./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_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_FNV_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 c2bc72e0ba847f7c079e01dc4ce9f95afa555e9d2ef7b4bcdf5e1274db86053e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 05:31:09,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 05:31:09,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 05:31:09,228 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 05:31:09,229 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 05:31:09,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 05:31:09,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 05:31:09,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 05:31:09,242 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 05:31:09,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 05:31:09,246 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 05:31:09,247 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 05:31:09,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 05:31:09,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 05:31:09,255 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 05:31:09,256 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 05:31:09,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 05:31:09,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 05:31:09,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 05:31:09,266 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 05:31:09,270 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 05:31:09,271 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 05:31:09,272 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 05:31:09,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 05:31:09,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 05:31:09,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 05:31:09,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 05:31:09,280 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 05:31:09,280 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 05:31:09,281 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 05:31:09,281 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 05:31:09,282 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 05:31:09,283 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 05:31:09,284 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 05:31:09,285 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 05:31:09,286 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 05:31:09,286 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 05:31:09,286 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 05:31:09,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 05:31:09,287 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 05:31:09,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 05:31:09,289 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 05:31:09,321 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 05:31:09,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 05:31:09,322 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 05:31:09,323 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 05:31:09,323 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 05:31:09,324 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 05:31:09,324 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 05:31:09,324 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 05:31:09,325 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 05:31:09,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 05:31:09,326 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 05:31:09,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 05:31:09,326 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 05:31:09,326 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 05:31:09,326 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 05:31:09,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 05:31:09,327 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 05:31:09,327 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 05:31:09,327 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 05:31:09,327 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 05:31:09,328 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 05:31:09,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 05:31:09,328 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 05:31:09,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 05:31:09,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:31:09,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 05:31:09,329 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 05:31:09,329 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 05:31:09,329 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 05:31:09,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 05:31:09,329 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 05:31:09,330 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 05:31:09,330 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 05:31:09,330 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 05:31:09,330 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2bc72e0ba847f7c079e01dc4ce9f95afa555e9d2ef7b4bcdf5e1274db86053e [2021-12-16 05:31:09,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 05:31:09,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 05:31:09,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 05:31:09,627 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 05:31:09,627 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 05:31:09,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test2-1.i [2021-12-16 05:31:09,689 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb472b387/b928911f666e42368ba30d9aea96913b/FLAG423b53f0a [2021-12-16 05:31:10,224 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 05:31:10,225 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test2-1.i [2021-12-16 05:31:10,240 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb472b387/b928911f666e42368ba30d9aea96913b/FLAG423b53f0a [2021-12-16 05:31:10,506 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb472b387/b928911f666e42368ba30d9aea96913b [2021-12-16 05:31:10,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 05:31:10,511 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 05:31:10,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 05:31:10,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 05:31:10,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 05:31:10,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:31:10" (1/1) ... [2021-12-16 05:31:10,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16f268a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:31:10, skipping insertion in model container [2021-12-16 05:31:10,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:31:10" (1/1) ... [2021-12-16 05:31:10,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 05:31:10,588 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 05:31:11,008 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_FNV_test2-1.i[37019,37032] [2021-12-16 05:31:11,122 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_FNV_test2-1.i[47352,47365] [2021-12-16 05:31:11,132 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:31:11,141 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 05:31:11,175 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_FNV_test2-1.i[37019,37032] [2021-12-16 05:31:11,252 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_FNV_test2-1.i[47352,47365] [2021-12-16 05:31:11,254 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:31:11,296 INFO L208 MainTranslator]: Completed translation [2021-12-16 05:31:11,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:31:11 WrapperNode [2021-12-16 05:31:11,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 05:31:11,298 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 05:31:11,299 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 05:31:11,299 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 05:31:11,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:31:11" (1/1) ... [2021-12-16 05:31:11,346 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:31:11" (1/1) ... [2021-12-16 05:31:11,396 INFO L137 Inliner]: procedures = 208, calls = 235, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 884 [2021-12-16 05:31:11,397 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 05:31:11,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 05:31:11,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 05:31:11,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 05:31:11,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:31:11" (1/1) ... [2021-12-16 05:31:11,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:31:11" (1/1) ... [2021-12-16 05:31:11,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:31:11" (1/1) ... [2021-12-16 05:31:11,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:31:11" (1/1) ... [2021-12-16 05:31:11,488 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:31:11" (1/1) ... [2021-12-16 05:31:11,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:31:11" (1/1) ... [2021-12-16 05:31:11,510 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:31:11" (1/1) ... [2021-12-16 05:31:11,537 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 05:31:11,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 05:31:11,538 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 05:31:11,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 05:31:11,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:31:11" (1/1) ... [2021-12-16 05:31:11,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:31:11,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:31:11,577 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) [2021-12-16 05:31:11,606 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 [2021-12-16 05:31:11,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-16 05:31:11,621 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-16 05:31:11,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 05:31:11,623 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-16 05:31:11,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 05:31:11,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 05:31:11,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 05:31:11,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-16 05:31:11,624 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-16 05:31:11,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 05:31:11,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 05:31:11,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 05:31:11,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 05:31:11,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 05:31:11,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 05:31:11,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 05:31:11,814 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 05:31:11,815 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 05:31:12,586 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 05:31:12,597 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 05:31:12,597 INFO L301 CfgBuilder]: Removed 54 assume(true) statements. [2021-12-16 05:31:12,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:31:12 BoogieIcfgContainer [2021-12-16 05:31:12,599 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 05:31:12,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 05:31:12,601 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 05:31:12,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 05:31:12,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 05:31:10" (1/3) ... [2021-12-16 05:31:12,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c14321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:31:12, skipping insertion in model container [2021-12-16 05:31:12,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:31:11" (2/3) ... [2021-12-16 05:31:12,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c14321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:31:12, skipping insertion in model container [2021-12-16 05:31:12,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:31:12" (3/3) ... [2021-12-16 05:31:12,609 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test2-1.i [2021-12-16 05:31:12,618 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 05:31:12,619 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-16 05:31:12,662 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 05:31:12,669 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 [2021-12-16 05:31:12,669 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-16 05:31:12,686 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) [2021-12-16 05:31:12,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-16 05:31:12,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:31:12,691 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:31:12,692 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 05:31:12,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:31:12,700 INFO L85 PathProgramCache]: Analyzing trace with hash -858859523, now seen corresponding path program 1 times [2021-12-16 05:31:12,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:31:12,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663709671] [2021-12-16 05:31:12,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:31:12,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:31:12,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:31:12,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:31:12,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:31:12,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663709671] [2021-12-16 05:31:12,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663709671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:31:12,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:31:12,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:31:12,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062876236] [2021-12-16 05:31:12,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:31:12,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 05:31:12,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:31:12,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 05:31:12,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 05:31:12,902 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) [2021-12-16 05:31:12,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:31:12,960 INFO L93 Difference]: Finished difference Result 352 states and 589 transitions. [2021-12-16 05:31:12,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 05:31:12,962 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 [2021-12-16 05:31:12,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:31:12,973 INFO L225 Difference]: With dead ends: 352 [2021-12-16 05:31:12,973 INFO L226 Difference]: Without dead ends: 173 [2021-12-16 05:31:12,978 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 [2021-12-16 05:31:12,983 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 [2021-12-16 05:31:12,984 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] [2021-12-16 05:31:13,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-16 05:31:13,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-12-16 05:31:13,039 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) [2021-12-16 05:31:13,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 229 transitions. [2021-12-16 05:31:13,042 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 229 transitions. Word has length 9 [2021-12-16 05:31:13,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:31:13,043 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 229 transitions. [2021-12-16 05:31:13,043 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) [2021-12-16 05:31:13,044 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 229 transitions. [2021-12-16 05:31:13,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-16 05:31:13,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:31:13,046 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] [2021-12-16 05:31:13,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 05:31:13,047 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 05:31:13,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:31:13,049 INFO L85 PathProgramCache]: Analyzing trace with hash -294026559, now seen corresponding path program 1 times [2021-12-16 05:31:13,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:31:13,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412219008] [2021-12-16 