./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_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 69d24e9affd7540aafb8052ecd737d7732ca2a63c7e8e16adc4217413d1d99a5 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 18:48:17,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 18:48:17,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 18:48:17,502 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 18:48:17,502 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 18:48:17,503 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 18:48:17,504 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 18:48:17,505 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 18:48:17,507 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 18:48:17,507 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 18:48:17,508 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 18:48:17,509 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 18:48:17,509 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 18:48:17,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 18:48:17,510 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 18:48:17,511 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 18:48:17,512 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 18:48:17,513 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 18:48:17,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 18:48:17,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 18:48:17,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 18:48:17,517 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 18:48:17,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 18:48:17,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 18:48:17,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 18:48:17,520 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 18:48:17,520 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 18:48:17,521 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 18:48:17,521 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 18:48:17,522 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 18:48:17,522 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 18:48:17,523 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 18:48:17,523 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 18:48:17,524 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 18:48:17,524 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 18:48:17,525 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 18:48:17,525 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 18:48:17,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 18:48:17,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 18:48:17,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 18:48:17,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 18:48:17,528 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-18 18:48:17,541 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 18:48:17,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 18:48:17,542 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 18:48:17,542 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 18:48:17,543 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 18:48:17,543 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 18:48:17,543 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 18:48:17,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 18:48:17,544 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 18:48:17,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 18:48:17,544 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 18:48:17,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 18:48:17,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 18:48:17,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 18:48:17,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-18 18:48:17,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 18:48:17,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-18 18:48:17,545 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 18:48:17,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-18 18:48:17,545 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 18:48:17,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-18 18:48:17,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 18:48:17,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 18:48:17,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 18:48:17,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 18:48:17,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 18:48:17,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 18:48:17,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-18 18:48:17,547 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 18:48:17,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 18:48:17,547 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-18 18:48:17,548 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-18 18:48:17,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-18 18:48:17,548 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 18:48:17,548 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69d24e9affd7540aafb8052ecd737d7732ca2a63c7e8e16adc4217413d1d99a5 [2021-12-18 18:48:17,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 18:48:17,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 18:48:17,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 18:48:17,772 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 18:48:17,774 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 18:48:17,775 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i [2021-12-18 18:48:17,822 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fd1ae9e6/05ad71b7cc554bf684f4a4334994ac85/FLAG396983f94 [2021-12-18 18:48:18,326 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 18:48:18,327 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i [2021-12-18 18:48:18,344 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fd1ae9e6/05ad71b7cc554bf684f4a4334994ac85/FLAG396983f94 [2021-12-18 18:48:18,618 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fd1ae9e6/05ad71b7cc554bf684f4a4334994ac85 [2021-12-18 18:48:18,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 18:48:18,622 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 18:48:18,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 18:48:18,626 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 18:48:18,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 18:48:18,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 06:48:18" (1/1) ... [2021-12-18 18:48:18,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7394f7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:48:18, skipping insertion in model container [2021-12-18 18:48:18,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 06:48:18" (1/1) ... [2021-12-18 18:48:18,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 18:48:18,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 18:48:18,905 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i[37019,37032] [2021-12-18 18:48:18,964 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i[47352,47365] [2021-12-18 18:48:18,969 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 18:48:18,975 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 18:48:18,993 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i[37019,37032] [2021-12-18 18:48:19,025 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i[47352,47365] [2021-12-18 18:48:19,027 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 18:48:19,054 INFO L208 MainTranslator]: Completed translation [2021-12-18 18:48:19,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:48:19 WrapperNode [2021-12-18 18:48:19,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 18:48:19,055 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 18:48:19,056 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 18:48:19,056 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 18:48:19,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:48:19" (1/1) ... [2021-12-18 18:48:19,090 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:48:19" (1/1) ... [2021-12-18 18:48:19,145 INFO L137 Inliner]: procedures = 208, calls = 235, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 884 [2021-12-18 18:48:19,148 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 18:48:19,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 18:48:19,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 