./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-1.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_OAT_test4-1.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 765142a1ef820c0c2cf2fa98a3978a1412f5a1196c629c20848264001100dcc9 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 18:03:41,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 18:03:41,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 18:03:41,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 18:03:41,274 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 18:03:41,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 18:03:41,276 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 18:03:41,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 18:03:41,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 18:03:41,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 18:03:41,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 18:03:41,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 18:03:41,286 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 18:03:41,288 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 18:03:41,289 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 18:03:41,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 18:03:41,293 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 18:03:41,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 18:03:41,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 18:03:41,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 18:03:41,304 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 18:03:41,305 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 18:03:41,306 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 18:03:41,307 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 18:03:41,308 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 18:03:41,310 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 18:03:41,311 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 18:03:41,311 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 18:03:41,312 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 18:03:41,313 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 18:03:41,313 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 18:03:41,314 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 18:03:41,315 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 18:03:41,316 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 18:03:41,317 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 18:03:41,317 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 18:03:41,318 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 18:03:41,318 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 18:03:41,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 18:03:41,319 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 18:03:41,319 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 18:03:41,320 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-18 18:03:41,342 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 18:03:41,342 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 18:03:41,343 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 18:03:41,343 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 18:03:41,344 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 18:03:41,344 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 18:03:41,344 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 18:03:41,344 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 18:03:41,345 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 18:03:41,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 18:03:41,346 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 18:03:41,346 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 18:03:41,346 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 18:03:41,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 18:03:41,346 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-18 18:03:41,347 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 18:03:41,347 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-18 18:03:41,347 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 18:03:41,347 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-18 18:03:41,347 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 18:03:41,347 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-18 18:03:41,348 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 18:03:41,348 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 18:03:41,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 18:03:41,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 18:03:41,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 18:03:41,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 18:03:41,349 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-18 18:03:41,349 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 18:03:41,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 18:03:41,349 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-18 18:03:41,349 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-18 18:03:41,349 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-18 18:03:41,350 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 18:03:41,350 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 765142a1ef820c0c2cf2fa98a3978a1412f5a1196c629c20848264001100dcc9 [2021-12-18 18:03:41,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 18:03:41,575 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 18:03:41,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 18:03:41,577 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 18:03:41,578 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 18:03:41,578 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-1.i [2021-12-18 18:03:41,622 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbbbfbf0f/42766dfc76b64112a84cf36b446615aa/FLAG17d43d566 [2021-12-18 18:03:42,061 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 18:03:42,062 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-1.i [2021-12-18 18:03:42,075 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbbbfbf0f/42766dfc76b64112a84cf36b446615aa/FLAG17d43d566 [2021-12-18 18:03:42,381 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbbbfbf0f/42766dfc76b64112a84cf36b446615aa [2021-12-18 18:03:42,383 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 18:03:42,384 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 18:03:42,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 18:03:42,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 18:03:42,387 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 18:03:42,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 06:03:42" (1/1) ... [2021-12-18 18:03:42,389 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1337a4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:03:42, skipping insertion in model container [2021-12-18 18:03:42,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 06:03:42" (1/1) ... [2021-12-18 18:03:42,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 18:03:42,422 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 18:03:42,762 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-1.i[33021,33034] [2021-12-18 18:03:42,879 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 18:03:42,885 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 18:03:42,902 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_OAT_test4-1.i[33021,33034] [2021-12-18 18:03:42,947 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 18:03:42,988 INFO L208 MainTranslator]: Completed translation [2021-12-18 18:03:42,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:03:42 WrapperNode [2021-12-18 18:03:42,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 18:03:42,990 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 18:03:42,990 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 18:03:42,990 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 18:03:42,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:03:42" (1/1) ... [2021-12-18 18:03:43,032 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:03:42" (1/1) ... [2021-12-18 18:03:43,086 INFO L137 Inliner]: procedures = 177, calls = 349, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1153 [2021-12-18 18:03:43,087 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 18:03:43,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 18:03:43,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 18:03:43,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 18:03:43,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:03:42" (1/1) ... [2021-12-18 18:03:43,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:03:42" (1/1) ... [2021-12-18 18:03:43,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:03:42" (1/1) ... [2021-12-18 18:03:43,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:03:42" (1/1) ... [2021-12-18 18:03:43,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:03:42" (1/1) ... [2021-12-18 18:03:43,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:03:42" (1/1) ... [2021-12-18 18:03:43,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:03:42" (1/1) ... [2021-12-18 18:03:43,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 