05:31:13,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:31:13,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:31:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:31:13,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:31:13,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:31:13,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412219008] [2021-12-16 05:31:13,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412219008] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:31:13,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:31:13,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:31:13,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620523289] [2021-12-16 05:31:13,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:31:13,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:31:13,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:31:13,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:31:13,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:31:13,187 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) [2021-12-16 05:31:13,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:31:13,569 INFO L93 Difference]: Finished difference Result 363 states and 489 transitions. [2021-12-16 05:31:13,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:31:13,570 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 [2021-12-16 05:31:13,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:31:13,572 INFO L225 Difference]: With dead ends: 363 [2021-12-16 05:31:13,572 INFO L226 Difference]: Without dead ends: 284 [2021-12-16 05:31:13,573 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 [2021-12-16 05:31:13,574 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 138 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2021-12-16 05:31:13,575 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] [2021-12-16 05:31:13,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-12-16 05:31:13,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 175. [2021-12-16 05:31:13,587 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) [2021-12-16 05:31:13,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 231 transitions. [2021-12-16 05:31:13,588 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 231 transitions. Word has length 44 [2021-12-16 05:31:13,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:31:13,589 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 231 transitions. [2021-12-16 05:31:13,589 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) [2021-12-16 05:31:13,589 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 231 transitions. [2021-12-16 05:31:13,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-16 05:31:13,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:31:13,592 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] [2021-12-16 05:31:13,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 05:31:13,592 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 05:31:13,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:31:13,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1509402797, now seen corresponding path program 1 times [2021-12-16 05:31:13,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:31:13,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543682505] [2021-12-16 05:31:13,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:31:13,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:31:13,726 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 05:31:13,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1014631021] [2021-12-16 05:31:13,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:31:13,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:31:13,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:31:13,729 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) [2021-12-16 05:31:13,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 05:31:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:31:14,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 1638 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 05:31:14,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:31:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:31:14,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:31:14,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:31:14,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543682505] [2021-12-16 05:31:14,470 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 05:31:14,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014631021] [2021-12-16 05:31:14,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014631021] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:31:14,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:31:14,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:31:14,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624850457] [2021-12-16 05:31:14,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:31:14,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:31:14,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:31:14,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:31:14,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:31:14,473 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) [2021-12-16 05:31:14,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:31:14,530 INFO L93 Difference]: Finished difference Result 367 states and 489 transitions. [2021-12-16 05:31:14,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:31:14,531 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 [2021-12-16 05:31:14,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:31:14,532 INFO L225 Difference]: With dead ends: 367 [2021-12-16 05:31:14,533 INFO L226 Difference]: Without dead ends: 196 [2021-12-16 05:31:14,534 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 [2021-12-16 05:31:14,535 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 [2021-12-16 05:31:14,535 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] [2021-12-16 05:31:14,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-16 05:31:14,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2021-12-16 05:31:14,543 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) [2021-12-16 05:31:14,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 251 transitions. [2021-12-16 05:31:14,544 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 251 transitions. Word has length 96 [2021-12-16 05:31:14,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:31:14,545 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 251 transitions. [2021-12-16 05:31:14,545 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) [2021-12-16 05:31:14,545 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 251 transitions. [2021-12-16 05:31:14,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-16 05:31:14,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:31:14,548 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] [2021-12-16 05:31:14,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 05:31:14,764 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 [2021-12-16 05:31:14,764 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 05:31:14,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:31:14,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1482337195, now seen corresponding path program 1 times [2021-12-16 05:31:14,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:31:14,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120887646] [2021-12-16 05:31:14,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:31:14,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:31:14,876 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 05:31:14,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1394060228] [2021-12-16 05:31:14,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:31:14,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:31:14,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:31:14,878 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) [2021-12-16 05:31:14,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 05:31:15,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:31:15,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 1640 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 