18:48:19,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 18:48:19,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:48:19" (1/1) ... [2021-12-18 18:48:19,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:48:19" (1/1) ... [2021-12-18 18:48:19,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:48:19" (1/1) ... [2021-12-18 18:48:19,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:48:19" (1/1) ... [2021-12-18 18:48:19,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:48:19" (1/1) ... [2021-12-18 18:48:19,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:48:19" (1/1) ... [2021-12-18 18:48:19,226 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:48:19" (1/1) ... [2021-12-18 18:48:19,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 18:48:19,239 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 18:48:19,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 18:48:19,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 18:48:19,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:48:19" (1/1) ... [2021-12-18 18:48:19,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 18:48:19,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:48:19,266 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-18 18:48:19,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-18 18:48:19,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-18 18:48:19,309 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-18 18:48:19,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 18:48:19,309 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-18 18:48:19,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 18:48:19,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 18:48:19,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 18:48:19,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-18 18:48:19,310 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-18 18:48:19,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 18:48:19,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 18:48:19,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 18:48:19,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 18:48:19,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-18 18:48:19,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 18:48:19,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 18:48:19,511 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 18:48:19,513 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 18:48:20,032 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 18:48:20,038 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 18:48:20,038 INFO L301 CfgBuilder]: Removed 54 assume(true) statements. [2021-12-18 18:48:20,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 06:48:20 BoogieIcfgContainer [2021-12-18 18:48:20,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 18:48:20,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 18:48:20,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 18:48:20,043 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 18:48:20,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 06:48:18" (1/3) ... [2021-12-18 18:48:20,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3827930d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 06:48:20, skipping insertion in model container [2021-12-18 18:48:20,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:48:19" (2/3) ... [2021-12-18 18:48:20,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3827930d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 06:48:20, skipping insertion in model container [2021-12-18 18:48:20,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 06:48:20" (3/3) ... [2021-12-18 18:48:20,046 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test2-1.i [2021-12-18 18:48:20,049 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 18:48:20,049 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-18 18:48:20,080 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 18:48:20,084 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-18 18:48:20,095 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-18 18:48:20,113 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) [2021-12-18 18:48:20,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 18:48:20,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:48:20,117 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:48:20,118 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:48:20,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:48:20,125 INFO L85 PathProgramCache]: Analyzing trace with hash -858859523, now seen corresponding path program 1 times [2021-12-18 18:48:20,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:48:20,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158101433] [2021-12-18 18:48:20,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:48:20,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:48:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:48:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 18:48:20,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:48:20,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158101433] [2021-12-18 18:48:20,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158101433] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:48:20,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:48:20,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 18:48:20,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355375065] [2021-12-18 18:48:20,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:48:20,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-18 18:48:20,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:48:20,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-18 18:48:20,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-18 18:48:20,359 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) [2021-12-18 18:48:20,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:48:20,405 INFO L93 Difference]: Finished difference Result 352 states and 589 transitions. [2021-12-18 18:48:20,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-18 18:48:20,407 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 [2021-12-18 18:48:20,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:48:20,418 INFO L225 Difference]: With dead ends: 352 [2021-12-18 18:48:20,419 INFO L226 Difference]: Without dead ends: 173 [2021-12-18 18:48:20,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-18 18:48:20,425 INFO L933 BasicCegarLoop]: 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 [2021-12-18 18:48:20,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 18:48:20,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-18 18:48:20,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-12-18 18:48:20,461 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) [2021-12-18 18:48:20,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 229 transitions. [2021-12-18 18:48:20,463 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 229 transitions. Word has length 9 [2021-12-18 18:48:20,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:48:20,463 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 229 transitions. [2021-12-18 18:48:20,463 INFO L471 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) [2021-12-18 18:48:20,464 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 229 transitions. [2021-12-18 18:48:20,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-18 18:48:20,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:48:20,465 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:48:20,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 18:48:20,466 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:48:20,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:48:20,466 INFO L85 PathProgramCache]: Analyzing trace with hash -294026559, now seen corresponding path program 1 times [2021-12-18 18:48:20,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:48:20,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978783063] [2021-12-18 18:48:20,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:48:20,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:48:20,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:48:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 18:48:20,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:48:20,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978783063] [2021-12-18 