18:03:43,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 18:03:43,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 18:03:43,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 18:03:43,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:03:42" (1/1) ... [2021-12-18 18:03:43,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 18:03:43,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:03:43,212 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-18 18:03:43,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-18 18:03:43,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 18:03:43,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-18 18:03:43,240 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-18 18:03:43,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 18:03:43,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-18 18:03:43,240 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-18 18:03:43,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 18:03:43,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 18:03:43,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 18:03:43,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 18:03:43,241 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 18:03:43,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 18:03:43,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-18 18:03:43,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 18:03:43,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 18:03:43,464 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 18:03:43,465 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 18:03:44,278 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 18:03:44,286 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 18:03:44,286 INFO L301 CfgBuilder]: Removed 60 assume(true) statements. [2021-12-18 18:03:44,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 06:03:44 BoogieIcfgContainer [2021-12-18 18:03:44,287 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 18:03:44,289 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 18:03:44,289 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 18:03:44,292 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 18:03:44,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 06:03:42" (1/3) ... [2021-12-18 18:03:44,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cfb525d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 06:03:44, skipping insertion in model container [2021-12-18 18:03:44,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:03:42" (2/3) ... [2021-12-18 18:03:44,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cfb525d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 06:03:44, skipping insertion in model container [2021-12-18 18:03:44,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 06:03:44" (3/3) ... [2021-12-18 18:03:44,294 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test4-1.i [2021-12-18 18:03:44,298 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 18:03:44,298 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-18 18:03:44,335 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 18:03:44,345 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-18 18:03:44,345 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-18 18:03:44,363 INFO L276 IsEmpty]: Start isEmpty. Operand has 211 states, 191 states have (on average 1.6806282722513088) internal successors, (321), 202 states have internal predecessors, (321), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-18 18:03:44,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-18 18:03:44,366 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:03:44,366 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:03:44,366 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:03:44,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:03:44,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1530402564, now seen corresponding path program 1 times [2021-12-18 18:03:44,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:03:44,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86185194] [2021-12-18 18:03:44,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:03:44,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:03:44,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:03:44,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 18:03:44,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:03:44,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86185194] [2021-12-18 18:03:44,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86185194] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:03:44,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:03:44,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 18:03:44,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464353178] [2021-12-18 18:03:44,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:03:44,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 18:03:44,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:03:44,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 18:03:44,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 18:03:44,541 INFO L87 Difference]: Start difference. First operand has 211 states, 191 states have (on average 1.6806282722513088) internal successors, (321), 202 states have internal predecessors, (321), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:03:44,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:03:44,593 INFO L93 Difference]: Finished difference Result 590 states and 1005 transitions. [2021-12-18 18:03:44,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 18:03:44,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-18 18:03:44,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:03:44,605 INFO L225 Difference]: With dead ends: 590 [2021-12-18 18:03:44,607 INFO L226 Difference]: Without dead ends: 377 [2021-12-18 18:03:44,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 18:03:44,618 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 211 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 18:03:44,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 572 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 18:03:44,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-18 18:03:44,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 208. [2021-12-18 18:03:44,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 189 states have (on average 1.3227513227513228) internal successors, (250), 199 states have internal predecessors, (250), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-18 18:03:44,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 282 transitions. [2021-12-18 18:03:44,694 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 282 transitions. Word has length 10 [2021-12-18 18:03:44,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:03:44,694 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 282 transitions. [2021-12-18 18:03:44,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:03:44,695 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 282 transitions. [2021-12-18 18:03:44,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-18 18:03:44,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:03:44,704 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:03:44,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 18:03:44,705 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:03:44,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:03:44,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1947342789, now seen corresponding path program 1 times [2021-12-18 18:03:44,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:03:44,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187019674] [2021-12-18 18:03:44,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:03:44,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:03:44,920 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:03:44,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1654493102] [2021-12-18 18:03:44,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:03:44,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:03:44,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:03:44,932 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 18:03:44,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 18:03:45,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:03:45,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 2973 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 18:03:45,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:03:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 18:03:46,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:03:46,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:03:46,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187019674] [2021-12-18 18:03:46,015 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:03:46,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654493102] [2021-12-18 18:03:46,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654493102] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:03:46,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:03:46,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 