05:31:15,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:31:15,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:31:15,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:31:15,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:31:15,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120887646] [2021-12-16 05:31:15,669 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 05:31:15,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394060228] [2021-12-16 05:31:15,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394060228] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:31:15,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:31:15,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:31:15,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876566118] [2021-12-16 05:31:15,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:31:15,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:31:15,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:31:15,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:31:15,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:31:15,671 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) [2021-12-16 05:31:15,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:31:15,765 INFO L93 Difference]: Finished difference Result 294 states and 388 transitions. [2021-12-16 05:31:15,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:31:15,765 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 [2021-12-16 05:31:15,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:31:15,767 INFO L225 Difference]: With dead ends: 294 [2021-12-16 05:31:15,767 INFO L226 Difference]: Without dead ends: 216 [2021-12-16 05:31:15,767 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 [2021-12-16 05:31:15,768 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 8 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2021-12-16 05:31:15,768 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] [2021-12-16 05:31:15,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-16 05:31:15,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2021-12-16 05:31:15,796 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) [2021-12-16 05:31:15,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 271 transitions. [2021-12-16 05:31:15,797 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 271 transitions. Word has length 96 [2021-12-16 05:31:15,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:31:15,797 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 271 transitions. [2021-12-16 05:31:15,797 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) [2021-12-16 05:31:15,797 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 271 transitions. [2021-12-16 05:31:15,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-16 05:31:15,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:31:15,799 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] [2021-12-16 05:31:15,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 05:31:15,999 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 [2021-12-16 05:31:16,000 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 05:31:16,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:31:16,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1801512851, now seen corresponding path program 1 times [2021-12-16 05:31:16,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:31:16,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041151088] [2021-12-16 05:31:16,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:31:16,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:31:16,105 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 05:31:16,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1417621567] [2021-12-16 05:31:16,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:31:16,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:31:16,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:31:16,112 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) [2021-12-16 05:31:16,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 05:31:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:31:16,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 05:31:16,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:31:16,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:31:16,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:31:16,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:31:16,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041151088] [2021-12-16 05:31:16,965 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 05:31:16,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417621567] [2021-12-16 05:31:16,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417621567] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:31:16,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:31:16,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:31:16,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583588562] [2021-12-16 05:31:16,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:31:16,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:31:16,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:31:16,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:31:16,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:31:16,968 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) [2021-12-16 05:31:17,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:31:17,035 INFO L93 Difference]: Finished difference Result 418 states and 530 transitions. [2021-12-16 05:31:17,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:31:17,036 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 [2021-12-16 05:31:17,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:31:17,037 INFO L225 Difference]: With dead ends: 418 [2021-12-16 05:31:17,037 INFO L226 Difference]: Without dead ends: 207 [2021-12-16 05:31:17,038 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 [2021-12-16 05:31:17,039 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, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:31:17,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 431 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:31:17,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-12-16 05:31:17,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 201. [2021-12-16 05:31:17,046 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) [2021-12-16 05:31:17,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 250 transitions. [2021-12-16 05:31:17,047 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 250 transitions. Word has length 96 [2021-12-16 05:31:17,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:31:17,047 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 250 transitions. [2021-12-16 05:31:17,048 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) [2021-12-16 05:31:17,048 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 250 transitions. [2021-12-16 05:31:17,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-16 05:31:17,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:31:17,049 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] [2021-12-16 05:31:17,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 05:31:17,263 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 [2021-12-16 05:31:17,264 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 05:31:17,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:31:17,264 INFO L85 PathProgramCache]: Analyzing trace with hash 432355323, now seen corresponding path program 1 times [2021-12-16 05:31:17,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:31:17,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096702217] [2021-12-16 05:31:17,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:31:17,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:31:17,347 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 05:31:17,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201145559] [2021-12-16 05:31:17,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:31:17,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:31:17,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:31:17,349 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) [2021-12-16 05:31:17,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 05:31:18,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:31:18,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 1628 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 