./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 fcb8e130 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-dev-fcb8e13 [2021-11-22 23:12:08,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 23:12:08,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 23:12:08,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 23:12:08,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 23:12:08,756 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 23:12:08,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 23:12:08,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 23:12:08,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 23:12:08,770 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 23:12:08,771 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 23:12:08,772 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 23:12:08,772 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 23:12:08,774 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 23:12:08,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 23:12:08,780 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 23:12:08,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 23:12:08,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 23:12:08,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 23:12:08,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 23:12:08,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 23:12:08,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 23:12:08,792 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 23:12:08,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 23:12:08,795 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 23:12:08,796 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 23:12:08,796 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 23:12:08,798 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 23:12:08,798 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 23:12:08,799 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 23:12:08,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 23:12:08,800 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 23:12:08,801 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 23:12:08,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 23:12:08,803 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 23:12:08,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 23:12:08,803 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 23:12:08,804 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 23:12:08,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 23:12:08,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 23:12:08,805 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 23:12:08,805 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-22 23:12:08,833 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 23:12:08,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 23:12:08,836 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 23:12:08,836 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 23:12:08,837 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 23:12:08,837 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 23:12:08,837 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 23:12:08,838 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 23:12:08,838 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 23:12:08,838 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 23:12:08,839 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 23:12:08,839 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 23:12:08,839 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 23:12:08,839 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 23:12:08,839 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 23:12:08,839 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 23:12:08,839 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 23:12:08,840 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 23:12:08,840 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 23:12:08,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 23:12:08,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 23:12:08,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 23:12:08,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 23:12:08,840 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 23:12:08,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 23:12:08,841 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 23:12:08,841 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 23:12:08,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 23:12:08,841 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 23:12:08,841 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cccbd170603672b3f74a5336cc730c4afa341837cef68e5226707c3c82e670c [2021-11-22 23:12:09,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 23:12:09,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 23:12:09,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 23:12:09,089 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 23:12:09,092 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 23:12:09,093 INFO L432 ainManager$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 [2021-11-22 23:12:09,153 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/517b40d75/457eb10196974e80a6f6cdaffcbf7574/FLAGbc63d0b2e [2021-11-22 23:12:09,820 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 23:12:09,821 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 [2021-11-22 23:12:09,860 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/517b40d75/457eb10196974e80a6f6cdaffcbf7574/FLAGbc63d0b2e [2021-11-22 23:12:10,141 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/517b40d75/457eb10196974e80a6f6cdaffcbf7574 [2021-11-22 23:12:10,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 23:12:10,145 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 23:12:10,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 23:12:10,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 23:12:10,148 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 23:12:10,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 11:12:10" (1/1) ... [2021-11-22 23:12:10,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c8e3b73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:12:10, skipping insertion in model container [2021-11-22 23:12:10,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 11:12:10" (1/1) ... [2021-11-22 23:12:10,154 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 23:12:10,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 23:12:10,779 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/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] [2021-11-22 23:12:11,163 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 23:12:11,178 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 23:12:11,283 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/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] [2021-11-22 23:12:11,380 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 23:12:11,431 INFO L208 MainTranslator]: Completed translation [2021-11-22 23:12:11,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:12:11 WrapperNode [2021-11-22 23:12:11,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 23:12:11,434 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 23:12:11,434 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 23:12:11,434 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 23:12:11,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:12:11" (1/1) ... [2021-11-22 23:12:11,482 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:12:11" (1/1) ... [2021-11-22 23:12:11,617 INFO L137 Inliner]: procedures = 181, calls = 601, calls flagged for inlining = 251, calls inlined = 501, statements flattened = 5751 [2021-11-22 23:12:11,619 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 