18:03:46,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048276414] [2021-12-18 18:03:46,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:03:46,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 18:03:46,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:03:46,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 18:03:46,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 18:03:46,018 INFO L87 Difference]: Start difference. First operand 208 states and 282 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:03:46,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:03:46,096 INFO L93 Difference]: Finished difference Result 434 states and 592 transitions. [2021-12-18 18:03:46,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 18:03:46,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-18 18:03:46,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:03:46,098 INFO L225 Difference]: With dead ends: 434 [2021-12-18 18:03:46,098 INFO L226 Difference]: Without dead ends: 229 [2021-12-18 18:03:46,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 18:03:46,100 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 9 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 18:03:46,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 507 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 18:03:46,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-12-18 18:03:46,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2021-12-18 18:03:46,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 209 states have (on average 1.291866028708134) internal successors, (270), 219 states have internal predecessors, (270), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-18 18:03:46,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 302 transitions. [2021-12-18 18:03:46,107 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 302 transitions. Word has length 108 [2021-12-18 18:03:46,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:03:46,108 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 302 transitions. [2021-12-18 18:03:46,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:03:46,108 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 302 transitions. [2021-12-18 18:03:46,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-18 18:03:46,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:03:46,109 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:03:46,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-18 18:03:46,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:03:46,338 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:03:46,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:03:46,338 INFO L85 PathProgramCache]: Analyzing trace with hash -728649593, now seen corresponding path program 1 times [2021-12-18 18:03:46,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:03:46,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565522966] [2021-12-18 18:03:46,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:03:46,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:03:46,469 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:03:46,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291777168] [2021-12-18 18:03:46,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:03:46,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:03:46,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:03:46,490 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 18:03:46,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 18:03:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:03:47,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 2975 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 18:03:47,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:03:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 18:03:47,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:03:47,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:03:47,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565522966] [2021-12-18 18:03:47,532 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:03:47,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291777168] [2021-12-18 18:03:47,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291777168] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:03:47,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:03:47,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 18:03:47,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763991077] [2021-12-18 18:03:47,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:03:47,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 18:03:47,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:03:47,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 18:03:47,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 18:03:47,535 INFO L87 Difference]: Start difference. First operand 228 states and 302 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:03:47,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:03:47,591 INFO L93 Difference]: Finished difference Result 474 states and 632 transitions. [2021-12-18 18:03:47,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 18:03:47,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-18 18:03:47,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:03:47,594 INFO L225 Difference]: With dead ends: 474 [2021-12-18 18:03:47,594 INFO L226 Difference]: Without dead ends: 249 [2021-12-18 18:03:47,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 18:03:47,596 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 8 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 18:03:47,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 509 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 18:03:47,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-12-18 18:03:47,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 248. [2021-12-18 18:03:47,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 229 states have (on average 1.2663755458515285) internal successors, (290), 239 states have internal predecessors, (290), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-18 18:03:47,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 322 transitions. [2021-12-18 18:03:47,604 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 322 transitions. Word has length 108 [2021-12-18 18:03:47,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:03:47,604 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 322 transitions. [2021-12-18 18:03:47,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:03:47,605 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 322 transitions. [2021-12-18 18:03:47,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-18 18:03:47,606 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:03:47,606 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:03:47,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 18:03:47,818 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,SelfDestructingSolverStorable2 [2021-12-18 18:03:47,818 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:03:47,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:03:47,819 INFO L85 PathProgramCache]: Analyzing trace with hash -656263035, now seen corresponding path program 1 times [2021-12-18 18:03:47,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:03:47,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600527305] [2021-12-18 18:03:47,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:03:47,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:03:47,990 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:03:47,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1545588045] [2021-12-18 18:03:47,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:03:47,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:03:47,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:03:48,008 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 18:03:48,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 18:03:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:03:49,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 2977 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 18:03:49,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:03:49,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 18:03:49,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:03:49,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:03:49,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600527305] [2021-12-18 18:03:49,303 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:03:49,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545588045] [2021-12-18 18:03:49,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545588045] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:03:49,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:03:49,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 18:03:49,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235744798] [2021-12-18 18:03:49,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:03:49,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 18:03:49,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:03:49,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 