05:31:18,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:31:18,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:31:18,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:31:18,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:31:18,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096702217] [2021-12-16 05:31:18,209 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 05:31:18,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201145559] [2021-12-16 05:31:18,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201145559] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:31:18,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:31:18,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:31:18,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939192256] [2021-12-16 05:31:18,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:31:18,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:31:18,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:31:18,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:31:18,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:31:18,211 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) [2021-12-16 05:31:18,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:31:18,279 INFO L93 Difference]: Finished difference Result 291 states and 368 transitions. [2021-12-16 05:31:18,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:31:18,279 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 [2021-12-16 05:31:18,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:31:18,281 INFO L225 Difference]: With dead ends: 291 [2021-12-16 05:31:18,281 INFO L226 Difference]: Without dead ends: 193 [2021-12-16 05:31:18,281 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 [2021-12-16 05:31:18,282 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, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:31:18,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 518 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:31:18,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-12-16 05:31:18,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 187. [2021-12-16 05:31:18,288 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) [2021-12-16 05:31:18,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 229 transitions. [2021-12-16 05:31:18,289 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 229 transitions. Word has length 96 [2021-12-16 05:31:18,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:31:18,290 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 229 transitions. [2021-12-16 05:31:18,290 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) [2021-12-16 05:31:18,290 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 229 transitions. [2021-12-16 05:31:18,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-16 05:31:18,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:31:18,291 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] [2021-12-16 05:31:18,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 05:31:18,507 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 [2021-12-16 05:31:18,508 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 05:31:18,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:31:18,508 INFO L85 PathProgramCache]: Analyzing trace with hash -725253137, now seen corresponding path program 1 times [2021-12-16 05:31:18,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:31:18,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607748214] [2021-12-16 05:31:18,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:31:18,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:31:18,595 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 05:31:18,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [698154279] [2021-12-16 05:31:18,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:31:18,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:31:18,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:31:18,597 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) [2021-12-16 05:31:18,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 05:31:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:31:19,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 1616 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 05:31:19,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:31:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:31:19,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:31:19,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:31:19,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607748214] [2021-12-16 05:31:19,522 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 05:31:19,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698154279] [2021-12-16 05:31:19,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698154279] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:31:19,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:31:19,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:31:19,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748651341] [2021-12-16 05:31:19,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:31:19,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:31:19,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:31:19,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:31:19,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:31:19,524 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) [2021-12-16 05:31:19,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:31:19,586 INFO L93 Difference]: Finished difference Result 476 states and 582 transitions. [2021-12-16 05:31:19,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:31:19,586 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 [2021-12-16 05:31:19,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:31:19,588 INFO L225 Difference]: With dead ends: 476 [2021-12-16 05:31:19,588 INFO L226 Difference]: Without dead ends: 293 [2021-12-16 05:31:19,588 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 [2021-12-16 05:31:19,589 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 [2021-12-16 05:31:19,589 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] [2021-12-16 05:31:19,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-12-16 05:31:19,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 291. [2021-12-16 05:31:19,602 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) [2021-12-16 05:31:19,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 354 transitions. [2021-12-16 05:31:19,605 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 354 transitions. Word has length 96 [2021-12-16 05:31:19,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:31:19,607 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 354 transitions. [2021-12-16 05:31:19,607 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) [2021-12-16 05:31:19,607 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 354 transitions. [2021-12-16 05:31:19,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-16 05:31:19,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:31:19,608 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] [2021-12-16 05:31:19,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 05:31:19,823 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 [2021-12-16 05:31:19,824 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 05:31:19,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:31:19,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1015837155, now seen corresponding path program 1 times [2021-12-16 05:31:19,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:31:19,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479548819] [2021-12-16 05:31:19,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:31:19,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:31:19,860 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 05:31:19,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141089859] [2021-12-16 05:31:19,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:31:19,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:31:19,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:31:19,863 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) [2021-12-16 05:31:19,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 05:31:20,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:31:20,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 