52:19,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 15:52:19,558 INFO L225 Difference]: With dead ends: 291 [2022-07-21 15:52:19,559 INFO L226 Difference]: Without dead ends: 193 [2022-07-21 15:52:19,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 15:52:19,562 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 76 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 15:52:19,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 518 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 15:52:19,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-07-21 15:52:19,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 187. [2022-07-21 15:52:19,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 175 states have (on average 1.217142857142857) internal successors, (213), 181 states have internal predecessors, (213), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 15:52:19,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 229 transitions. [2022-07-21 15:52:19,573 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 229 transitions. Word has length 96 [2022-07-21 15:52:19,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 15:52:19,574 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 229 transitions. [2022-07-21 15:52:19,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 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) [2022-07-21 15:52:19,574 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 229 transitions. [2022-07-21 15:52:19,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-21 15:52:19,576 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 15:52:19,577 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 15:52:19,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 15:52:19,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:52:19,798 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 15:52:19,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 15:52:19,799 INFO L85 PathProgramCache]: Analyzing trace with hash -725253137, now seen corresponding path program 1 times [2022-07-21 15:52:19,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 15:52:19,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900593280] [2022-07-21 15:52:19,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:52:19,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 15:52:19,922 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 15:52:19,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232994294] [2022-07-21 15:52:19,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:52:19,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:52:19,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 15:52:19,927 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) [2022-07-21 15:52:19,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 15:52:20,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 15:52:20,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 1627 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 15:52:20,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 15:52:20,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 15:52:20,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 15:52:20,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 15:52:20,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900593280] [2022-07-21 15:52:20,806 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 15:52:20,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232994294] [2022-07-21 15:52:20,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232994294] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 15:52:20,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 15:52:20,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 15:52:20,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132687877] [2022-07-21 15:52:20,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 15:52:20,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 15:52:20,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 15:52:20,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 15:52:20,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 15:52:20,809 INFO L87 Difference]: Start difference. First operand 187 states and 229 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2022-07-21 15:52:20,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 15:52:20,880 INFO L93 Difference]: Finished difference Result 476 states and 582 transitions. [2022-07-21 15:52:20,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 15:52:20,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 96 [2022-07-21 15:52:20,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 15:52:20,883 INFO L225 Difference]: With dead ends: 476 [2022-07-21 15:52:20,883 INFO L226 Difference]: Without dead ends: 293 [2022-07-21 15:52:20,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 15:52:20,884 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 75 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 15:52:20,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 454 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 15:52:20,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-07-21 15:52:20,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 291. [2022-07-21 15:52:20,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 274 states have (on average 1.197080291970803) internal successors, (328), 285 states have internal predecessors, (328), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-21 15:52:20,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 354 transitions. [2022-07-21 15:52:20,893 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 354 transitions. Word has length 96 [2022-07-21 15:52:20,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 15:52:20,894 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 354 transitions. [2022-07-21 15:52:20,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2022-07-21 15:52:20,894 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 354 transitions. [2022-07-21 15:52:20,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-21 15:52:20,895 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 15:52:20,895 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 15:52:20,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 15:52:21,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:52:21,116 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 15:52:21,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 15:52:21,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1015837155, now seen corresponding path program 1 times [2022-07-21 15:52:21,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 15:52:21,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251060536] [2022-07-21 15:52:21,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:52:21,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 15:52:21,164 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 15:52:21,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [876189622] [2022-07-21 15:52:21,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:52:21,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:52:21,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 15:52:21,168 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) [2022-07-21 15:52:21,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 15:52:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 15:52:21,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 15:52:21,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 15:52:21,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 15:52:21,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 15:52:21,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 15:52:21,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251060536] [2022-07-21 15:52:21,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 15:52:21,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876189622] [2022-07-21 15:52:21,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876189622] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 15:52:21,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 15:52:21,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 15:52:21,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282669062] [2022-07-21 15:52:21,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 15:52:21,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 15:52:21,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 15:52:21,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 