23:12:11,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 23:12:11,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 23:12:11,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 23:12:11,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:12:11" (1/1) ... [2021-11-22 23:12:11,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:12:11" (1/1) ... [2021-11-22 23:12:11,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:12:11" (1/1) ... [2021-11-22 23:12:11,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:12:11" (1/1) ... [2021-11-22 23:12:11,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:12:11" (1/1) ... [2021-11-22 23:12:11,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:12:11" (1/1) ... [2021-11-22 23:12:11,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:12:11" (1/1) ... [2021-11-22 23:12:11,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 23:12:11,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 23:12:11,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 23:12:11,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 23:12:11,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:12:11" (1/1) ... [2021-11-22 23:12:11,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 23:12:11,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 23:12:11,862 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) [2021-11-22 23:12:11,888 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 [2021-11-22 23:12:11,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-22 23:12:11,900 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-22 23:12:11,900 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-22 23:12:11,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-22 23:12:11,900 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 23:12:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-22 23:12:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-22 23:12:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 23:12:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 23:12:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-22 23:12:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-22 23:12:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 23:12:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-22 23:12:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 23:12:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-22 23:12:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 23:12:11,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 23:12:12,370 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 23:12:12,371 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 23:12:14,275 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 23:12:14,288 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 23:12:14,289 INFO L301 CfgBuilder]: Removed 46 assume(true) statements. [2021-11-22 23:12:14,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 11:12:14 BoogieIcfgContainer [2021-11-22 23:12:14,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 23:12:14,293 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 23:12:14,293 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 23:12:14,295 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 23:12:14,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 11:12:10" (1/3) ... [2021-11-22 23:12:14,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c68ecb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 11:12:14, skipping insertion in model container [2021-11-22 23:12:14,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:12:11" (2/3) ... [2021-11-22 23:12:14,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c68ecb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 11:12:14, skipping insertion in model container [2021-11-22 23:12:14,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 11:12:14" (3/3) ... [2021-11-22 23:12:14,298 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 [2021-11-22 23:12:14,301 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 23:12:14,301 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 23:12:14,337 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 23:12:14,341 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 [2021-11-22 23:12:14,341 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 23:12:14,417 INFO L276 IsEmpty]: Start isEmpty. Operand has 1105 states, 1103 states have (on average 1.4632819582955576) internal successors, (1614), 1104 states have internal predecessors, (1614), 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) [2021-11-22 23:12:14,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-22 23:12:14,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:12:14,429 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] [2021-11-22 23:12:14,429 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:12:14,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:12:14,433 INFO L85 PathProgramCache]: Analyzing trace with hash -590361809, now seen corresponding path program 1 times [2021-11-22 23:12:14,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:12:14,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519477896] [2021-11-22 23:12:14,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:14,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:12:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:12:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:12:14,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:12:14,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519477896] [2021-11-22 23:12:14,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519477896] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:12:14,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:12:14,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 23:12:14,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013397547] [2021-11-22 23:12:14,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:12:14,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 23:12:14,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:12:14,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 23:12:14,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:12:14,757 INFO L87 Difference]: Start difference. First operand has 1105 states, 1103 states have (on average 1.4632819582955576) internal successors, (1614), 1104 states have internal predecessors, (1614), 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 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-11-22 23:12:14,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:12:14,921 INFO L93 Difference]: Finished difference Result 3220 states and 4720 transitions. [2021-11-22 23:12:14,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 23:12:14,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 28 [2021-11-22 23:12:14,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:12:14,948 INFO L225 Difference]: With dead ends: 3220 [2021-11-22 23:12:14,949 INFO L226 Difference]: Without dead ends: 2106 [2021-11-22 23:12:14,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:12:14,966 INFO L933 BasicCegarLoop]: 1490 mSDtfsCounter, 1399 mSDsluCounter, 1464 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1399 SdHoareTripleChecker+Valid, 2954 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 23:12:14,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1399 Valid, 2954 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 23:12:14,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-11-22 23:12:15,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2106. [2021-11-22 23:12:15,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2106 states, 2105 states have (on average 1.356769596199525) internal successors, (2856), 2105 states have internal predecessors, (2856), 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) [2021-11-22 23:12:15,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 2856 transitions. [2021-11-22 23:12:15,069 