18:48:20,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978783063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:48:20,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:48:20,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 18:48:20,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122938178] [2021-12-18 18:48:20,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:48:20,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 18:48:20,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:48:20,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 18:48:20,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 18:48:20,565 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) [2021-12-18 18:48:20,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:48:20,897 INFO L93 Difference]: Finished difference Result 363 states and 489 transitions. [2021-12-18 18:48:20,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 18:48:20,898 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 [2021-12-18 18:48:20,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:48:20,900 INFO L225 Difference]: With dead ends: 363 [2021-12-18 18:48:20,900 INFO L226 Difference]: Without dead ends: 284 [2021-12-18 18:48:20,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 18:48:20,902 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 138 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 18:48:20,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 553 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 18:48:20,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-12-18 18:48:20,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 175. [2021-12-18 18:48:20,914 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) [2021-12-18 18:48:20,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 231 transitions. [2021-12-18 18:48:20,915 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 231 transitions. Word has length 44 [2021-12-18 18:48:20,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:48:20,915 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 231 transitions. [2021-12-18 18:48:20,915 INFO L471 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) [2021-12-18 18:48:20,915 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 231 transitions. [2021-12-18 18:48:20,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-18 18:48:20,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:48:20,918 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:48:20,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 18:48:20,918 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:48:20,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:48:20,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1509402797, now seen corresponding path program 1 times [2021-12-18 18:48:20,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:48:20,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298005203] [2021-12-18 18:48:20,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:48:20,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:48:21,036 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:48:21,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1880433498] [2021-12-18 18:48:21,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:48:21,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:48:21,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:48:21,051 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 18:48:21,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 18:48:21,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:48:21,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 1638 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 18:48:21,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:48:21,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 18:48:21,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:48:21,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:48:21,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298005203] [2021-12-18 18:48:21,768 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:48:21,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880433498] [2021-12-18 18:48:21,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880433498] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:48:21,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:48:21,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 18:48:21,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870530289] [2021-12-18 18:48:21,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:48:21,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 18:48:21,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:48:21,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 18:48:21,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 18:48:21,770 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) [2021-12-18 18:48:21,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:48:21,828 INFO L93 Difference]: Finished difference Result 367 states and 489 transitions. [2021-12-18 18:48:21,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 18:48:21,829 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 [2021-12-18 18:48:21,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:48:21,831 INFO L225 Difference]: With dead ends: 367 [2021-12-18 18:48:21,831 INFO L226 Difference]: Without dead ends: 196 [2021-12-18 18:48:21,834 INFO L932 BasicCegarLoop]: 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 [2021-12-18 18:48:21,836 INFO L933 BasicCegarLoop]: 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 [2021-12-18 18:48:21,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 403 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 18:48:21,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-18 18:48:21,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2021-12-18 18:48:21,861 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) [2021-12-18 18:48:21,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 251 transitions. [2021-12-18 18:48:21,862 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 251 transitions. Word has length 96 [2021-12-18 18:48:21,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:48:21,862 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 251 transitions. [2021-12-18 18:48:21,862 INFO L471 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) [2021-12-18 18:48:21,863 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 251 transitions. [2021-12-18 18:48:21,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-18 18:48:21,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:48:21,865 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:48:21,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-18 18:48:22,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:48:22,087 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:48:22,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:48:22,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1482337195, now seen corresponding path program 1 times [2021-12-18 18:48:22,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:48:22,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325417667] [2021-12-18 18:48:22,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:48:22,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:48:22,166 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:48:22,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740007254] [2021-12-18 18:48:22,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:48:22,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:48:22,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:48:22,168 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 18:48:22,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 18:48:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:48:22,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 1640 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 18:48:22,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:48:22,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 18:48:22,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:48:22,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:48:22,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325417667] [2021-12-18 18:48:22,736 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:48:22,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740007254] [2021-12-18 18:48:22,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740007254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:48:22,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:48:22,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 