18:03:49,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 18:03:49,305 INFO L87 Difference]: Start difference. First operand 248 states and 322 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:03:49,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:03:49,430 INFO L93 Difference]: Finished difference Result 485 states and 633 transitions. [2021-12-18 18:03:49,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 18:03:49,431 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-18 18:03:49,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:03:49,432 INFO L225 Difference]: With dead ends: 485 [2021-12-18 18:03:49,432 INFO L226 Difference]: Without dead ends: 240 [2021-12-18 18:03:49,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 18:03:49,434 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 228 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 540 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 [2021-12-18 18:03:49,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 540 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 18:03:49,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-18 18:03:49,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 234. [2021-12-18 18:03:49,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 215 states have (on average 1.2511627906976743) internal successors, (269), 225 states have internal predecessors, (269), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-18 18:03:49,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 301 transitions. [2021-12-18 18:03:49,453 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 301 transitions. Word has length 108 [2021-12-18 18:03:49,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:03:49,454 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 301 transitions. [2021-12-18 18:03:49,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:03:49,454 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 301 transitions. [2021-12-18 18:03:49,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-18 18:03:49,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:03:49,456 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:03:49,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-18 18:03:49,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:03:49,660 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:03:49,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:03:49,661 INFO L85 PathProgramCache]: Analyzing trace with hash -2048110665, now seen corresponding path program 1 times [2021-12-18 18:03:49,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:03:49,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164556898] [2021-12-18 18:03:49,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:03:49,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:03:49,872 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:03:49,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408568047] [2021-12-18 18:03:49,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:03:49,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:03:49,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:03:49,874 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 18:03:49,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 18:03:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:03:51,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 2963 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 18:03:51,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:03:51,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 18:03:51,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:03:51,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:03:51,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164556898] [2021-12-18 18:03:51,317 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:03:51,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408568047] [2021-12-18 18:03:51,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408568047] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:03:51,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:03:51,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 18:03:51,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498564191] [2021-12-18 18:03:51,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:03:51,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 18:03:51,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:03:51,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 18:03:51,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 18:03:51,320 INFO L87 Difference]: Start difference. First operand 234 states and 301 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:03:51,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:03:51,415 INFO L93 Difference]: Finished difference Result 546 states and 700 transitions. [2021-12-18 18:03:51,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 18:03:51,416 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-18 18:03:51,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:03:51,417 INFO L225 Difference]: With dead ends: 546 [2021-12-18 18:03:51,418 INFO L226 Difference]: Without dead ends: 315 [2021-12-18 18:03:51,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 18:03:51,419 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 226 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 18:03:51,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 835 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 18:03:51,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-12-18 18:03:51,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 220. [2021-12-18 18:03:51,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 201 states have (on average 1.2338308457711442) internal successors, (248), 211 states have internal predecessors, (248), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-18 18:03:51,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 280 transitions. [2021-12-18 18:03:51,433 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 280 transitions. Word has length 108 [2021-12-18 18:03:51,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:03:51,436 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 280 transitions. [2021-12-18 18:03:51,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:03:51,437 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 280 transitions. [2021-12-18 18:03:51,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-18 18:03:51,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:03:51,438 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:03:51,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-18 18:03:51,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:03:51,664 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:03:51,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:03:51,664 INFO L85 PathProgramCache]: Analyzing trace with hash 452622147, now seen corresponding path program 1 times [2021-12-18 18:03:51,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:03:51,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691170524] [2021-12-18 18:03:51,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:03:51,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:03:51,801 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:03:51,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405331945] [2021-12-18 18:03:51,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:03:51,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:03:51,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:03:51,804 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 18:03:51,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 18:03:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:03:53,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 2951 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 18:03:53,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:03:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 18:03:53,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 18:03:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 18:03:53,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:03:53,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691170524] [2021-12-18 18:03:53,620 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:03:53,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405331945] [2021-12-18 18:03:53,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405331945] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 18:03:53,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 18:03:53,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-18 18:03:53,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741824810] [2021-12-18 18:03:53,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 18:03:53,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 18:03:53,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:03:53,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 18:03:53,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-18 18:03:53,623 INFO L87 Difference]: Start difference. First operand 220 states and 280 transitions. Second operand has 6 states, 6 states have (on average 34.5) internal successors, (207), 