./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5b36d44f 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/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-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 64bit --witnessprinter.graph.data.programhash 1cccbd170603672b3f74a5336cc730c4afa341837cef68e5226707c3c82e670c --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5b36d44 [2021-11-07 13:04:54,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 13:04:54,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 13:04:54,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 13:04:54,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 13:04:54,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 13:04:54,315 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 13:04:54,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 13:04:54,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 13:04:54,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 13:04:54,324 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 13:04:54,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 13:04:54,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 13:04:54,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 13:04:54,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 13:04:54,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 13:04:54,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 13:04:54,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 13:04:54,334 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 13:04:54,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 13:04:54,339 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 13:04:54,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 13:04:54,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 13:04:54,353 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 13:04:54,354 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 13:04:54,354 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 13:04:54,354 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 13:04:54,355 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 13:04:54,355 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 13:04:54,356 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 13:04:54,356 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 13:04:54,356 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 13:04:54,357 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 13:04:54,357 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 13:04:54,357 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 13:04:54,358 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 13:04:54,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 13:04:54,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 13:04:54,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 13:04:54,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 13:04:54,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 13:04:54,364 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-07 13:04:54,391 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 13:04:54,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 13:04:54,408 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 13:04:54,408 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 13:04:54,409 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 13:04:54,409 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 13:04:54,409 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 13:04:54,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 13:04:54,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 13:04:54,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 13:04:54,410 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 13:04:54,410 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 13:04:54,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 13:04:54,411 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 13:04:54,411 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 13:04:54,411 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 13:04:54,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 13:04:54,411 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 13:04:54,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 13:04:54,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 13:04:54,412 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 13:04:54,412 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 13:04:54,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 13:04:54,412 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 13:04:54,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 13:04:54,412 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 13:04:54,413 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 13:04:54,413 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 13:04:54,414 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 13:04:54,414 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cccbd170603672b3f74a5336cc730c4afa341837cef68e5226707c3c82e670c [2021-11-07 13:04:54,616 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 13:04:54,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 13:04:54,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 13:04:54,641 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 13:04:54,642 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 13:04:54,643 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2021-11-07 13:04:54,688 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50c67b5b7/2da05ba2d19047dbb8d2d5b4ce9a998d/FLAG89d703816 [2021-11-07 13:04:55,231 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 13:04:55,232 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2021-11-07 13:04:55,263 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50c67b5b7/2da05ba2d19047dbb8d2d5b4ce9a998d/FLAG89d703816 [2021-11-07 13:04:55,725 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50c67b5b7/2da05ba2d19047dbb8d2d5b4ce9a998d [2021-11-07 13:04:55,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 13:04:55,728 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 13:04:55,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 13:04:55,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 13:04:55,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 13:04:55,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:04:55" (1/1) ... [2021-11-07 13:04:55,733 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f316c25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:55, skipping insertion in model container [2021-11-07 13:04:55,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:04:55" (1/1) ... [2021-11-07 13:04:55,737 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 13:04:55,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 13:04:56,333 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i[158694,158707] [2021-11-07 13:04:56,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 13:04:56,723 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 13:04:56,827 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i[158694,158707] [2021-11-07 13:04:56,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 13:04:56,981 INFO L208 MainTranslator]: Completed translation [2021-11-07 13:04:56,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:56 WrapperNode [2021-11-07 13:04:56,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 13:04:56,984 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 13:04:56,984 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 13:04:56,984 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 13:04:56,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:56" (1/1) ... [2021-11-07 13:04:57,039 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:56" (1/1) ... [2021-11-07 13:04:57,200 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 13:04:57,201 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 13:04:57,201 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 13:04:57,201 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 13:04:57,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:56" (1/1) ... [2021-11-07 13:04:57,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:56" (1/1) ... [2021-11-07 13:04:57,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:56" (1/1) ... [2021-11-07 13:04:57,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:56" (1/1) ... [2021-11-07 13:04:57,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:56" (1/1) ... [2021-11-07 13:04:57,327 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:56" (1/1) ... [2021-11-07 13:04:57,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:56" (1/1) ... [2021-11-07 13:04:57,368 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 13:04:57,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 13:04:57,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 13:04:57,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 13:04:57,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:56" (1/1) ... [2021-11-07 13:04:57,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 13:04:57,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:04:57,421 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 13:04:57,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 13:04:57,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-07 13:04:57,481 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-07 13:04:57,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 13:04:57,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 13:04:57,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 13:04:57,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 13:04:57,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 13:04:57,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 13:04:57,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 13:04:57,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 13:04:57,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 13:04:57,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 13:04:57,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 13:04:57,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-07 13:04:57,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 13:04:57,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 13:04:59,709 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 13:04:59,709 INFO L299 CfgBuilder]: Removed 1048 assume(true) statements. [2021-11-07 13:04:59,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:04:59 BoogieIcfgContainer [2021-11-07 13:04:59,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 13:04:59,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 13:04:59,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 13:04:59,716 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 13:04:59,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:04:55" (1/3) ... [2021-11-07 13:04:59,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c0d1bfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:04:59, skipping insertion in model container [2021-11-07 13:04:59,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:56" (2/3) ... [2021-11-07 13:04:59,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c0d1bfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:04:59, skipping insertion in model container [2021-11-07 13:04:59,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:04:59" (3/3) ... [2021-11-07 13:04:59,717 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2021-11-07 13:04:59,720 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 13:04:59,720 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 13:04:59,754 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 13:04:59,758 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 13:04:59,758 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 13:04:59,779 INFO L276 IsEmpty]: Start isEmpty. Operand has 1019 states, 1017 states have (on average 1.5024582104228121) internal successors, (1528), 1018 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:04:59,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 13:04:59,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:04:59,786 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] [2021-11-07 13:04:59,787 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:04:59,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:04:59,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1191082698, now seen corresponding path program 1 times [2021-11-07 13:04:59,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:04:59,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91553533] [2021-11-07 13:04:59,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:04:59,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:04:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:05:00,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:00,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91553533] [2021-11-07 13:05:00,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91553533] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:05:00,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:05:00,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:05:00,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810390750] [2021-11-07 13:05:00,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:00,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:05:00,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:00,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:05:00,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:05:00,156 INFO L87 Difference]: Start difference. First operand has 1019 states, 1017 states have (on average 1.5024582104228121) internal successors, (1528), 1018 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:00,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:00,308 INFO L93 Difference]: Finished difference Result 2969 states and 4469 transitions. [2021-11-07 13:05:00,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:05:00,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 13:05:00,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:00,324 INFO L225 Difference]: With dead ends: 2969 [2021-11-07 13:05:00,324 INFO L226 Difference]: Without dead ends: 1941 [2021-11-07 13:05:00,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.69ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:05:00,348 INFO L933 BasicCegarLoop]: 1405 mSDtfsCounter, 1319 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1319 SdHoareTripleChecker+Valid, 2784 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.98ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72.36ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:00,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1319 Valid, 2784 Invalid, 15 Unknown, 0 Unchecked, 8.98ms Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 72.36ms Time] [2021-11-07 13:05:00,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2021-11-07 13:05:00,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 1941. [2021-11-07 13:05:00,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 1.3871134020618556) internal successors, (2691), 1940 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:00,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 2691 transitions. [2021-11-07 13:05:00,489 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 2691 transitions. Word has length 27 [2021-11-07 13:05:00,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:00,489 INFO L470 AbstractCegarLoop]: Abstraction has 1941 states and 2691 transitions. [2021-11-07 13:05:00,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:00,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 