18:48:22,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984062383] [2021-12-18 18:48:22,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:48:22,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 18:48:22,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:48:22,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 18:48:22,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 18:48:22,738 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) [2021-12-18 18:48:22,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:48:22,800 INFO L93 Difference]: Finished difference Result 294 states and 388 transitions. [2021-12-18 18:48:22,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 18:48:22,801 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 [2021-12-18 18:48:22,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:48:22,802 INFO L225 Difference]: With dead ends: 294 [2021-12-18 18:48:22,802 INFO L226 Difference]: Without dead ends: 216 [2021-12-18 18:48:22,802 INFO L932 BasicCegarLoop]: 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 [2021-12-18 18:48:22,803 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 8 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 18:48:22,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 405 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 18:48:22,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-18 18:48:22,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2021-12-18 18:48:22,808 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) [2021-12-18 18:48:22,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 271 transitions. [2021-12-18 18:48:22,809 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 271 transitions. Word has length 96 [2021-12-18 18:48:22,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:48:22,809 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 271 transitions. [2021-12-18 18:48:22,809 INFO L471 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) [2021-12-18 18:48:22,810 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 271 transitions. [2021-12-18 18:48:22,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-18 18:48:22,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:48:22,811 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:48:22,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 18:48:23,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-18 18:48:23,028 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:48:23,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:48:23,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1801512851, now seen corresponding path program 1 times [2021-12-18 18:48:23,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:48:23,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635836188] [2021-12-18 18:48:23,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:48:23,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:48:23,105 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:48:23,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [187938128] [2021-12-18 18:48:23,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:48:23,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:48:23,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:48:23,109 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 18:48:23,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 18:48:23,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:48:23,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 18:48:23,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:48:23,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 18:48:23,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:48:23,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:48:23,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635836188] [2021-12-18 18:48:23,762 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:48:23,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187938128] [2021-12-18 18:48:23,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187938128] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:48:23,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:48:23,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 18:48:23,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400236257] [2021-12-18 18:48:23,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:48:23,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 18:48:23,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:48:23,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 18:48:23,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 18:48:23,765 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) [2021-12-18 18:48:23,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:48:23,817 INFO L93 Difference]: Finished difference Result 418 states and 530 transitions. [2021-12-18 18:48:23,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 18:48:23,818 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 [2021-12-18 18:48:23,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:48:23,819 INFO L225 Difference]: With dead ends: 418 [2021-12-18 18:48:23,819 INFO L226 Difference]: Without dead ends: 207 [2021-12-18 18:48:23,819 INFO L932 BasicCegarLoop]: 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 [2021-12-18 18:48:23,820 INFO L933 BasicCegarLoop]: 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, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 18:48:23,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 431 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 18:48:23,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-12-18 18:48:23,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 201. [2021-12-18 18:48:23,824 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) [2021-12-18 18:48:23,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 250 transitions. [2021-12-18 18:48:23,825 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 250 transitions. Word has length 96 [2021-12-18 18:48:23,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:48:23,825 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 250 transitions. [2021-12-18 18:48:23,825 INFO L471 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) [2021-12-18 18:48:23,825 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 250 transitions. [2021-12-18 18:48:23,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-18 18:48:23,826 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:48:23,826 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:48:23,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-18 18:48:24,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:48:24,048 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:48:24,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:48:24,048 INFO L85 PathProgramCache]: Analyzing trace with hash 432355323, now seen corresponding path program 1 times [2021-12-18 18:48:24,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:48:24,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158522872] [2021-12-18 18:48:24,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:48:24,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:48:24,124 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:48:24,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1911770775] [2021-12-18 18:48:24,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:48:24,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:48:24,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:48:24,126 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 18:48:24,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 18:48:24,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:48:24,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 1628 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 18:48:24,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:48:24,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 18:48:24,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:48:24,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:48:24,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158522872] [2021-12-18 18:48:24,926 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:48:24,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911770775] [2021-12-18 18:48:24,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911770775] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:48:24,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:48:24,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 