15:52:21,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 15:52:21,864 INFO L87 Difference]: Start difference. First operand 291 states and 354 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 15:52:22,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 15:52:22,015 INFO L93 Difference]: Finished difference Result 474 states and 579 transitions. [2022-07-21 15:52:22,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 15:52:22,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2022-07-21 15:52:22,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 15:52:22,017 INFO L225 Difference]: With dead ends: 474 [2022-07-21 15:52:22,017 INFO L226 Difference]: Without dead ends: 231 [2022-07-21 15:52:22,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 15:52:22,018 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 274 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 15:52:22,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 299 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 15:52:22,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-21 15:52:22,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-07-21 15:52:22,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 219 states have (on average 1.187214611872146) internal successors, (260), 225 states have internal predecessors, (260), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 15:52:22,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 276 transitions. [2022-07-21 15:52:22,026 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 276 transitions. Word has length 111 [2022-07-21 15:52:22,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 15:52:22,027 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 276 transitions. [2022-07-21 15:52:22,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 15:52:22,027 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 276 transitions. [2022-07-21 15:52:22,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-21 15:52:22,028 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 15:52:22,028 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 15:52:22,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-21 15:52:22,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:52:22,252 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 15:52:22,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 15:52:22,253 INFO L85 PathProgramCache]: Analyzing trace with hash 379973459, now seen corresponding path program 1 times [2022-07-21 15:52:22,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 15:52:22,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704304603] [2022-07-21 15:52:22,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:52:22,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 15:52:22,307 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 15:52:22,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1953663447] [2022-07-21 15:52:22,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:52:22,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:52:22,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 15:52:22,344 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) [2022-07-21 15:52:22,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 15:52:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 15:52:53,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 15:52:53,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 15:52:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 15:52:53,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 15:52:53,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 15:52:53,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704304603] [2022-07-21 15:52:53,989 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 15:52:53,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953663447] [2022-07-21 15:52:53,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953663447] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 15:52:53,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 15:52:53,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 15:52:53,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912145697] [2022-07-21 15:52:53,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 15:52:53,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 15:52:53,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 15:52:53,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 15:52:53,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 15:52:53,992 INFO L87 Difference]: Start difference. First operand 231 states and 276 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 15:52:54,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 15:52:54,024 INFO L93 Difference]: Finished difference Result 414 states and 501 transitions. [2022-07-21 15:52:54,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 15:52:54,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 118 [2022-07-21 15:52:54,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 15:52:54,027 INFO L225 Difference]: With dead ends: 414 [2022-07-21 15:52:54,027 INFO L226 Difference]: Without dead ends: 234 [2022-07-21 15:52:54,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 15:52:54,030 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 2 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 15:52:54,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 629 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 15:52:54,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-07-21 15:52:54,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2022-07-21 15:52:54,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 221 states have (on average 1.1900452488687783) internal successors, (263), 228 states have internal predecessors, (263), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-21 15:52:54,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 280 transitions. [2022-07-21 15:52:54,043 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 280 transitions. Word has length 118 [2022-07-21 15:52:54,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 15:52:54,044 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 280 transitions. [2022-07-21 15:52:54,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 15:52:54,044 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 280 transitions. [2022-07-21 15:52:54,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-21 15:52:54,045 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 15:52:54,045 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 15:52:54,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 15:52:54,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:52:54,268 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 15:52:54,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 15:52:54,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1827414795, now seen corresponding path program 1 times [2022-07-21 15:52:54,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 15:52:54,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791657155] [2022-07-21 15:52:54,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:52:54,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 15:52:54,309 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 15:52:54,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1249343604] [2022-07-21 15:52:54,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:52:54,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:52:54,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 15:52:54,311 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) [2022-07-21 15:52:54,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 15:53:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 15:53:35,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 15:53:35,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 15:53:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 15:53:35,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 15:53:35,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 15:53:35,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 15:53:35,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791657155] [2022-07-21 15:53:35,199 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 15:53:35,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249343604] [2022-07-21 15:53:35,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249343604] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 15:53:35,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 15:53:35,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-21 15:53:35,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498671184] [2022-07-21 15:53:35,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 15:53:35,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 15:53:35,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 15:53:35,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 15:53:35,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-21 15:53:35,201 INFO L87 Difference]: Start difference. First operand 234 states and 280 transitions. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 15:53:35,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 15:53:35,326 INFO L93 Difference]: Finished difference Result 428 states and 522 transitions. [2022-07-21 15:53:35,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 15:53:35,327 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 120 [2022-07-21 15:53:35,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 15:53:35,328 INFO L225 Difference]: With dead ends: 428 [2022-07-21 15:53:35,328 INFO L226 Difference]: Without dead ends: 243 [2022-07-21 15:53:35,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-07-21 15:53:35,330 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 12 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 15:53:35,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1036 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 15:53:35,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-07-21 15:53:35,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2022-07-21 15:53:35,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 229 states have (on average 1.2008733624454149) internal successors, (275), 236 states have internal predecessors, (275), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-21 15:53:35,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 292 transitions. [2022-07-21 15:53:35,340 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 292 transitions. Word has length 120 [2022-07-21 15:53:35,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 15:53:35,340 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 292 transitions. [2022-07-21 15:53:35,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 15:53:35,341 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 292 transitions. [2022-07-21 15:53:35,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-21 15:53:35,342 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 15:53:35,342 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 15:53:35,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 15:53:35,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-21 15:53:35,568 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 15:53:35,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 15:53:35,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1544509267, now seen corresponding path program 2 times [2022-07-21 15:53:35,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 15:53:35,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289066288] [2022-07-21 15:53:35,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:53:35,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 15:53:35,618 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 15:53:35,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983836141] [2022-07-21 15:53:35,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 15:53:35,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:53:35,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 15:53:35,620 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) [2022-07-21 15:53:35,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 15:53:36,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 15:53:36,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 15:53:36,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 15:53:36,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 15:53:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 15:53:36,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 15:53:36,936 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 15:53:36,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 15:53:36,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289066288] [2022-07-21 15:53:36,936 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 15:53:36,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983836141] [2022-07-21 15:53:36,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983836141] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 15:53:36,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 15:53:36,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2022-07-21 15:53:36,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026953238] [2022-07-21 15:53:36,937 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 15:53:36,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 15:53:36,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 15:53:36,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 15:53:36,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-07-21 15:53:36,938 INFO L87 Difference]: Start difference. First operand 243 states and 292 transitions. Second operand has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 15:53:37,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 15:53:37,525 INFO L93 Difference]: Finished difference Result 446 states and 547 transitions. [2022-07-21 15:53:37,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 15:53:37,525 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 124 [2022-07-21 15:53:37,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 15:53:37,527 INFO L225 Difference]: With dead ends: 446 [2022-07-21 15:53:37,527 INFO L226 Difference]: Without dead ends: 258 [2022-07-21 15:53:37,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=244, Invalid=512, Unknown=0, NotChecked=0, Total=756 [2022-07-21 15:53:37,528 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 52 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1464 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 15:53:37,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1464 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 15:53:37,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-07-21 15:53:37,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 252. [2022-07-21 15:53:37,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 238 states have (on average 1.2058823529411764) internal successors, (287), 245 states have internal predecessors, (287), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-21 15:53:37,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 304 transitions. [2022-07-21 15:53:37,537 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 304 transitions. Word has length 124 [2022-07-21 15:53:37,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 15:53:37,538 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 304 transitions. [2022-07-21 15:53:37,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 15:53:37,538 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 304 transitions. [2022-07-21 15:53:37,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-21 15:53:37,539 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 15:53:37,539 INFO L195 NwaCegarLoop]: trace histogram [15, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 15:53:37,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 15:53:37,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:53:37,756 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 15:53:37,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 15:53:37,756 INFO L85 PathProgramCache]: Analyzing trace with hash 453394239, now seen corresponding path program 3 times [2022-07-21 15:53:37,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 15:53:37,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675406771] [2022-07-21 15:53:37,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:53:37,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 15:53:37,802 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 15:53:37,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225871180] [2022-07-21 15:53:37,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 15:53:37,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:53:37,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 15:53:37,804 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) [2022-07-21 15:53:37,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process