2691 transitions. [2021-11-07 13:05:00,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 13:05:00,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:00,496 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] [2021-11-07 13:05:00,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 13:05:00,496 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:00,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:00,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1908761624, now seen corresponding path program 1 times [2021-11-07 13:05:00,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:00,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179265205] [2021-11-07 13:05:00,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:00,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:00,559 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 13:05:00,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [19896817] [2021-11-07 13:05:00,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:00,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:05:00,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:05:00,561 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:05:00,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 13:05:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:00,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 13:05:00,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:05:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:05:00,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 13:05:00,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:00,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179265205] [2021-11-07 13:05:00,933 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 13:05:00,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19896817] [2021-11-07 13:05:00,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19896817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:05:00,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:05:00,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 13:05:00,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101821915] [2021-11-07 13:05:00,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:00,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:05:00,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:00,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:05:00,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:05:00,935 INFO L87 Difference]: Start difference. First operand 1941 states and 2691 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:00,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:00,979 INFO L93 Difference]: Finished difference Result 3854 states and 5349 transitions. [2021-11-07 13:05:00,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:05:00,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-07 13:05:00,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:00,985 INFO L225 Difference]: With dead ends: 3854 [2021-11-07 13:05:00,985 INFO L226 Difference]: Without dead ends: 1941 [2021-11-07 13:05:00,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.42ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:05:00,988 INFO L933 BasicCegarLoop]: 1385 mSDtfsCounter, 1373 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.36ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.57ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:00,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1373 Valid, 1385 Invalid, 8 Unknown, 0 Unchecked, 2.36ms Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 6.57ms Time] [2021-11-07 13:05:00,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2021-11-07 13:05:01,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 1941. [2021-11-07 13:05:01,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 1.3865979381443299) internal successors, (2690), 1940 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:01,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 2690 transitions. [2021-11-07 13:05:01,026 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 2690 transitions. Word has length 33 [2021-11-07 13:05:01,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:01,027 INFO L470 AbstractCegarLoop]: Abstraction has 1941 states and 2690 transitions. [2021-11-07 13:05:01,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:01,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 2690 transitions. [2021-11-07 13:05:01,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 13:05:01,029 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:01,029 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] [2021-11-07 13:05:01,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 13:05:01,242 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 [2021-11-07 13:05:01,243 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:01,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:01,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1321955610, now seen corresponding path program 1 times [2021-11-07 13:05:01,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:01,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525336404] [2021-11-07 13:05:01,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:01,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:01,307 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 13:05:01,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279442402] [2021-11-07 13:05:01,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:01,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:05:01,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:05:01,328 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:05:01,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 13:05:01,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:01,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 13:05:01,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:05:01,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:05:01,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 13:05:01,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:01,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525336404] [2021-11-07 13:05:01,805 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 13:05:01,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279442402] [2021-11-07 13:05:01,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279442402] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:05:01,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:05:01,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 13:05:01,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807077168] [2021-11-07 13:05:01,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:01,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 13:05:01,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:01,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 13:05:01,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:05:01,815 INFO L87 Difference]: Start difference. First operand 1941 states and 2690 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:02,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:02,267 INFO L93 Difference]: Finished difference Result 5765 states and 8003 transitions. [2021-11-07 13:05:02,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 13:05:02,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-07 13:05:02,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:02,285 INFO L225 Difference]: With dead ends: 5765 [2021-11-07 13:05:02,285 INFO L226 Difference]: Without dead ends: 3833 [2021-11-07 13:05:02,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.79ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 13:05:02,298 INFO L933 BasicCegarLoop]: 1280 mSDtfsCounter, 1338 mSDsluCounter, 3791 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 221.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1338 SdHoareTripleChecker+Valid, 5071 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.32ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 292.76ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:02,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1338 Valid, 5071 Invalid, 501 Unknown, 0 Unchecked, 16.32ms Time], IncrementalHoareTripleChecker [9 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 292.76ms Time] [2021-11-07 13:05:02,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3833 states. [2021-11-07 13:05:02,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3833 to 3681. [2021-11-07 13:05:02,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3681 states, 3680 states have (on average 1.389945652173913) internal successors, (5115), 3680 states have internal predecessors, (5115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:02,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3681 states to 3681 states and 5115 transitions. [2021-11-07 13:05:02,408 INFO L78 Accepts]: Start accepts. Automaton has 3681 states and 5115 transitions. Word has length 33 [2021-11-07 13:05:02,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:02,409 INFO L470 AbstractCegarLoop]: Abstraction has 3681 states and 5115 transitions. [2021-11-07 13:05:02,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:02,409 INFO L276 IsEmpty]: Start isEmpty. Operand 3681 states and 5115 transitions. [2021-11-07 13:05:02,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 13:05:02,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:02,417 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:02,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 13:05:02,631 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 [2021-11-07 13:05:02,632 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:02,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:02,633 INFO L85 PathProgramCache]: Analyzing trace with hash -148593795, now seen corresponding path program 1 times [2021-11-07 13:05:02,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:02,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900311293] [2021-11-07 13:05:02,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:02,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:05:02,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:02,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900311293] [2021-11-07 13:05:02,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900311293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:05:02,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:05:02,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:05:02,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797977029] [2021-11-07 13:05:02,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:02,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:05:02,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:02,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:05:02,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:05:02,768 INFO L87 Difference]: Start difference. First operand 3681 states and 5115 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:02,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:02,946 INFO L93 Difference]: Finished difference Result 9529 states and 13314 transitions. [2021-11-07 13:05:02,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:05:02,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 13:05:02,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:02,961 INFO L225 Difference]: With dead ends: 9529 [2021-11-07 13:05:02,961 INFO L226 Difference]: Without dead ends: 5876 [2021-11-07 13:05:02,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.89ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:05:02,969 INFO L933 BasicCegarLoop]: 1414 mSDtfsCounter, 849 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 2735 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.12ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.41ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:02,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [849 Valid, 2735 Invalid, 41 Unknown, 0 Unchecked, 3.12ms Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 35.41ms Time] [2021-11-07 13:05:02,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5876 states. [2021-11-07 13:05:03,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5876 to 5855. [2021-11-07 13:05:03,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5855 states, 5854 states have (on average 1.4016057396651862) internal successors, (8205), 5854 states have internal predecessors, (8205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:03,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5855 states to 5855 states and 8205 transitions. [2021-11-07 13:05:03,105 INFO L78 Accepts]: Start accepts. Automaton has 5855 states and 8205 transitions. Word has length 53 [2021-11-07 13:05:03,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:03,105 INFO L470 AbstractCegarLoop]: Abstraction has 5855 states and 8205 transitions. [2021-11-07 13:05:03,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:03,106 INFO L276 IsEmpty]: Start isEmpty. Operand 5855 states and 8205 transitions. [2021-11-07 13:05:03,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 13:05:03,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:03,110 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:03,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 13:05:03,110 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:03,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:03,111 INFO L85 PathProgramCache]: Analyzing trace with hash 836191375, now seen corresponding path program 1 times [2021-11-07 13:05:03,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:03,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524656268] [2021-11-07 13:05:03,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:03,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:03,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:05:03,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:03,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524656268] [2021-11-07 13:05:03,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524656268] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:05:03,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:05:03,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:05:03,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504943772] [2021-11-07 13:05:03,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:03,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:05:03,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:03,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:05:03,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:05:03,202 INFO L87 Difference]: Start difference. First operand 5855 states and 8205 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:03,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:03,446 INFO L93 Difference]: Finished difference Result 15443 states and 21659 transitions. [2021-11-07 13:05:03,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:05:03,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 13:05:03,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:03,480 INFO L225 Difference]: With dead ends: 15443 [2021-11-07 13:05:03,480 INFO L226 Difference]: Without dead ends: 9616 [2021-11-07 13:05:03,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.68ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:05:03,487 INFO L933 BasicCegarLoop]: 1392 mSDtfsCounter, 1011 mSDsluCounter, 1323 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 2715 