6 states have internal predecessors, (207), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:03:53,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:03:53,709 INFO L93 Difference]: Finished difference Result 797 states and 999 transitions. [2021-12-18 18:03:53,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 18:03:53,710 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 34.5) internal successors, (207), 6 states have internal predecessors, (207), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-18 18:03:53,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:03:53,713 INFO L225 Difference]: With dead ends: 797 [2021-12-18 18:03:53,713 INFO L226 Difference]: Without dead ends: 766 [2021-12-18 18:03:53,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-18 18:03:53,714 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 1150 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1174 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 18:03:53,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1174 Valid, 1176 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 18:03:53,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-12-18 18:03:53,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 766. [2021-12-18 18:03:53,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 729 states have (on average 1.2043895747599451) internal successors, (878), 739 states have internal predecessors, (878), 34 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (34), 25 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-18 18:03:53,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 946 transitions. [2021-12-18 18:03:53,740 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 946 transitions. Word has length 108 [2021-12-18 18:03:53,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:03:53,741 INFO L470 AbstractCegarLoop]: Abstraction has 766 states and 946 transitions. [2021-12-18 18:03:53,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 34.5) internal successors, (207), 6 states have internal predecessors, (207), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:03:53,741 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 946 transitions. [2021-12-18 18:03:53,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2021-12-18 18:03:53,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:03:53,745 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:03:53,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 18:03:53,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:03:53,960 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:03:53,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:03:53,960 INFO L85 PathProgramCache]: Analyzing trace with hash -2048677992, now seen corresponding path program 2 times [2021-12-18 18:03:53,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:03:53,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986854257] [2021-12-18 18:03:53,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:03:53,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:03:54,409 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:03:54,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136418448] [2021-12-18 18:03:54,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 18:03:54,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:03:54,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:03:54,411 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 18:03:54,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 18:03:56,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-18 18:03:56,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 18:03:56,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 18:03:56,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:03:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2021-12-18 18:03:58,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:03:58,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:03:58,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986854257] [2021-12-18 18:03:58,097 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:03:58,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136418448] [2021-12-18 18:03:58,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136418448] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:03:58,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:03:58,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 18:03:58,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286177960] [2021-12-18 18:03:58,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:03:58,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 18:03:58,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:03:58,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 18:03:58,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 18:03:58,099 INFO L87 Difference]: Start difference. First operand 766 states and 946 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:03:58,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:03:58,396 INFO L93 Difference]: Finished difference Result 1385 states and 1717 transitions. [2021-12-18 18:03:58,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 18:03:58,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 402 [2021-12-18 18:03:58,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:03:58,399 INFO L225 Difference]: With dead ends: 1385 [2021-12-18 18:03:58,399 INFO L226 Difference]: Without dead ends: 764 [2021-12-18 18:03:58,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 18:03:58,400 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 65 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 18:03:58,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 731 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 18:03:58,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-12-18 18:03:58,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 764. [2021-12-18 18:03:58,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 727 states have (on average 1.203576341127923) internal successors, (875), 737 states have internal predecessors, (875), 34 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (34), 25 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-18 18:03:58,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 943 transitions. [2021-12-18 18:03:58,415 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 943 transitions. Word has length 402 [2021-12-18 18:03:58,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:03:58,415 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 943 transitions. [2021-12-18 18:03:58,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:03:58,416 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 943 transitions. [2021-12-18 18:03:58,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2021-12-18 18:03:58,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:03:58,423 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-12-18 18:03:58,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 18:03:58,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:03:58,645 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:03:58,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:03:58,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1854420055, now seen corresponding path program 1 times [2021-12-18 18:03:58,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:03:58,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082201146] [2021-12-18 18:03:58,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:03:58,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:03:59,243 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:03:59,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [234145306] [2021-12-18 18:03:59,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:03:59,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:03:59,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:03:59,244 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 18:03:59,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 18:04:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:04:03,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 10743 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 18:04:03,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:04:03,971 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 586 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 18:04:03,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 18:04:04,547 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 586 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 18:04:04,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:04:04,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082201146] [2021-12-18 18:04:04,547 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:04:04,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234145306] [2021-12-18 18:04:04,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234145306] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 18:04:04,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 18:04:04,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-18 18:04:04,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088338505] [2021-12-18 