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 2856 transitions. Word has length 28 [2021-11-22 23:12:15,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:12:15,069 INFO L470 AbstractCegarLoop]: Abstraction has 2106 states and 2856 transitions. [2021-11-22 23:12:15,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-11-22 23:12:15,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 2856 transitions. [2021-11-22 23:12:15,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-22 23:12:15,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:12:15,073 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:12:15,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 23:12:15,074 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:12:15,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:12:15,074 INFO L85 PathProgramCache]: Analyzing trace with hash -722062147, now seen corresponding path program 1 times [2021-11-22 23:12:15,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:12:15,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766550706] [2021-11-22 23:12:15,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:15,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:12:15,120 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 23:12:15,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [379056134] [2021-11-22 23:12:15,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:15,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:12:15,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 23:12:15,122 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) [2021-11-22 23:12:15,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 23:12:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:12:15,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 23:12:15,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 23:12:15,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:12:15,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 23:12:15,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:12:15,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766550706] [2021-11-22 23:12:15,480 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 23:12:15,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379056134] [2021-11-22 23:12:15,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379056134] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:12:15,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:12:15,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 23:12:15,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765244521] [2021-11-22 23:12:15,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:12:15,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 23:12:15,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:12:15,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 23:12:15,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:12:15,482 INFO L87 Difference]: Start difference. First operand 2106 states and 2856 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 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) [2021-11-22 23:12:15,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:12:15,526 INFO L93 Difference]: Finished difference Result 4183 states and 5678 transitions. [2021-11-22 23:12:15,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 23:12:15,527 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 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 34 [2021-11-22 23:12:15,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:12:15,533 INFO L225 Difference]: With dead ends: 4183 [2021-11-22 23:12:15,533 INFO L226 Difference]: Without dead ends: 2106 [2021-11-22 23:12:15,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:12:15,537 INFO L933 BasicCegarLoop]: 1470 mSDtfsCounter, 1457 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1457 SdHoareTripleChecker+Valid, 1470 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 23:12:15,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1457 Valid, 1470 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 23:12:15,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-11-22 23:12:15,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2106. [2021-11-22 23:12:15,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2106 states, 2105 states have (on average 1.3562945368171022) internal successors, (2855), 2105 states have internal predecessors, (2855), 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) [2021-11-22 23:12:15,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 2855 transitions. [2021-11-22 23:12:15,577 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 2855 transitions. Word has length 34 [2021-11-22 23:12:15,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:12:15,578 INFO L470 AbstractCegarLoop]: Abstraction has 2106 states and 2855 transitions. [2021-11-22 23:12:15,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 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) [2021-11-22 23:12:15,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 2855 transitions. [2021-11-22 23:12:15,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-22 23:12:15,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:12:15,613 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:12:15,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 23:12:15,825 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 [2021-11-22 23:12:15,825 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:12:15,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:12:15,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1308868161, now seen corresponding path program 1 times [2021-11-22 23:12:15,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:12:15,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942974594] [2021-11-22 23:12:15,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:15,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:12:15,864 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 23:12:15,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757699491] [2021-11-22 23:12:15,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:15,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:12:15,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 23:12:15,866 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) [2021-11-22 23:12:15,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 23:12:16,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:12:16,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 23:12:16,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 23:12:16,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:12:16,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 23:12:16,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:12:16,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942974594] [2021-11-22 23:12:16,209 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 23:12:16,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757699491] [2021-11-22 23:12:16,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757699491] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:12:16,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:12:16,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 23:12:16,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917581967] [2021-11-22 23:12:16,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:12:16,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 23:12:16,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:12:16,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 23:12:16,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 23:12:16,211 INFO L87 Difference]: Start difference. First operand 2106 states and 2855 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2021-11-22 23:12:16,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:12:16,585 INFO L93 Difference]: Finished difference Result 6258 states and 8496 transitions. [2021-11-22 