05:31:20,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:31:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:31:20,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:31:20,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:31:20,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479548819] [2021-12-16 05:31:20,592 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 05:31:20,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141089859] [2021-12-16 05:31:20,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141089859] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:31:20,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:31:20,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:31:20,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130642199] [2021-12-16 05:31:20,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:31:20,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:31:20,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:31:20,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:31:20,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:31:20,595 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) [2021-12-16 05:31:20,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:31:20,866 INFO L93 Difference]: Finished difference Result 474 states and 579 transitions. [2021-12-16 05:31:20,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:31:20,867 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 [2021-12-16 05:31:20,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:31:20,869 INFO L225 Difference]: With dead ends: 474 [2021-12-16 05:31:20,869 INFO L226 Difference]: Without dead ends: 231 [2021-12-16 05:31:20,869 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 [2021-12-16 05:31:20,872 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 [2021-12-16 05:31:20,873 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] [2021-12-16 05:31:20,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-12-16 05:31:20,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2021-12-16 05:31:20,888 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) [2021-12-16 05:31:20,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 276 transitions. [2021-12-16 05:31:20,890 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 276 transitions. Word has length 111 [2021-12-16 05:31:20,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:31:20,890 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 276 transitions. [2021-12-16 05:31:20,890 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) [2021-12-16 05:31:20,891 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 276 transitions. [2021-12-16 05:31:20,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-16 05:31:20,892 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:31:20,892 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] [2021-12-16 05:31:20,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 05:31:21,105 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 [2021-12-16 05:31:21,105 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 05:31:21,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:31:21,106 INFO L85 PathProgramCache]: Analyzing trace with hash 379973459, now seen corresponding path program 1 times [2021-12-16 05:31:21,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:31:21,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957640235] [2021-12-16 05:31:21,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:31:21,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:31:21,146 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 05:31:21,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874192687] [2021-12-16 05:31:21,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:31:21,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:31:21,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:31:21,148 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) [2021-12-16 05:31:21,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 05:31:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:31:21,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 05:31:21,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:31:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:31:22,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:31:22,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:31:22,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957640235] [2021-12-16 05:31:22,121 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 05:31:22,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874192687] [2021-12-16 05:31:22,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874192687] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:31:22,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:31:22,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:31:22,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672164015] [2021-12-16 05:31:22,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:31:22,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:31:22,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:31:22,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:31:22,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:31:22,123 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) [2021-12-16 05:31:22,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:31:22,156 INFO L93 Difference]: Finished difference Result 414 states and 501 transitions. [2021-12-16 05:31:22,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:31:22,158 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 [2021-12-16 05:31:22,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:31:22,161 INFO L225 Difference]: With dead ends: 414 [2021-12-16 05:31:22,161 INFO L226 Difference]: Without dead ends: 234 [2021-12-16 05:31:22,161 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 [2021-12-16 05:31:22,164 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 [2021-12-16 05:31:22,164 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] [2021-12-16 05:31:22,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-16 05:31:22,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2021-12-16 05:31:22,176 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) [2021-12-16 05:31:22,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 280 transitions. [2021-12-16 05:31:22,177 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 280 transitions. Word has length 118 [2021-12-16 05:31:22,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:31:22,178 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 280 transitions. [2021-12-16 05:31:22,178 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) [2021-12-16 05:31:22,178 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 280 transitions. [2021-12-16 05:31:22,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-16 05:31:22,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:31:22,179 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] [2021-12-16 05:31:22,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 05:31:22,403 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 [2021-12-16 05:31:22,403 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 05:31:22,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:31:22,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1827414795, now seen corresponding path program 1 times [2021-12-16 05:31:22,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:31:22,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132773211] [2021-12-16 05:31:22,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:31:22,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:31:22,442 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 05:31:22,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [239799310] [2021-12-16 05:31:22,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:31:22,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:31:22,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:31:22,444 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) [2021-12-16 05:31:22,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 05:31:23,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:31:23,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 05:31:23,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:31:23,864 