18:04:04,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 18:04:04,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 18:04:04,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:04:04,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 18:04:04,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-12-18 18:04:04,550 INFO L87 Difference]: Start difference. First operand 764 states and 943 transitions. Second operand has 12 states, 12 states have (on average 67.33333333333333) internal successors, (808), 12 states have internal predecessors, (808), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 18:04:04,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:04:04,796 INFO L93 Difference]: Finished difference Result 1887 states and 2331 transitions. [2021-12-18 18:04:04,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 18:04:04,797 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 67.33333333333333) internal successors, (808), 12 states have internal predecessors, (808), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 417 [2021-12-18 18:04:04,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:04:04,803 INFO L225 Difference]: With dead ends: 1887 [2021-12-18 18:04:04,804 INFO L226 Difference]: Without dead ends: 1856 [2021-12-18 18:04:04,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 822 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-12-18 18:04:04,804 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 2345 mSDsluCounter, 2304 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2401 SdHoareTripleChecker+Valid, 2680 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 18:04:04,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2401 Valid, 2680 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 18:04:04,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2021-12-18 18:04:04,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1856. [2021-12-18 18:04:04,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1783 states have (on average 1.1974200785193494) internal successors, (2135), 1793 states have internal predecessors, (2135), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 61 states have call predecessors, (70), 70 states have call successors, (70) [2021-12-18 18:04:04,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 2275 transitions. [2021-12-18 18:04:04,839 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 2275 transitions. Word has length 417 [2021-12-18 18:04:04,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:04:04,839 INFO L470 AbstractCegarLoop]: Abstraction has 1856 states and 2275 transitions. [2021-12-18 18:04:04,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 67.33333333333333) internal successors, (808), 12 states have internal predecessors, (808), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 18:04:04,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 2275 transitions. [2021-12-18 18:04:04,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1006 [2021-12-18 18:04:04,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:04:04,858 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 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] [2021-12-18 18:04:04,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-18 18:04:05,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:04:05,078 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:04:05,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:04:05,079 INFO L85 PathProgramCache]: Analyzing trace with hash 240290707, now seen corresponding path program 2 times [2021-12-18 18:04:05,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:04:05,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186421153] [2021-12-18 18:04:05,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:04:05,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:04:06,296 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:04:06,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [757865367] [2021-12-18 18:04:06,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 18:04:06,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:04:06,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:04:06,298 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 18:04:06,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 18:04:14,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 18:04:14,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 18:04:14,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 28053 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 18:04:14,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:04:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4406 backedges. 325 proven. 0 refuted. 0 times theorem prover too weak. 4081 trivial. 0 not checked. [2021-12-18 18:04:15,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:04:15,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:04:15,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186421153] [2021-12-18 18:04:15,996 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:04:15,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757865367] [2021-12-18 18:04:15,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757865367] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:04:15,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:04:15,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 18:04:15,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976793464] [2021-12-18 18:04:15,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:04:15,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 18:04:15,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:04:15,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 18:04:15,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 18:04:15,997 INFO L87 Difference]: Start difference. First operand 1856 states and 2275 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 18:04:16,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:04:16,053 INFO L93 Difference]: Finished difference Result 3654 states and 4484 transitions. [2021-12-18 18:04:16,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 18:04:16,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 1005 [2021-12-18 18:04:16,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:04:16,074 INFO L225 Difference]: With dead ends: 3654 [2021-12-18 18:04:16,074 INFO L226 Difference]: Without dead ends: 1854 [2021-12-18 18:04:16,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1004 GetRequests, 1003 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 18:04:16,077 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 15 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 18:04:16,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 518 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 18:04:16,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-12-18 18:04:16,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1854. [2021-12-18 18:04:16,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1854 states, 1781 states have (on average 1.197080291970803) internal successors, (2132), 1791 states have internal predecessors, (2132), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 61 states have call predecessors, (70), 70 states have call successors, (70) [2021-12-18 18:04:16,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1854 states to 1854 states and 2272 transitions. [2021-12-18 18:04:16,106 INFO L78 Accepts]: Start accepts. Automaton has 1854 states and 2272 transitions. Word has length 1005 [2021-12-18 18:04:16,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:04:16,107 INFO L470 AbstractCegarLoop]: Abstraction has 1854 states and 2272 transitions. [2021-12-18 18:04:16,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 18:04:16,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1854 states and 2272 transitions. [2021-12-18 18:04:16,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1021 [2021-12-18 18:04:16,127 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:04:16,128 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:04:16,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-18 18:04:16,355 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,SelfDestructingSolverStorable8 [2021-12-18 18:04:16,356 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:04:16,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:04:16,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1485403054, now seen corresponding path program 1 times [2021-12-18 18:04:16,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:04:16,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451603938] [2021-12-18 18:04:16,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:04:16,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:04:17,420 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:04:17,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1630858531] [2021-12-18 18:04:17,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:04:17,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:04:17,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:04:17,422 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 18:04:17,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process Killed by 15