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.29ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.07ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:03,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1011 Valid, 2715 Invalid, 39 Unknown, 0 Unchecked, 3.29ms Time], IncrementalHoareTripleChecker [6 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 34.07ms Time] [2021-11-07 13:05:03,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9616 states. [2021-11-07 13:05:03,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9616 to 9581. [2021-11-07 13:05:03,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9581 states, 9580 states have (on average 1.4031315240083508) internal successors, (13442), 9580 states have internal predecessors, (13442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:03,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9581 states to 9581 states and 13442 transitions. [2021-11-07 13:05:03,702 INFO L78 Accepts]: Start accepts. Automaton has 9581 states and 13442 transitions. Word has length 57 [2021-11-07 13:05:03,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:03,703 INFO L470 AbstractCegarLoop]: Abstraction has 9581 states and 13442 transitions. [2021-11-07 13:05:03,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:03,703 INFO L276 IsEmpty]: Start isEmpty. Operand 9581 states and 13442 transitions. [2021-11-07 13:05:03,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 13:05:03,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:03,709 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:03,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 13:05:03,710 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:03,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:03,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1796362686, now seen corresponding path program 1 times [2021-11-07 13:05:03,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:03,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067934062] [2021-11-07 13:05:03,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:03,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:03,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 13:05:03,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:03,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067934062] [2021-11-07 13:05:03,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067934062] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:05:03,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:05:03,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:05:03,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771392267] [2021-11-07 13:05:03,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:03,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:05:03,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:03,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:05:03,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:05:03,783 INFO L87 Difference]: Start difference. First operand 9581 states and 13442 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:04,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:04,083 INFO L93 Difference]: Finished difference Result 24423 states and 34142 transitions. [2021-11-07 13:05:04,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:05:04,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 13:05:04,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:04,122 INFO L225 Difference]: With dead ends: 24423 [2021-11-07 13:05:04,123 INFO L226 Difference]: Without dead ends: 14870 [2021-11-07 13:05:04,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.26ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:05:04,136 INFO L933 BasicCegarLoop]: 2297 mSDtfsCounter, 988 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 3630 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.88ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.80ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:04,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [988 Valid, 3630 Invalid, 29 Unknown, 0 Unchecked, 3.88ms Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 28.80ms Time] [2021-11-07 13:05:04,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14870 states. [2021-11-07 13:05:04,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14870 to 14805. [2021-11-07 13:05:04,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14805 states, 14804 states have (on average 1.3943528776006484) internal successors, (20642), 14804 states have internal predecessors, (20642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:04,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14805 states to 14805 states and 20642 transitions. [2021-11-07 13:05:04,504 INFO L78 Accepts]: Start accepts. Automaton has 14805 states and 20642 transitions. Word has length 68 [2021-11-07 13:05:04,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:04,505 INFO L470 AbstractCegarLoop]: Abstraction has 14805 states and 20642 transitions. [2021-11-07 13:05:04,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:04,505 INFO L276 IsEmpty]: Start isEmpty. Operand 14805 states and 20642 transitions. [2021-11-07 13:05:04,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 13:05:04,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:04,510 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:04,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 13:05:04,510 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:04,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:04,511 INFO L85 PathProgramCache]: Analyzing trace with hash 139183937, now seen corresponding path program 1 times [2021-11-07 13:05:04,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:04,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173203774] [2021-11-07 13:05:04,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:04,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:04,541 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 13:05:04,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [962936972] [2021-11-07 13:05:04,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:04,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:05:04,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:05:04,545 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:05:04,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 13:05:04,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:04,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 1077 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 13:05:04,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:05:04,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 13:05:04,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 13:05:04,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:04,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173203774] [2021-11-07 13:05:04,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 13:05:04,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962936972] [2021-11-07 13:05:04,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962936972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:05:04,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:05:04,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 13:05:04,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596098810] [2021-11-07 13:05:04,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:04,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:05:04,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:04,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:05:04,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:05:04,959 INFO L87 Difference]: Start difference. First operand 14805 states and 20642 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:05,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:05,391 INFO L93 Difference]: Finished difference Result 29635 states and 41327 transitions. [2021-11-07 13:05:05,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 13:05:05,392 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 13:05:05,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:05,421 INFO L225 Difference]: With dead ends: 29635 [2021-11-07 13:05:05,422 INFO L226 Difference]: Without dead ends: 14834 [2021-11-07 13:05:05,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.97ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:05:05,444 INFO L933 BasicCegarLoop]: 1394 mSDtfsCounter, 13 mSDsluCounter, 2776 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 4170 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.76ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.86ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:05,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 4170 Invalid, 13 Unknown, 0 Unchecked, 3.76ms Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 50.86ms Time] [2021-11-07 13:05:05,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14834 states. [2021-11-07 13:05:05,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14834 to 14808. [2021-11-07 13:05:05,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14808 states, 14807 states have (on average 1.393732693996083) internal successors, (20637), 14807 states have internal predecessors, (20637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:05,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14808 states to 14808 states and 20637 transitions. [2021-11-07 13:05:05,814 INFO L78 Accepts]: Start accepts. Automaton has 14808 states and 20637 transitions. Word has length 70 [2021-11-07 13:05:05,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:05,816 INFO L470 AbstractCegarLoop]: Abstraction has 14808 states and 20637 transitions. [2021-11-07 13:05:05,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:05,816 INFO L276 IsEmpty]: Start isEmpty. Operand 14808 states and 20637 transitions. [2021-11-07 13:05:05,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 13:05:05,823 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:05,823 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:05,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 13:05:06,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:05:06,060 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:06,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:06,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1015277715, now seen corresponding path program 1 times [2021-11-07 13:05:06,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:06,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296861426] [2021-11-07 13:05:06,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:06,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:06,081 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 13:05:06,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [415754086] [2021-11-07 13:05:06,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:06,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:05:06,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:05:06,113 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:05:06,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 13:05:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:06,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 1094 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 13:05:06,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:05:06,626 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 13:05:06,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 13:05:06,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:06,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296861426] [2021-11-07 13:05:06,627 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 13:05:06,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415754086] [2021-11-07 13:05:06,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415754086] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:05:06,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:05:06,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:05:06,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081089318] [2021-11-07 13:05:06,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:06,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:05:06,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:06,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:05:06,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:05:06,629 INFO L87 Difference]: Start difference. First operand 14808 states and 20637 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:06,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:06,843 INFO L93 Difference]: Finished difference Result 14829 states and 20660 transitions. [2021-11-07 13:05:06,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 13:05:06,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 13:05:06,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:06,869 INFO L225 Difference]: With dead ends: 14829 [2021-11-07 13:05:06,869 INFO L226 Difference]: Without dead ends: 14821 [2021-11-07 13:05:06,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.21ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:05:06,876 INFO L933 BasicCegarLoop]: 1383 mSDtfsCounter, 1351 mSDsluCounter, 1381 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1351 SdHoareTripleChecker+Valid, 2764 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.22ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74.53ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:06,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1351 Valid, 2764 Invalid, 22 Unknown, 0 Unchecked, 3.22ms Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 74.53ms Time] [2021-11-07 13:05:06,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14821 states. [2021-11-07 13:05:07,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14821 to 14809. [2021-11-07 13:05:07,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14809 states, 14808 states have (on average 1.3937061048082118) internal successors, (20638), 14808 states have internal predecessors, (20638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:07,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14809 states to 14809 states and 20638 transitions. [2021-11-07 13:05:07,222 INFO L78 Accepts]: Start accepts. Automaton has 14809 states and 20638 transitions. Word has length 71 [2021-11-07 13:05:07,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:07,223 INFO L470 AbstractCegarLoop]: Abstraction has 14809 states and 20638 transitions. [2021-11-07 13:05:07,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:07,223 INFO L276 IsEmpty]: Start isEmpty. Operand 14809 states and 20638 transitions. [2021-11-07 13:05:07,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 13:05:07,229 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:07,229 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:07,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-07 13:05:07,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:05:07,444 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:07,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:07,444 INFO L85 PathProgramCache]: Analyzing trace with hash -2032495438, now seen corresponding path program 1 times [2021-11-07 13:05:07,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:07,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865811031] [2021-11-07 13:05:07,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:07,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:07,466 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 13:05:07,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969357949] [2021-11-07 13:05:07,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:07,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:05:07,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:05:07,494 