18:48:24,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411067855] [2021-12-18 18:48:24,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:48:24,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 18:48:24,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:48:24,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 18:48:24,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 18:48:24,929 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) [2021-12-18 18:48:24,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:48:24,992 INFO L93 Difference]: Finished difference Result 291 states and 368 transitions. [2021-12-18 18:48:24,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 18:48:24,993 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 [2021-12-18 18:48:24,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:48:24,994 INFO L225 Difference]: With dead ends: 291 [2021-12-18 18:48:24,994 INFO L226 Difference]: Without dead ends: 193 [2021-12-18 18:48:24,994 INFO L932 BasicCegarLoop]: 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 [2021-12-18 18:48:24,995 INFO L933 BasicCegarLoop]: 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, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 18:48:24,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 518 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 18:48:24,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-12-18 18:48:24,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 187. [2021-12-18 18:48:25,002 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) [2021-12-18 18:48:25,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 229 transitions. [2021-12-18 18:48:25,003 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 229 transitions. Word has length 96 [2021-12-18 18:48:25,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:48:25,003 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 229 transitions. [2021-12-18 18:48:25,004 INFO L471 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) [2021-12-18 18:48:25,004 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 229 transitions. [2021-12-18 18:48:25,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-18 18:48:25,004 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:48:25,005 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:48:25,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-18 18:48:25,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:48:25,219 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:48:25,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:48:25,220 INFO L85 PathProgramCache]: Analyzing trace with hash -725253137, now seen corresponding path program 1 times [2021-12-18 18:48:25,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:48:25,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666632581] [2021-12-18 18:48:25,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:48:25,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:48:25,282 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:48:25,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564717594] [2021-12-18 18:48:25,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:48:25,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:48:25,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:48:25,284 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 18:48:25,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 18:48:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:48:25,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 1616 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 18:48:25,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:48:26,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 18:48:26,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:48:26,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:48:26,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666632581] [2021-12-18 18:48:26,184 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:48:26,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564717594] [2021-12-18 18:48:26,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564717594] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:48:26,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:48:26,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 18:48:26,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695082585] [2021-12-18 18:48:26,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:48:26,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 18:48:26,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:48:26,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 18:48:26,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 18:48:26,186 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) [2021-12-18 18:48:26,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:48:26,237 INFO L93 Difference]: Finished difference Result 476 states and 582 transitions. [2021-12-18 18:48:26,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 18:48:26,237 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 [2021-12-18 18:48:26,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:48:26,238 INFO L225 Difference]: With dead ends: 476 [2021-12-18 18:48:26,239 INFO L226 Difference]: Without dead ends: 293 [2021-12-18 18:48:26,239 INFO L932 BasicCegarLoop]: 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 [2021-12-18 18:48:26,240 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 75 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 18:48:26,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 456 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 18:48:26,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-12-18 18:48:26,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 291. [2021-12-18 18:48:26,246 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) [2021-12-18 18:48:26,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 354 transitions. [2021-12-18 18:48:26,247 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 354 transitions. Word has length 96 [2021-12-18 18:48:26,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:48:26,248 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 354 transitions. [2021-12-18 18:48:26,248 INFO L471 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) [2021-12-18 18:48:26,248 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 354 transitions. [2021-12-18 18:48:26,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-18 18:48:26,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:48:26,249 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:48:26,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-18 18:48:26,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:48:26,472 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:48:26,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:48:26,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1015837155, now seen corresponding path program 1 times [2021-12-18 18:48:26,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:48:26,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635761896] [2021-12-18 18:48:26,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:48:26,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:48:26,502 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:48:26,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702320733] [2021-12-18 18:48:26,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:48:26,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:48:26,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:48:26,504 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 18:48:26,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 18:48:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:48:27,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 18:48:27,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:48:27,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 18:48:27,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:48:27,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:48:27,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635761896] [2021-12-18 18:48:27,172 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:48:27,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702320733] [2021-12-18 18:48:27,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702320733] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:48:27,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:48:27,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 