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:31:23,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:31:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:31:24,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:31:24,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132773211] [2021-12-16 05:31:24,129 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 05:31:24,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239799310] [2021-12-16 05:31:24,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239799310] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:31:24,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:31:24,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-16 05:31:24,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46456329] [2021-12-16 05:31:24,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:31:24,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 05:31:24,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:31:24,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 05:31:24,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:31:24,131 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) [2021-12-16 05:31:24,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:31:24,260 INFO L93 Difference]: Finished difference Result 428 states and 522 transitions. [2021-12-16 05:31:24,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 05:31:24,260 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 [2021-12-16 05:31:24,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:31:24,262 INFO L225 Difference]: With dead ends: 428 [2021-12-16 05:31:24,262 INFO L226 Difference]: Without dead ends: 245 [2021-12-16 05:31:24,263 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 [2021-12-16 05:31:24,263 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, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:31:24,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1045 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:31:24,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-16 05:31:24,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 243. [2021-12-16 05:31:24,271 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) [2021-12-16 05:31:24,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 294 transitions. [2021-12-16 05:31:24,272 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 294 transitions. Word has length 120 [2021-12-16 05:31:24,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:31:24,272 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 294 transitions. [2021-12-16 05:31:24,272 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) [2021-12-16 05:31:24,273 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 294 transitions. [2021-12-16 05:31:24,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-16 05:31:24,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:31:24,274 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] [2021-12-16 05:31:24,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 05:31:24,475 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 [2021-12-16 05:31:24,475 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 05:31:24,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:31:24,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1544509267, now seen corresponding path program 2 times [2021-12-16 05:31:24,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:31:24,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313695146] [2021-12-16 05:31:24,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:31:24,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:31:24,514 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 05:31:24,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857911122] [2021-12-16 05:31:24,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:31:24,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:31:24,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:31:24,516 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) [2021-12-16 05:31:24,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 05:31:25,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:31:25,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:31:25,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 05:31:25,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:31:25,489 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:31:25,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:31:25,808 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 05:31:25,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:31:25,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313695146] [2021-12-16 05:31:25,808 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 05:31:25,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857911122] [2021-12-16 05:31:25,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857911122] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:31:25,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:31:25,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-12-16 05:31:25,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572960516] [2021-12-16 05:31:25,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:31:25,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 05:31:25,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:31:25,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 05:31:25,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-12-16 05:31:25,810 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) [2021-12-16 05:31:26,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:31:26,107 INFO L93 Difference]: Finished difference Result 443 states and 545 transitions. [2021-12-16 05:31:26,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 05:31:26,107 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 [2021-12-16 05:31:26,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:31:26,109 INFO L225 Difference]: With dead ends: 443 [2021-12-16 05:31:26,109 INFO L226 Difference]: Without dead ends: 262 [2021-12-16 05:31:26,110 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 [2021-12-16 05:31:26,111 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 [2021-12-16 05:31:26,111 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] [2021-12-16 05:31:26,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-12-16 05:31:26,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 249. [2021-12-16 05:31:26,120 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) [2021-12-16 05:31:26,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 306 transitions. [2021-12-16 05:31:26,122 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 306 transitions. Word has length 124 [2021-12-16 05:31:26,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:31:26,122 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 306 transitions. [2021-12-16 05:31:26,122 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) [2021-12-16 05:31:26,123 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 306 transitions. [2021-12-16 05:31:26,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-16 05:31:26,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:31:26,124 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] [2021-12-16 05:31:26,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 05:31:26,339 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 [2021-12-16 05:31:26,340 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 05:31:26,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:31:26,340 INFO L85 PathProgramCache]: Analyzing trace with hash -515004461, now seen corresponding path program 3 times [2021-12-16 05:31:26,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:31:26,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219616680] [2021-12-16 05:31:26,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:31:26,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:31:26,384 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 05:31:26,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1862406539] [2021-12-16 05:31:26,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 05:31:26,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:31:26,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:31:26,386 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) [2021-12-16 05:31:26,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process