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:05:07,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 13:05:07,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:07,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 13:05:07,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:05:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 13:05:07,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:05:08,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 13:05:08,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:08,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865811031] [2021-11-07 13:05:08,137 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 13:05:08,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969357949] [2021-11-07 13:05:08,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969357949] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 13:05:08,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 13:05:08,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-07 13:05:08,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366104503] [2021-11-07 13:05:08,138 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-07 13:05:08,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 13:05:08,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:08,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 13:05:08,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-07 13:05:08,139 INFO L87 Difference]: Start difference. First operand 14809 states and 20638 transitions. Second operand has 8 states, 8 states have (on average 16.375) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:08,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:08,400 INFO L93 Difference]: Finished difference Result 14856 states and 20693 transitions. [2021-11-07 13:05:08,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 13:05:08,400 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 13:05:08,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:08,428 INFO L225 Difference]: With dead ends: 14856 [2021-11-07 13:05:08,428 INFO L226 Difference]: Without dead ends: 14848 [2021-11-07 13:05:08,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 31.80ms TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-11-07 13:05:08,435 INFO L933 BasicCegarLoop]: 1383 mSDtfsCounter, 2828 mSDsluCounter, 1405 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 66.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2828 SdHoareTripleChecker+Valid, 2788 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.00ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 85.55ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:08,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2828 Valid, 2788 Invalid, 41 Unknown, 0 Unchecked, 4.00ms Time], IncrementalHoareTripleChecker [13 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 85.55ms Time] [2021-11-07 13:05:08,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14848 states. [2021-11-07 13:05:08,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14848 to 14848. [2021-11-07 13:05:08,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14848 states, 14847 states have (on average 1.3930760422981074) internal successors, (20683), 14847 states have internal predecessors, (20683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:08,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14848 states to 14848 states and 20683 transitions. [2021-11-07 13:05:08,737 INFO L78 Accepts]: Start accepts. Automaton has 14848 states and 20683 transitions. Word has length 75 [2021-11-07 13:05:08,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:08,738 INFO L470 AbstractCegarLoop]: Abstraction has 14848 states and 20683 transitions. [2021-11-07 13:05:08,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:08,738 INFO L276 IsEmpty]: Start isEmpty. Operand 14848 states and 20683 transitions. [2021-11-07 13:05:08,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 13:05:08,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:08,745 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:08,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 13:05:08,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:05:08,972 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:08,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:08,972 INFO L85 PathProgramCache]: Analyzing trace with hash -594566109, now seen corresponding path program 1 times [2021-11-07 13:05:08,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:08,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204658959] [2021-11-07 13:05:08,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:08,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:08,989 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 13:05:08,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1179644769] [2021-11-07 13:05:08,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:08,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:05:08,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:05:08,991 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:05:08,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 13:05:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:09,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 13:05:09,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:05:09,408 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 13:05:09,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 13:05:09,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:09,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204658959] [2021-11-07 13:05:09,408 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 13:05:09,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179644769] [2021-11-07 13:05:09,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179644769] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:05:09,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:05:09,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:05:09,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786351754] [2021-11-07 13:05:09,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:09,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:05:09,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:09,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:05:09,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:05:09,410 INFO L87 Difference]: Start difference. First operand 14848 states and 20683 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:09,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:09,660 INFO L93 Difference]: Finished difference Result 22182 states and 30929 transitions. [2021-11-07 13:05:09,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:05:09,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 13:05:09,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:09,676 INFO L225 Difference]: With dead ends: 22182 [2021-11-07 13:05:09,677 INFO L226 Difference]: Without dead ends: 7345 [2021-11-07 13:05:09,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.44ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:05:09,697 INFO L933 BasicCegarLoop]: 1409 mSDtfsCounter, 1302 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 98.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1302 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.83ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 110.45ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:09,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1302 Valid, 1481 Invalid, 11 Unknown, 0 Unchecked, 1.83ms Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 110.45ms Time] [2021-11-07 13:05:09,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7345 states. [2021-11-07 13:05:09,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7345 to 7345. [2021-11-07 13:05:09,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7345 states, 7344 states have (on average 1.3917483660130718) internal successors, (10221), 7344 states have internal predecessors, (10221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:09,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7345 states to 7345 states and 10221 transitions. [2021-11-07 13:05:09,914 INFO L78 Accepts]: Start accepts. Automaton has 7345 states and 10221 transitions. Word has length 77 [2021-11-07 13:05:09,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:09,914 INFO L470 AbstractCegarLoop]: Abstraction has 7345 states and 10221 transitions. [2021-11-07 13:05:09,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:09,915 INFO L276 IsEmpty]: Start isEmpty. Operand 7345 states and 10221 transitions. [2021-11-07 13:05:09,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 13:05:09,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:09,921 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:09,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-07 13:05:10,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:05:10,143 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:10,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:10,144 INFO L85 PathProgramCache]: Analyzing trace with hash 376876047, now seen corresponding path program 2 times [2021-11-07 13:05:10,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:10,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780127367] [2021-11-07 13:05:10,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:10,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:10,172 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 13:05:10,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [921887430] [2021-11-07 13:05:10,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 13:05:10,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:05:10,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:05:10,173 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:05:10,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 13:05:10,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 13:05:10,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 13:05:10,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 13:05:10,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:05:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 13:05:10,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:05:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 13:05:11,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:11,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780127367] [2021-11-07 13:05:11,047 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 13:05:11,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921887430] [2021-11-07 13:05:11,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921887430] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 13:05:11,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 13:05:11,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-07 13:05:11,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422402198] [2021-11-07 13:05:11,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-07 13:05:11,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 13:05:11,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:11,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 13:05:11,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2021-11-07 13:05:11,049 INFO L87 Difference]: Start difference. First operand 7345 states and 10221 transitions. Second operand has 14 states, 14 states have (on average 11.071428571428571) internal successors, (155), 13 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:11,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:11,430 INFO L93 Difference]: Finished difference Result 7431 states and 10324 transitions. [2021-11-07 13:05:11,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 13:05:11,431 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.071428571428571) internal successors, (155), 13 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-07 13:05:11,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:11,444 INFO L225 Difference]: With dead ends: 7431 [2021-11-07 13:05:11,444 INFO L226 Difference]: Without dead ends: 7423 [2021-11-07 13:05:11,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 105.42ms TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2021-11-07 13:05:11,447 INFO L933 BasicCegarLoop]: 1380 mSDtfsCounter, 1628 mSDsluCounter, 4206 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 190.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1628 SdHoareTripleChecker+Valid, 5586 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.92ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 221.10ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:11,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1628 Valid, 5586 Invalid, 79 Unknown, 0 Unchecked, 5.92ms Time], IncrementalHoareTripleChecker [17 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 221.10ms Time] [2021-11-07 13:05:11,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7423 states. [2021-11-07 13:05:11,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7423 to 7423. [2021-11-07 13:05:11,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7423 states, 7422 states have (on average 1.389248181083266) internal successors, (10311), 7422 states have internal predecessors, (10311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:11,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7423 states to 7423 states and 10311 transitions. [2021-11-07 13:05:11,602 INFO L78 Accepts]: Start accepts. Automaton has 7423 states and 10311 transitions. Word has length 87 [2021-11-07 13:05:11,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:11,603 INFO L470 AbstractCegarLoop]: Abstraction has 7423 states and 10311 transitions. [2021-11-07 13:05:11,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.071428571428571) internal successors, (155), 13 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:11,603 INFO L276 IsEmpty]: Start isEmpty. Operand 7423 states and 10311 transitions. [2021-11-07 13:05:11,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-07 13:05:11,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:11,614 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:11,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 13:05:11,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:05:11,828 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:11,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:11,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1599385673, now seen corresponding path program 3 times [2021-11-07 13:05:11,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:11,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318138271] [2021-11-07 13:05:11,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:11,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:11,845 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 13:05:11,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081114287] [2021-11-07 13:05:11,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 13:05:11,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:05:11,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:05:11,847 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:05:11,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 13:05:12,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 13:05:12,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 13:05:12,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 13:05:12,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:05:12,399 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-11-07 13:05:12,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 13:05:12,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:12,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318138271] [2021-11-07 13:05:12,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 13:05:12,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081114287] [2021-11-07 13:05:12,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081114287] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:05:12,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:05:12,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 13:05:12,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219225989] [2021-11-07 13:05:12,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:12,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:05:12,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:12,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:05:12,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:05:12,401 INFO L87 Difference]: Start difference. First operand 7423 states and 10311 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:13,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:13,077 INFO L93 Difference]: Finished difference Result 33418 states and 46643 transitions. [2021-11-07 13:05:13,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 13:05:13,078 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-07 13:05:13,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:13,126 INFO L225 Difference]: With dead ends: 33418 [2021-11-07 13:05:13,126 INFO L226 Difference]: Without dead ends: 26072 [2021-11-07 13:05:13,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.39ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:05:13,139 INFO L933 BasicCegarLoop]: 2328 mSDtfsCounter, 3560 mSDsluCounter, 3620 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 81.