23:12:16,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 23:12:16,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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 34 [2021-11-22 23:12:16,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:12:16,598 INFO L225 Difference]: With dead ends: 6258 [2021-11-22 23:12:16,598 INFO L226 Difference]: Without dead ends: 4159 [2021-11-22 23:12:16,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-22 23:12:16,602 INFO L933 BasicCegarLoop]: 1365 mSDtfsCounter, 1422 mSDsluCounter, 4045 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1422 SdHoareTripleChecker+Valid, 5410 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 23:12:16,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1422 Valid, 5410 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 23:12:16,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4159 states. [2021-11-22 23:12:16,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4159 to 4007. [2021-11-22 23:12:16,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4007 states, 4006 states have (on average 1.3582126809785322) internal successors, (5441), 4006 states have internal predecessors, (5441), 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) [2021-11-22 23:12:16,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4007 states to 4007 states and 5441 transitions. [2021-11-22 23:12:16,716 INFO L78 Accepts]: Start accepts. Automaton has 4007 states and 5441 transitions. Word has length 34 [2021-11-22 23:12:16,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:12:16,716 INFO L470 AbstractCegarLoop]: Abstraction has 4007 states and 5441 transitions. [2021-11-22 23:12:16,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2021-11-22 23:12:16,716 INFO L276 IsEmpty]: Start isEmpty. Operand 4007 states and 5441 transitions. [2021-11-22 23:12:16,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-22 23:12:16,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:12:16,720 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] [2021-11-22 23:12:16,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 23:12:16,938 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 [2021-11-22 23:12:16,938 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:12:16,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:12:16,939 INFO L85 PathProgramCache]: Analyzing trace with hash 2142284658, now seen corresponding path program 1 times [2021-11-22 23:12:16,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:12:16,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574597943] [2021-11-22 23:12:16,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:16,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:12:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:12:17,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:12:17,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:12:17,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574597943] [2021-11-22 23:12:17,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574597943] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:12:17,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:12:17,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 23:12:17,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809402064] [2021-11-22 23:12:17,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:12:17,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 23:12:17,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:12:17,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 23:12:17,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:12:17,011 INFO L87 Difference]: Start difference. First operand 4007 states and 5441 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2021-11-22 23:12:17,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:12:17,171 INFO L93 Difference]: Finished difference Result 10383 states and 14168 transitions. [2021-11-22 23:12:17,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 23:12:17,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 54 [2021-11-22 23:12:17,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:12:17,194 INFO L225 Difference]: With dead ends: 10383 [2021-11-22 23:12:17,194 INFO L226 Difference]: Without dead ends: 6405 [2021-11-22 23:12:17,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:12:17,204 INFO L933 BasicCegarLoop]: 1502 mSDtfsCounter, 903 mSDsluCounter, 1405 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 2907 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 23:12:17,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [903 Valid, 2907 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 23:12:17,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6405 states. [2021-11-22 23:12:17,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6405 to 6381. [2021-11-22 23:12:17,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6381 states, 6380 states have (on average 1.3684952978056426) internal successors, (8731), 6380 states have internal predecessors, (8731), 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) [2021-11-22 23:12:17,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6381 states to 6381 states and 8731 transitions. [2021-11-22 23:12:17,417 INFO L78 Accepts]: Start accepts. Automaton has 6381 states and 8731 transitions. Word has length 54 [2021-11-22 23:12:17,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:12:17,417 INFO L470 AbstractCegarLoop]: Abstraction has 6381 states and 8731 transitions. [2021-11-22 23:12:17,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2021-11-22 23:12:17,418 INFO L276 IsEmpty]: Start isEmpty. Operand 6381 states and 8731 transitions. [2021-11-22 23:12:17,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-22 23:12:17,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:12:17,422 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] [2021-11-22 23:12:17,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 23:12:17,423 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:12:17,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:12:17,423 INFO L85 PathProgramCache]: Analyzing trace with hash -42958738, now seen corresponding path program 1 times [2021-11-22 23:12:17,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:12:17,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747912607] [2021-11-22 23:12:17,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:17,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:12:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:12:17,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:12:17,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:12:17,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747912607] [2021-11-22 23:12:17,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747912607] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:12:17,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:12:17,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 23:12:17,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541244786] [2021-11-22 23:12:17,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:12:17,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 23:12:17,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:12:17,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 23:12:17,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:12:17,477 INFO L87 Difference]: Start difference. First operand 6381 states and 8731 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2021-11-22 23:12:17,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:12:17,727 INFO L93 Difference]: Finished difference Result 16738 states and 22954 transitions. [2021-11-22 23:12:17,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 23:12:17,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 60 [2021-11-22 23:12:17,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:12:17,761 INFO L225 Difference]: With dead ends: 16738 [2021-11-22 23:12:17,762 INFO L226 