18:48:27,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739367576] [2021-12-18 18:48:27,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:48:27,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 18:48:27,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:48:27,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 18:48:27,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 18:48:27,175 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) [2021-12-18 18:48:27,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:48:27,477 INFO L93 Difference]: Finished difference Result 474 states and 579 transitions. [2021-12-18 18:48:27,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 18:48:27,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2021-12-18 18:48:27,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:48:27,479 INFO L225 Difference]: With dead ends: 474 [2021-12-18 18:48:27,479 INFO L226 Difference]: Without dead ends: 231 [2021-12-18 18:48:27,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 18:48:27,480 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 274 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 18:48:27,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 302 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 18:48:27,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-12-18 18:48:27,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2021-12-18 18:48:27,490 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) [2021-12-18 18:48:27,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 276 transitions. [2021-12-18 18:48:27,491 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 276 transitions. Word has length 111 [2021-12-18 18:48:27,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:48:27,492 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 276 transitions. [2021-12-18 18:48:27,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 18:48:27,492 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 276 transitions. [2021-12-18 18:48:27,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-18 18:48:27,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:48:27,495 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:48:27,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 18:48:27,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:48:27,715 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:48:27,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:48:27,716 INFO L85 PathProgramCache]: Analyzing trace with hash 379973459, now seen corresponding path program 1 times [2021-12-18 18:48:27,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:48:27,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584964104] [2021-12-18 18:48:27,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:48:27,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:48:27,750 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:48:27,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204514135] [2021-12-18 18:48:27,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:48:27,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:48:27,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:48:27,751 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 18:48:27,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 18:48:28,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:48:28,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 18:48:28,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:48:28,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 18:48:28,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:48:28,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:48:28,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584964104] [2021-12-18 18:48:28,772 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:48:28,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204514135] [2021-12-18 18:48:28,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204514135] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:48:28,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:48:28,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 18:48:28,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130108499] [2021-12-18 18:48:28,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:48:28,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 18:48:28,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:48:28,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 18:48:28,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 18:48:28,774 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 18:48:28,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:48:28,804 INFO L93 Difference]: Finished difference Result 414 states and 501 transitions. [2021-12-18 18:48:28,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 18:48:28,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 118 [2021-12-18 18:48:28,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:48:28,808 INFO L225 Difference]: With dead ends: 414 [2021-12-18 18:48:28,808 INFO L226 Difference]: Without dead ends: 234 [2021-12-18 18:48:28,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 18:48:28,810 INFO L933 BasicCegarLoop]: 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 [2021-12-18 18:48:28,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 629 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 18:48:28,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-18 18:48:28,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2021-12-18 18:48:28,821 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) [2021-12-18 18:48:28,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 280 transitions. [2021-12-18 18:48:28,824 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 280 transitions. Word has length 118 [2021-12-18 18:48:28,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:48:28,825 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 280 transitions. [2021-12-18 18:48:28,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 18:48:28,825 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 280 transitions. [2021-12-18 18:48:28,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-18 18:48:28,826 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:48:28,826 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:48:28,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-18 18:48:29,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:48:29,043 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:48:29,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:48:29,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1827414795, now seen corresponding path program 1 times [2021-12-18 18:48:29,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:48:29,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907494458] [2021-12-18 18:48:29,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:48:29,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:48:29,086 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:48:29,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [27376512] [2021-12-18 18:48:29,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:48:29,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:48:29,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:48:29,088 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 18:48:29,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 18:48:30,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:48:30,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 18:48:30,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:48:30,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 18:48:30,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 18:48:30,580 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 18:48:30,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:48:30,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907494458] [2021-12-18 18:48:30,580 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:48:30,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27376512] [2021-12-18 18:48:30,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27376512] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 18:48:30,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 18:48:30,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-18 18:48:30,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065225247] [2021-12-18 