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3560 SdHoareTripleChecker+Valid, 5948 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.37ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 105.23ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:13,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3560 Valid, 5948 Invalid, 170 Unknown, 0 Unchecked, 8.37ms Time], IncrementalHoareTripleChecker [38 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 105.23ms Time] [2021-11-07 13:05:13,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26072 states. [2021-11-07 13:05:13,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26072 to 7551. [2021-11-07 13:05:13,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7551 states, 7550 states have (on average 1.3826490066225166) internal successors, (10439), 7550 states have internal predecessors, (10439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:13,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7551 states to 7551 states and 10439 transitions. [2021-11-07 13:05:13,411 INFO L78 Accepts]: Start accepts. Automaton has 7551 states and 10439 transitions. Word has length 111 [2021-11-07 13:05:13,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:13,411 INFO L470 AbstractCegarLoop]: Abstraction has 7551 states and 10439 transitions. [2021-11-07 13:05:13,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:13,412 INFO L276 IsEmpty]: Start isEmpty. Operand 7551 states and 10439 transitions. [2021-11-07 13:05:13,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 13:05:13,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:13,422 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:13,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-07 13:05:13,642 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,SelfDestructingSolverStorable11 [2021-11-07 13:05:13,642 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:13,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:13,643 INFO L85 PathProgramCache]: Analyzing trace with hash -187543249, now seen corresponding path program 1 times [2021-11-07 13:05:13,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:13,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166581922] [2021-11-07 13:05:13,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:13,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:13,664 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 13:05:13,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1715038280] [2021-11-07 13:05:13,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:13,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:05:13,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:05:13,666 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:05:13,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 13:05:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:13,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 13:05:13,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:05:14,138 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-07 13:05:14,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 13:05:14,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:14,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166581922] [2021-11-07 13:05:14,139 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 13:05:14,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715038280] [2021-11-07 13:05:14,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715038280] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:05:14,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:05:14,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:05:14,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253113487] [2021-11-07 13:05:14,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:14,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:05:14,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:14,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:05:14,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:05:14,140 INFO L87 Difference]: Start difference. First operand 7551 states and 10439 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:14,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:14,398 INFO L93 Difference]: Finished difference Result 17528 states and 24392 transitions. [2021-11-07 13:05:14,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:05:14,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-07 13:05:14,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:14,414 INFO L225 Difference]: With dead ends: 17528 [2021-11-07 13:05:14,415 INFO L226 Difference]: Without dead ends: 10054 [2021-11-07 13:05:14,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.74ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:05:14,424 INFO L933 BasicCegarLoop]: 1370 mSDtfsCounter, 1097 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1097 SdHoareTripleChecker+Valid, 2439 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.93ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.89ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:14,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1097 Valid, 2439 Invalid, 65 Unknown, 0 Unchecked, 1.93ms Time], IncrementalHoareTripleChecker [20 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 52.89ms Time] [2021-11-07 13:05:14,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10054 states. [2021-11-07 13:05:14,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10054 to 9915. [2021-11-07 13:05:14,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9915 states, 9914 states have (on average 1.3960056485777688) internal successors, (13840), 9914 states have internal predecessors, (13840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:14,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9915 states to 9915 states and 13840 transitions. [2021-11-07 13:05:14,674 INFO L78 Accepts]: Start accepts. Automaton has 9915 states and 13840 transitions. Word has length 113 [2021-11-07 13:05:14,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:14,674 INFO L470 AbstractCegarLoop]: Abstraction has 9915 states and 13840 transitions. [2021-11-07 13:05:14,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:14,674 INFO L276 IsEmpty]: Start isEmpty. Operand 9915 states and 13840 transitions. [2021-11-07 13:05:14,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 13:05:14,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:14,687 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:14,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 13:05:14,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-07 13:05:14,905 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:14,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:14,906 INFO L85 PathProgramCache]: Analyzing trace with hash 2055927863, now seen corresponding path program 1 times [2021-11-07 13:05:14,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:14,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221364624] [2021-11-07 13:05:14,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:14,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:14,929 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 13:05:14,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1912231879] [2021-11-07 13:05:14,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:14,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:05:14,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:05:14,931 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:05:14,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 13:05:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:15,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 13:05:15,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:05:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-11-07 13:05:15,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 13:05:15,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:15,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221364624] [2021-11-07 13:05:15,394 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 13:05:15,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912231879] [2021-11-07 13:05:15,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912231879] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:05:15,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:05:15,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:05:15,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740060845] [2021-11-07 13:05:15,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:15,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:05:15,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:15,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:05:15,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:05:15,396 INFO L87 Difference]: Start difference. First operand 9915 states and 13840 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:15,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:15,878 INFO L93 Difference]: Finished difference Result 23706 states and 33135 transitions. [2021-11-07 13:05:15,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:05:15,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-07 13:05:15,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:15,905 INFO L225 Difference]: With dead ends: 23706 [2021-11-07 13:05:15,906 INFO L226 Difference]: Without dead ends: 18533 [2021-11-07 13:05:15,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.65ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:05:15,917 INFO L933 BasicCegarLoop]: 2405 mSDtfsCounter, 1165 mSDsluCounter, 1219 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1165 SdHoareTripleChecker+Valid, 3624 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.62ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.28ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:15,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1165 Valid, 3624 Invalid, 112 Unknown, 0 Unchecked, 2.62ms Time], IncrementalHoareTripleChecker [55 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 77.28ms Time] [2021-11-07 13:05:15,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18533 states. [2021-11-07 13:05:16,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18533 to 10091. [2021-11-07 13:05:16,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10091 states, 10090 states have (on average 1.3890981169474728) internal successors, (14016), 10090 states have internal predecessors, (14016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:16,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10091 states to 10091 states and 14016 transitions. [2021-11-07 13:05:16,226 INFO L78 Accepts]: Start accepts. Automaton has 10091 states and 14016 transitions. Word has length 113 [2021-11-07 13:05:16,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:16,227 INFO L470 AbstractCegarLoop]: Abstraction has 10091 states and 14016 transitions. [2021-11-07 13:05:16,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:16,227 INFO L276 IsEmpty]: Start isEmpty. Operand 10091 states and 14016 transitions. [2021-11-07 13:05:16,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-07 13:05:16,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:16,239 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:16,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 13:05:16,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 13:05:16,458 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:16,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:16,460 INFO L85 PathProgramCache]: Analyzing trace with hash 2070033409, now seen corresponding path program 1 times [2021-11-07 13:05:16,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:16,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706009974] [2021-11-07 13:05:16,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:16,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:16,502 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 13:05:16,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105569173] [2021-11-07 13:05:16,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:16,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:05:16,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:05:16,512 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:05:16,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 13:05:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:16,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 1217 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 13:05:16,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:05:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 13:05:17,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:05:17,502 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 13:05:17,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:17,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706009974] [2021-11-07 13:05:17,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 13:05:17,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105569173] [2021-11-07 13:05:17,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105569173] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 13:05:17,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 13:05:17,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-11-07 13:05:17,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909097525] [2021-11-07 13:05:17,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-07 13:05:17,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 13:05:17,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:17,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 13:05:17,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2021-11-07 13:05:17,504 INFO L87 Difference]: Start difference. First operand 10091 states and 14016 transitions. Second operand has 26 states, 26 states have (on average 8.038461538461538) internal successors, (209), 25 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:18,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:18,095 INFO L93 Difference]: Finished difference Result 10255 states and 14215 transitions. [2021-11-07 13:05:18,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 13:05:18,096 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 8.038461538461538) internal successors, (209), 25 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-07 13:05:18,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:18,108 INFO L225 Difference]: With dead ends: 10255 [2021-11-07 13:05:18,108 INFO L226 Difference]: Without dead ends: 10247 [2021-11-07 13:05:18,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 340.04ms TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 13:05:18,113 INFO L933 BasicCegarLoop]: 1380 mSDtfsCounter, 2801 mSDsluCounter, 1618 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 125.