Difference]: Without dead ends: 10386 [2021-11-22 23:12:17,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:12:17,774 INFO L933 BasicCegarLoop]: 1477 mSDtfsCounter, 1062 mSDsluCounter, 1405 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1062 SdHoareTripleChecker+Valid, 2882 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 23:12:17,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1062 Valid, 2882 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 23:12:17,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10386 states. [2021-11-22 23:12:18,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10386 to 10349. [2021-11-22 23:12:18,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10349 states, 10348 states have (on average 1.3732122149207577) internal successors, (14210), 10348 states have internal predecessors, (14210), 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) [2021-11-22 23:12:18,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10349 states to 10349 states and 14210 transitions. [2021-11-22 23:12:18,060 INFO L78 Accepts]: Start accepts. Automaton has 10349 states and 14210 transitions. Word has length 60 [2021-11-22 23:12:18,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:12:18,061 INFO L470 AbstractCegarLoop]: Abstraction has 10349 states and 14210 transitions. [2021-11-22 23:12:18,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2021-11-22 23:12:18,061 INFO L276 IsEmpty]: Start isEmpty. Operand 10349 states and 14210 transitions. [2021-11-22 23:12:18,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-22 23:12:18,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:12:18,066 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, 1, 1] [2021-11-22 23:12:18,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 23:12:18,067 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:12:18,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:12:18,067 INFO L85 PathProgramCache]: Analyzing trace with hash 974177374, now seen corresponding path program 1 times [2021-11-22 23:12:18,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:12:18,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726716170] [2021-11-22 23:12:18,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:18,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:12:18,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:12:18,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 23:12:18,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:12:18,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726716170] [2021-11-22 23:12:18,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726716170] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:12:18,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:12:18,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 23:12:18,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286134261] [2021-11-22 23:12:18,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:12:18,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 23:12:18,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:12:18,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 23:12:18,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:12:18,121 INFO L87 Difference]: Start difference. First operand 10349 states and 14210 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2021-11-22 23:12:18,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:12:18,475 INFO L93 Difference]: Finished difference Result 26473 states and 36192 transitions. [2021-11-22 23:12:18,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 23:12:18,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 [2021-11-22 23:12:18,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:12:18,510 INFO L225 Difference]: With dead ends: 26473 [2021-11-22 23:12:18,510 INFO L226 Difference]: Without dead ends: 16153 [2021-11-22 23:12:18,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:12:18,526 INFO L933 BasicCegarLoop]: 2449 mSDtfsCounter, 1056 mSDsluCounter, 1417 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1056 SdHoareTripleChecker+Valid, 3866 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 23:12:18,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1056 Valid, 3866 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 23:12:18,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16153 states. [2021-11-22 23:12:18,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16153 to 16085. [2021-11-22 23:12:18,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16085 states, 16084 states have (on average 1.3629694105943795) internal successors, (21922), 16084 states have internal predecessors, (21922), 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) [2021-11-22 23:12:18,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16085 states to 16085 states and 21922 transitions. [2021-11-22 23:12:18,907 INFO L78 Accepts]: Start accepts. Automaton has 16085 states and 21922 transitions. Word has length 70 [2021-11-22 23:12:18,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:12:18,908 INFO L470 AbstractCegarLoop]: Abstraction has 16085 states and 21922 transitions. [2021-11-22 23:12:18,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2021-11-22 23:12:18,909 INFO L276 IsEmpty]: Start isEmpty. Operand 16085 states and 21922 transitions. [2021-11-22 23:12:18,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-22 23:12:18,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:12:18,914 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] [2021-11-22 23:12:18,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 23:12:18,914 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:12:18,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:12:18,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1695794192, now seen corresponding path program 1 times [2021-11-22 23:12:18,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:12:18,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356580100] [2021-11-22 23:12:18,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:18,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:12:18,959 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 23:12:18,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [238031772] [2021-11-22 23:12:18,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:18,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:12:18,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 23:12:18,961 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) [2021-11-22 23:12:18,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 23:12:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:12:19,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 23:12:19,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 23:12:19,366 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-22 23:12:19,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 23:12:19,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:12:19,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356580100] [2021-11-22 23:12:19,367 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 23:12:19,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238031772] [2021-11-22 23:12:19,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238031772] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:12:19,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:12:19,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 23:12:19,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808189420] [2021-11-22 23:12:19,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:12:19,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 23:12:19,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:12:19,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 23:12:19,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 23:12:19,368 INFO L87 Difference]: Start difference. First operand 16085 states and 21922 