18:48:30,581 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 18:48:30,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 18:48:30,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:48:30,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 18:48:30,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-18 18:48:30,582 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) [2021-12-18 18:48:30,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:48:30,675 INFO L93 Difference]: Finished difference Result 428 states and 522 transitions. [2021-12-18 18:48:30,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 18:48:30,676 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 120 [2021-12-18 18:48:30,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:48:30,677 INFO L225 Difference]: With dead ends: 428 [2021-12-18 18:48:30,677 INFO L226 Difference]: Without dead ends: 245 [2021-12-18 18:48:30,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-12-18 18:48:30,678 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 11 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 18:48:30,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1045 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 18:48:30,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-18 18:48:30,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 243. [2021-12-18 18:48:30,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 229 states have (on average 1.2096069868995634) internal successors, (277), 236 states have internal predecessors, (277), 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) [2021-12-18 18:48:30,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 294 transitions. [2021-12-18 18:48:30,684 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 294 transitions. Word has length 120 [2021-12-18 18:48:30,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:48:30,685 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 294 transitions. [2021-12-18 18:48:30,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 18:48:30,685 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 294 transitions. [2021-12-18 18:48:30,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-18 18:48:30,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:48:30,686 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:48:30,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-18 18:48:30,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-18 18:48:30,907 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:48:30,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:48:30,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1544509267, now seen corresponding path program 2 times [2021-12-18 18:48:30,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:48:30,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800195910] [2021-12-18 18:48:30,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:48:30,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:48:30,944 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:48:30,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1378854152] [2021-12-18 18:48:30,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 18:48:30,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:48:30,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:48:30,946 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 18:48:30,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 18:48:31,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 18:48:31,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 18:48:31,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 18:48:31,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:48:31,921 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 18:48:31,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 18:48:32,170 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-18 18:48:32,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:48:32,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800195910] [2021-12-18 18:48:32,171 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:48:32,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378854152] [2021-12-18 18:48:32,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378854152] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 18:48:32,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 18:48:32,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-12-18 18:48:32,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520273177] [2021-12-18 18:48:32,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 18:48:32,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 18:48:32,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:48:32,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 18:48:32,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-12-18 18:48:32,173 INFO L87 Difference]: Start difference. First operand 243 states and 294 transitions. Second operand has 13 states, 13 states have (on average 9.76923076923077) internal successors, (127), 13 states have internal predecessors, (127), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 18:48:32,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:48:32,442 INFO L93 Difference]: Finished difference Result 443 states and 545 transitions. [2021-12-18 18:48:32,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 18:48:32,443 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 9.76923076923077) internal successors, (127), 13 states have internal predecessors, (127), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 124 [2021-12-18 18:48:32,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:48:32,444 INFO L225 Difference]: With dead ends: 443 [2021-12-18 18:48:32,444 INFO L226 Difference]: Without dead ends: 262 [2021-12-18 18:48:32,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-12-18 18:48:32,445 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 56 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 18:48:32,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 1051 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 18:48:32,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-12-18 18:48:32,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 249. [2021-12-18 18:48:32,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 235 states have (on average 1.2297872340425533) internal successors, (289), 242 states have internal predecessors, (289), 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) [2021-12-18 18:48:32,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 306 transitions. [2021-12-18 18:48:32,453 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 306 transitions. Word has length 124 [2021-12-18 18:48:32,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:48:32,453 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 306 transitions. [2021-12-18 18:48:32,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.76923076923077) internal successors, (127), 13 states have internal predecessors, (127), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 18:48:32,453 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 306 transitions. [2021-12-18 18:48:32,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-18 18:48:32,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:48:32,455 INFO L514 BasicCegarLoop]: trace histogram [12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:48:32,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-18 18:48:32,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:48:32,675 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:48:32,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:48:32,676 INFO L85 PathProgramCache]: Analyzing trace with hash -515004461, now seen corresponding path program 3 times [2021-12-18 18:48:32,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:48:32,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091621783] [2021-12-18 18:48:32,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:48:32,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:48:32,712 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:48:32,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1213070654] [2021-12-18 18:48:32,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 18:48:32,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:48:32,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:48:32,713 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 18:48:32,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process Killed by 15