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2801 SdHoareTripleChecker+Valid, 2998 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.11ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 150.96ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:18,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2801 Valid, 2998 Invalid, 121 Unknown, 0 Unchecked, 3.11ms Time], IncrementalHoareTripleChecker [39 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 150.96ms Time] [2021-11-07 13:05:18,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10247 states. [2021-11-07 13:05:18,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10247 to 10247. [2021-11-07 13:05:18,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10247 states, 10246 states have (on average 1.3855162990435292) internal successors, (14196), 10246 states have internal predecessors, (14196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:18,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10247 states to 10247 states and 14196 transitions. [2021-11-07 13:05:18,376 INFO L78 Accepts]: Start accepts. Automaton has 10247 states and 14196 transitions. Word has length 114 [2021-11-07 13:05:18,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:18,376 INFO L470 AbstractCegarLoop]: Abstraction has 10247 states and 14196 transitions. [2021-11-07 13:05:18,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.038461538461538) internal successors, (209), 25 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:18,377 INFO L276 IsEmpty]: Start isEmpty. Operand 10247 states and 14196 transitions. [2021-11-07 13:05:18,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-07 13:05:18,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:18,393 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:18,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-07 13:05:18,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 13:05:18,607 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:18,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:18,608 INFO L85 PathProgramCache]: Analyzing trace with hash 93143669, now seen corresponding path program 2 times [2021-11-07 13:05:18,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:18,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792462161] [2021-11-07 13:05:18,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:18,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:18,627 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 13:05:18,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151101975] [2021-11-07 13:05:18,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 13:05:18,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:05:18,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:05:18,630 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:05:18,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 13:05:19,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 13:05:19,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 13:05:19,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 1325 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 13:05:19,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:05:19,802 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 13:05:19,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:05:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 13:05:20,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:20,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792462161] [2021-11-07 13:05:20,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 13:05:20,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151101975] [2021-11-07 13:05:20,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151101975] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 13:05:20,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 13:05:20,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2021-11-07 13:05:20,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654875846] [2021-11-07 13:05:20,607 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-07 13:05:20,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-07 13:05:20,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:20,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-07 13:05:20,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 13:05:20,609 INFO L87 Difference]: Start difference. First operand 10247 states and 14196 transitions. Second operand has 50 states, 50 states have (on average 6.1) internal successors, (305), 49 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:22,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:22,369 INFO L93 Difference]: Finished difference Result 10567 states and 14587 transitions. [2021-11-07 13:05:22,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-07 13:05:22,369 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 6.1) internal successors, (305), 49 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2021-11-07 13:05:22,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:22,382 INFO L225 Difference]: With dead ends: 10567 [2021-11-07 13:05:22,383 INFO L226 Difference]: Without dead ends: 10559 [2021-11-07 13:05:22,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1337.62ms TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2021-11-07 13:05:22,389 INFO L933 BasicCegarLoop]: 1380 mSDtfsCounter, 3547 mSDsluCounter, 6004 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 372.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3547 SdHoareTripleChecker+Valid, 7384 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.97ms SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 458.11ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:22,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3547 Valid, 7384 Invalid, 252 Unknown, 0 Unchecked, 6.97ms Time], IncrementalHoareTripleChecker [74 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 458.11ms Time] [2021-11-07 13:05:22,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10559 states. [2021-11-07 13:05:22,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10559 to 10559. [2021-11-07 13:05:22,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10559 states, 10558 states have (on average 1.3786702026899034) internal successors, (14556), 10558 states have internal predecessors, (14556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:22,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10559 states to 10559 states and 14556 transitions. [2021-11-07 13:05:22,752 INFO L78 Accepts]: Start accepts. Automaton has 10559 states and 14556 transitions. Word has length 162 [2021-11-07 13:05:22,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:22,752 INFO L470 AbstractCegarLoop]: Abstraction has 10559 states and 14556 transitions. [2021-11-07 13:05:22,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 6.1) internal successors, (305), 49 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:22,752 INFO L276 IsEmpty]: Start isEmpty. Operand 10559 states and 14556 transitions. [2021-11-07 13:05:22,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-07 13:05:22,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:22,765 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:22,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-07 13:05:22,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 13:05:22,979 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:22,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:22,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1467697315, now seen corresponding path program 3 times [2021-11-07 13:05:22,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:22,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765540074] [2021-11-07 13:05:22,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:22,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:23,000 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 13:05:23,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [238669602] [2021-11-07 13:05:23,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 13:05:23,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:05:23,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:05:23,002 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:05:23,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 13:05:23,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 13:05:23,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 13:05:23,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-07 13:05:23,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:05:23,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4189 trivial. 0 not checked. [2021-11-07 13:05:23,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 13:05:23,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:23,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765540074] [2021-11-07 13:05:23,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 13:05:23,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238669602] [2021-11-07 13:05:23,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238669602] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:05:23,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:05:23,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-07 13:05:23,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899186645] [2021-11-07 13:05:23,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:23,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 13:05:23,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:23,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 13:05:23,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-07 13:05:23,925 INFO L87 Difference]: Start difference. First operand 10559 states and 14556 transitions. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:28,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:28,981 INFO L93 Difference]: Finished difference Result 113232 states and 158515 transitions. [2021-11-07 13:05:28,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 13:05:28,982 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 258 [2021-11-07 13:05:28,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:29,157 INFO L225 Difference]: With dead ends: 113232 [2021-11-07 13:05:29,158 INFO L226 Difference]: Without dead ends: 102750 [2021-11-07 13:05:29,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 526.34ms TimeCoverageRelationStatistics Valid=236, Invalid=634, Unknown=0, NotChecked=0, Total=870 [2021-11-07 13:05:29,188 INFO L933 BasicCegarLoop]: 6766 mSDtfsCounter, 14248 mSDsluCounter, 31319 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 734.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14248 SdHoareTripleChecker+Valid, 38085 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 39.45ms SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 943.37ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:29,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14248 Valid, 38085 Invalid, 1144 Unknown, 0 Unchecked, 39.45ms Time], IncrementalHoareTripleChecker [87 Valid, 1057 Invalid, 0 Unknown, 0 Unchecked, 943.37ms Time] [2021-11-07 13:05:29,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102750 states. [2021-11-07 13:05:30,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102750 to 10655. [2021-11-07 13:05:30,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10655 states, 10654 states have (on average 1.3688755397033978) internal successors, (14584), 10654 states have internal predecessors, (14584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:30,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10655 states to 10655 states and 14584 transitions. [2021-11-07 13:05:30,376 INFO L78 Accepts]: Start accepts. Automaton has 10655 states and 14584 transitions. Word has length 258 [2021-11-07 13:05:30,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:30,376 INFO L470 AbstractCegarLoop]: Abstraction has 10655 states and 14584 transitions. [2021-11-07 13:05:30,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:30,376 INFO L276 IsEmpty]: Start isEmpty. Operand 10655 states and 14584 transitions. [2021-11-07 13:05:30,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-07 13:05:30,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:30,387 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:30,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-07 13:05:30,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 13:05:30,606 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:30,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:30,606 INFO L85 PathProgramCache]: Analyzing trace with hash 452496466, now seen corresponding path program 1 times [2021-11-07 13:05:30,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:30,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66776854] [2021-11-07 13:05:30,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:30,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:30,645 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 13:05:30,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033835340] [2021-11-07 13:05:30,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:30,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:05:30,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:05:30,664 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:05:30,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 13:05:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:31,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 1501 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 13:05:31,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:05:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4189 trivial. 0 not checked. [2021-11-07 13:05:31,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 13:05:31,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:31,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66776854] [2021-11-07 13:05:31,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 13:05:31,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033835340] [2021-11-07 13:05:31,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033835340] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:05:31,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:05:31,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 13:05:31,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063419465] [2021-11-07 13:05:31,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:31,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:05:31,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:31,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:05:31,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:05:31,421 INFO L87 Difference]: Start difference. First operand 10655 states and 14584 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:32,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:32,757 INFO L93 Difference]: Finished difference Result 25078 states and 34317 transitions. [2021-11-07 13:05:32,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 13:05:32,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 259 [2021-11-07 13:05:32,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:32,779 INFO L225 Difference]: With dead ends: 25078 [2021-11-07 13:05:32,780 INFO L226 Difference]: Without dead ends: 14018 [2021-11-07 13:05:32,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.69ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:05:32,799 INFO L933 BasicCegarLoop]: 2333 mSDtfsCounter, 2195 mSDsluCounter, 2220 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 237.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2195 SdHoareTripleChecker+Valid, 4553 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.78ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 318.19ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:32,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2195 Valid, 4553 Invalid, 258 Unknown, 0 Unchecked, 4.78ms Time], IncrementalHoareTripleChecker [37 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 318.19ms Time] [2021-11-07 13:05:32,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14018 states. [2021-11-07 13:05:33,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14018 to 10142. [2021-11-07 13:05:33,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10142 states, 10141 states have (on average 1.3520362883344839) internal successors, (13711), 10141 states have internal predecessors, (13711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:33,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10142 states to 10142 states and 13711 transitions. [2021-11-07 13:05:33,456 INFO L78 Accepts]: Start accepts. Automaton has 10142 states and 13711 transitions. Word has length 259 [2021-11-07 13:05:33,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:33,456 INFO L470 AbstractCegarLoop]: Abstraction has 10142 states and 13711 transitions. [2021-11-07 13:05:33,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:33,456 INFO L276 IsEmpty]: Start isEmpty. Operand 10142 states and 13711 transitions. [2021-11-07 13:05:33,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-07 13:05:33,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:33,468 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:33,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 13:05:33,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:05:33,684 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:33,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:33,684 INFO L85 PathProgramCache]: Analyzing trace with hash -358267325, now seen corresponding path program 1 times [2021-11-07 13:05:33,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:33,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923396640] [2021-11-07 13:05:33,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:33,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:33,703 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 13:05:33,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281896412] [2021-11-07 13:05:33,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:33,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:05:33,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:05:33,705 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:05:33,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 13:05:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:34,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 1551 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-07 13:05:34,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:05:35,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 13:05:35,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:05:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 13:05:39,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:39,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923396640] [2021-11-07 13:05:39,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 13:05:39,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281896412] [2021-11-07 13:05:39,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281896412] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 13:05:39,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 13:05:39,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2021-11-07 13:05:39,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014006090] [2021-11-07 13:05:39,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-07 13:05:39,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-07 13:05:39,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:39,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-07 13:05:39,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2021-11-07 13:05:39,063 INFO L87 Difference]: Start difference. First operand 10142 states and 13711 transitions. Second operand has 98 states, 98 states have (on average 5.173469387755102) internal successors, (507), 97 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:47,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:47,073 INFO L93 Difference]: Finished difference Result 10774 states and 14486 transitions. [2021-11-07 13:05:47,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-07 13:05:47,074 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 5.173469387755102) internal successors, (507), 97 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2021-11-07 13:05:47,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:47,086 INFO L225 Difference]: With dead ends: 10774 [2021-11-07 13:05:47,086 INFO L226 Difference]: Without dead ends: 10766 [2021-11-07 13:05:47,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 7689.14ms TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2021-11-07 13:05:47,098 INFO L933 BasicCegarLoop]: 1380 mSDtfsCounter, 9626 mSDsluCounter, 5214 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 672.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9626 SdHoareTripleChecker+Valid, 6594 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.32ms SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 910.13ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:47,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9626 Valid, 6594 Invalid, 558 Unknown, 0 Unchecked, 12.32ms Time], IncrementalHoareTripleChecker [244 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 910.13ms Time] [2021-11-07 13:05:47,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10766 states. [2021-11-07 13:05:47,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10766 to 10766. [2021-11-07 13:05:47,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10766 states, 10765 states have (on average 1.3405480724570367) internal successors, (14431), 10765 states have internal predecessors, (14431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:47,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10766 states to 10766 states and 14431 transitions. [2021-11-07 13:05:47,711 INFO L78 Accepts]: Start accepts. Automaton has 10766 states and 14431 transitions. Word has length 263 [2021-11-07 13:05:47,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:47,713 INFO L470 AbstractCegarLoop]: Abstraction has 10766 states and 14431 transitions. [2021-11-07 13:05:47,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 5.173469387755102) internal successors, (507), 97 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:05:47,713 INFO L276 IsEmpty]: Start isEmpty. Operand 10766 states and 14431 transitions. [2021-11-07 13:05:47,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2021-11-07 13:05:47,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:47,737 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:47,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 13:05:47,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:05:47,957 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:47,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:47,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1947926547, now seen corresponding path program 2 times [2021-11-07 13:05:47,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:47,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111659492] [2021-11-07 13:05:47,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:47,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:47,977 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 13:05:47,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638650296] [2021-11-07 13:05:47,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 13:05:47,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:05:47,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:05:47,978 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:05:47,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 13:05:48,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 13:05:48,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 13:05:48,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 1983 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-07 13:05:48,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:05:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 17589 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 13:05:51,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:06:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 17589 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 13:06:12,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:06:12,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111659492] [2021-11-07 13:06:12,503 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 13:06:12,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638650296] [2021-11-07 13:06:12,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638650296] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 13:06:12,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 13:06:12,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 193 [2021-11-07 13:06:12,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185566772] [2021-11-07 13:06:12,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-07 13:06:12,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2021-11-07 13:06:12,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:06:12,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2021-11-07 13:06:12,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18531, Invalid=18911, Unknown=0, NotChecked=0, Total=37442 [2021-11-07 13:06:12,521 INFO L87 Difference]: Start difference. First operand 10766 states and 14431 transitions. Second operand has 194 states, 194 states have (on average 4.592783505154639) internal successors, (891), 193 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:07:59,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:07:59,690 INFO L93 Difference]: Finished difference Result 12022 states and 15974 transitions. [2021-11-07 13:07:59,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-11-07 13:07:59,695 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 4.592783505154639) internal successors, (891), 193 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 455 [2021-11-07 13:07:59,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:07:59,708 INFO L225 Difference]: With dead ends: 12022 [2021-11-07 13:07:59,708 INFO L226 Difference]: Without dead ends: 12014 [2021-11-07 13:07:59,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1003 GetRequests, 716 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18145 ImplicationChecksByTransitivity, 96388.45ms TimeCoverageRelationStatistics Valid=36961, Invalid=46271, Unknown=0, NotChecked=0, Total=83232 [2021-11-07 13:07:59,722 INFO L933 BasicCegarLoop]: 1380 mSDtfsCounter, 18049 mSDsluCounter, 7732 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2601.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18049 SdHoareTripleChecker+Valid, 9112 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 36.63ms SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3665.59ms IncrementalHoareTripleChecker+Time [2021-11-07 13:07:59,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18049 Valid, 9112 Invalid, 1092 Unknown, 0 Unchecked, 36.63ms Time], IncrementalHoareTripleChecker [482 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 3665.59ms Time] [2021-11-07 13:07:59,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12014 states. [2021-11-07 13:08:00,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12014 to 12014. [2021-11-07 13:08:00,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12014 states, 12013 states have (on average 1.321152085240989) internal successors, (15871), 12013 states have internal predecessors, (15871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:08:00,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12014 states to 12014 states and 15871 transitions. [2021-11-07 13:08:00,474 INFO L78 Accepts]: Start accepts. Automaton has 12014 states and 15871 transitions. Word has length 455 [2021-11-07 13:08:00,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:08:00,475 INFO L470 AbstractCegarLoop]: Abstraction has 12014 states and 15871 transitions. [2021-11-07 13:08:00,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 4.592783505154639) internal successors, (891), 193 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:08:00,475 INFO L276 IsEmpty]: Start isEmpty. Operand 12014 states and 15871 transitions. [2021-11-07 13:08:00,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2021-11-07 13:08:00,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:08:00,505 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 190, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:08:00,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 13:08:00,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:08:00,706 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:08:00,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:08:00,706 INFO L85 PathProgramCache]: Analyzing trace with hash 446428083, now seen corresponding path program 3 times [2021-11-07 13:08:00,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:08:00,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948814226] [2021-11-07 13:08:00,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:08:00,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:08:00,743 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 13:08:00,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [17063432] [2021-11-07 13:08:00,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 13:08:00,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:08:00,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:08:00,745 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:08:00,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 13:08:01,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 13:08:01,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 13:08:01,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-07 13:08:01,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:08:02,078 INFO L134 CoverageAnalysis]: Checked inductivity of 72021 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 72013 trivial. 0 not checked. [2021-11-07 13:08:02,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 13:08:02,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:08:02,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948814226] [2021-11-07 13:08:02,091 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 13:08:02,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17063432] [2021-11-07 13:08:02,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17063432] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:08:02,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:08:02,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 13:08:02,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968476486] [2021-11-07 13:08:02,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:08:02,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 13:08:02,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:08:02,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 13:08:02,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-07 13:08:02,093 INFO L87 Difference]: Start difference. First operand 12014 states and 15871 transitions. Second operand has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:08:14,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:08:14,078 INFO L93 Difference]: Finished difference Result 132411 states and 177582 transitions. [2021-11-07 13:08:14,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 13:08:14,078 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 839 [2021-11-07 13:08:14,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:08:14,283 INFO L225 Difference]: With dead ends: 132411 [2021-11-07 13:08:14,283 INFO L226 Difference]: Without dead ends: 120474 [2021-11-07 13:08:14,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 873 GetRequests, 840 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 661.96ms TimeCoverageRelationStatistics Valid=320, Invalid=870, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 13:08:14,325 INFO L933 BasicCegarLoop]: 5141 mSDtfsCounter, 18472 mSDsluCounter, 33159 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1208.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18472 SdHoareTripleChecker+Valid, 38300 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 41.52ms SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1668.87ms IncrementalHoareTripleChecker+Time [2021-11-07 13:08:14,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18472 Valid, 38300 Invalid, 1244 Unknown, 0 Unchecked, 41.52ms Time], IncrementalHoareTripleChecker [89 Valid, 1155 Invalid, 0 Unknown, 0 Unchecked, 1668.87ms Time] [2021-11-07 13:08:14,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120474 states. [2021-11-07 13:08:16,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120474 to 12086. [2021-11-07 13:08:16,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12086 states, 12085 states have (on average 1.3192387256930078) internal successors, (15943), 12085 states have internal predecessors, (15943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:08:16,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12086 states to 12086 states and 15943 transitions. [2021-11-07 13:08:16,246 INFO L78 Accepts]: Start accepts. Automaton has 12086 states and 15943 transitions. Word has length 839 [2021-11-07 13:08:16,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:08:16,246 INFO L470 AbstractCegarLoop]: Abstraction has 12086 states and 15943 transitions. [2021-11-07 13:08:16,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:08:16,247 INFO L276 IsEmpty]: Start isEmpty. Operand 12086 states and 15943 transitions. [2021-11-07 13:08:16,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 844 [2021-11-07 13:08:16,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:08:16,265 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 190, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:08:16,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 13:08:16,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:08:16,479 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:08:16,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:08:16,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1798764112, now seen corresponding path program 1 times [2021-11-07 13:08:16,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:08:16,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33338625] [2021-11-07 13:08:16,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:08:16,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:08:16,509 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 13:08:16,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [870071428] [2021-11-07 13:08:16,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:08:16,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:08:16,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:08:16,511 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:08:16,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 13:08:17,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:08:17,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 2955 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 13:08:17,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:08:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 72021 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 72013 trivial. 0 not checked. [2021-11-07 13:08:18,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 13:08:18,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:08:18,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33338625] [2021-11-07 13:08:18,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 13:08:18,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870071428] [2021-11-07 13:08:18,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870071428] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:08:18,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:08:18,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 13:08:18,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093069179] [2021-11-07 13:08:18,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:08:18,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 13:08:18,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:08:18,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 13:08:18,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:08:18,045 INFO L87 Difference]: Start difference. First operand 12086 states and 15943 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:08:25,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:08:25,235 INFO L93 Difference]: Finished difference Result 42386 states and 55603 transitions. [2021-11-07 13:08:25,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 13:08:25,236 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 843 [2021-11-07 13:08:25,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:08:25,279 INFO L225 Difference]: With dead ends: 42386 [2021-11-07 13:08:25,279 INFO L226 Difference]: Without dead ends: 34701 [2021-11-07 13:08:25,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 842 GetRequests, 839 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.87ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:08:25,293 INFO L933 BasicCegarLoop]: 2374 mSDtfsCounter, 4792 mSDsluCounter, 3528 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1954.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4792 SdHoareTripleChecker+Valid, 5902 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.14ms SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2902.40ms IncrementalHoareTripleChecker+Time [2021-11-07 13:08:25,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4792 Valid, 5902 Invalid, 803 Unknown, 0 Unchecked, 9.14ms Time], IncrementalHoareTripleChecker [117 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 2902.40ms Time] [2021-11-07 13:08:25,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34701 states. [2021-11-07 13:08:27,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34701 to 21977. [2021-11-07 13:08:27,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21977 states, 21976 states have (on average 1.3446942118674918) internal successors, (29551), 21976 states have internal predecessors, (29551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:08:27,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21977 states to 21977 states and 29551 transitions. [2021-11-07 13:08:27,454 INFO L78 Accepts]: Start accepts. Automaton has 21977 states and 29551 transitions. Word has length 843 [2021-11-07 13:08:27,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:08:27,455 INFO L470 AbstractCegarLoop]: Abstraction has 21977 states and 29551 transitions. [2021-11-07 13:08:27,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:08:27,455 INFO L276 IsEmpty]: Start isEmpty. Operand 21977 states and 29551 transitions. [2021-11-07 13:08:27,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2021-11-07 13:08:27,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:08:27,481 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 190, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:08:27,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 13:08:27,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:08:27,690 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:08:27,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:08:27,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1171732177, now seen corresponding path program 1 times [2021-11-07 13:08:27,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:08:27,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697500649] [2021-11-07 13:08:27,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:08:27,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:08:27,721 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 13:08:27,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160722552] [2021-11-07 13:08:27,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:08:27,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:08:27,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:08:27,723 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:08:27,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 13:08:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:08:28,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 2963 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 13:08:28,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:08:29,223 INFO L134 CoverageAnalysis]: Checked inductivity of 72021 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 72013 trivial. 0 not checked. [2021-11-07 13:08:29,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 13:08:29,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:08:29,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697500649] [2021-11-07 13:08:29,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 13:08:29,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160722552] [2021-11-07 13:08:29,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160722552] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:08:29,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:08:29,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 13:08:29,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148392666] [2021-11-07 13:08:29,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:08:29,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:08:29,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:08:29,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:08:29,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:08:29,228 INFO L87 Difference]: Start difference. First operand 21977 states and 29551 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:08:35,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:08:35,537 INFO L93 Difference]: Finished difference Result 65094 states and 87362 transitions. [2021-11-07 13:08:35,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 13:08:35,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 845 [2021-11-07 13:08:35,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:08:35,607 INFO L225 Difference]: With dead ends: 65094 [2021-11-07 13:08:35,607 INFO L226 Difference]: Without dead ends: 47518 [2021-11-07 13:08:35,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 846 GetRequests, 843 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.00ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:08:35,626 INFO L933 BasicCegarLoop]: 3294 mSDtfsCounter, 2369 mSDsluCounter, 3214 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 745.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2369 SdHoareTripleChecker+Valid, 6508 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.38ms SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1094.28ms IncrementalHoareTripleChecker+Time [2021-11-07 13:08:35,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2369 Valid, 6508 Invalid, 472 Unknown, 0 Unchecked, 6.38ms Time], IncrementalHoareTripleChecker [149 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 1094.28ms Time] [2021-11-07 13:08:35,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47518 states. [2021-11-07 13:08:38,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47518 to 21889. [2021-11-07 13:08:38,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21889 states, 21888 states have (on average 1.3342013888888888) internal successors, (29203), 21888 states have internal predecessors, (29203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:08:38,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21889 states to 21889 states and 29203 transitions. [2021-11-07 13:08:38,093 INFO L78 Accepts]: Start accepts. Automaton has 21889 states and 29203 transitions. Word has length 845 [2021-11-07 13:08:38,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:08:38,094 INFO L470 AbstractCegarLoop]: Abstraction has 21889 states and 29203 transitions. [2021-11-07 13:08:38,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:08:38,094 INFO L276 IsEmpty]: Start isEmpty. Operand 21889 states and 29203 transitions. [2021-11-07 13:08:38,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 848 [2021-11-07 13:08:38,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:08:38,121 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 190, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:08:38,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 13:08:38,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:08:38,332 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:08:38,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:08:38,332 INFO L85 PathProgramCache]: Analyzing trace with hash -301308712, now seen corresponding path program 1 times [2021-11-07 13:08:38,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:08:38,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626434209] [2021-11-07 13:08:38,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:08:38,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:08:38,355 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 13:08:38,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247996752] [2021-11-07 13:08:38,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:08:38,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:08:38,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:08:38,357 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:08:38,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 13:08:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:08:38,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 2964 conjuncts, 193 conjunts are in the unsatisfiable core [2021-11-07 13:08:38,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:08:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 72023 backedges. 0 proven. 72010 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 13:08:49,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... Killed by 15