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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) [2021-11-22 23:12:19,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:12:19,747 INFO L93 Difference]: Finished difference Result 32194 states and 43886 transitions. [2021-11-22 23:12:19,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 23:12:19,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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 72 [2021-11-22 23:12:19,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:12:19,785 INFO L225 Difference]: With dead ends: 32194 [2021-11-22 23:12:19,786 INFO L226 Difference]: Without dead ends: 16114 [2021-11-22 23:12:19,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 23:12:19,809 INFO L933 BasicCegarLoop]: 1479 mSDtfsCounter, 13 mSDsluCounter, 2946 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 4425 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 23:12:19,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 4425 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 23:12:19,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16114 states. [2021-11-22 23:12:20,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16114 to 16088. [2021-11-22 23:12:20,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16088 states, 16087 states have (on average 1.362404425933984) internal successors, (21917), 16087 states have internal predecessors, (21917), 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) [2021-11-22 23:12:20,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16088 states to 16088 states and 21917 transitions. [2021-11-22 23:12:20,214 INFO L78 Accepts]: Start accepts. Automaton has 16088 states and 21917 transitions. Word has length 72 [2021-11-22 23:12:20,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:12:20,214 INFO L470 AbstractCegarLoop]: Abstraction has 16088 states and 21917 transitions. [2021-11-22 23:12:20,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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) [2021-11-22 23:12:20,215 INFO L276 IsEmpty]: Start isEmpty. Operand 16088 states and 21917 transitions. [2021-11-22 23:12:20,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-22 23:12:20,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:12:20,223 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] [2021-11-22 23:12:20,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 23:12:20,439 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 [2021-11-22 23:12:20,439 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:12:20,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:12:20,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1789741656, now seen corresponding path program 1 times [2021-11-22 23:12:20,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:12:20,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436491472] [2021-11-22 23:12:20,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:20,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:12:20,466 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 23:12:20,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [614009836] [2021-11-22 23:12:20,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:20,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:12:20,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 23:12:20,469 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) [2021-11-22 23:12:20,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 23:12:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:12:20,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 1067 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 23:12:20,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 23:12:20,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-22 23:12:20,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 23:12:20,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:12:20,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436491472] [2021-11-22 23:12:20,911 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 23:12:20,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614009836] [2021-11-22 23:12:20,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614009836] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:12:20,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:12:20,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 23:12:20,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202935904] [2021-11-22 23:12:20,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:12:20,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 23:12:20,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:12:20,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 23:12:20,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 23:12:20,913 INFO L87 Difference]: Start difference. First operand 16088 states and 21917 transitions. Second operand has 4 states, 4 states have (on average 16.75) 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) [2021-11-22 23:12:21,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:12:21,231 INFO L93 Difference]: Finished difference Result 16112 states and 21943 transitions. [2021-11-22 23:12:21,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 23:12:21,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) 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 73 [2021-11-22 23:12:21,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:12:21,265 INFO L225 Difference]: With dead ends: 16112 [2021-11-22 23:12:21,265 INFO L226 Difference]: Without dead ends: 16104 [2021-11-22 23:12:21,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 23:12:21,272 INFO L933 BasicCegarLoop]: 1468 mSDtfsCounter, 1437 mSDsluCounter, 1466 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1437 SdHoareTripleChecker+Valid, 2934 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 23:12:21,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1437 Valid, 2934 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 23:12:21,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16104 states. [2021-11-22 23:12:21,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16104 to 16089. [2021-11-22 23:12:21,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16089 states, 16088 states have (on average 1.3623818995524615) internal successors, (21918), 16088 states have internal predecessors, (21918), 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) [2021-11-22 23:12:21,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16089 states to 16089 states and 21918 transitions. [2021-11-22 23:12:21,576 INFO L78 Accepts]: Start accepts. Automaton has 16089 states and 21918 transitions. Word has length 73 [2021-11-22 23:12:21,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:12:21,576 INFO L470 AbstractCegarLoop]: Abstraction has 16089 states and 21918 transitions. [2021-11-22 23:12:21,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) 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) [2021-11-22 23:12:21,577 INFO L276 IsEmpty]: Start isEmpty. Operand 16089 states and 21918 transitions. [2021-11-22 23:12:21,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-22 23:12:21,583 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:12:21,583 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, 1, 1] [2021-11-22 23:12:21,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 23:12:21,799 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 [2021-11-22 23:12:21,799 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:12:21,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:12:21,800 INFO L85 PathProgramCache]: Analyzing trace with hash 318520324, now seen corresponding path program 1 times [2021-11-22 23:12:21,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:12:21,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683244362] [2021-11-22 23:12:21,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:21,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:12:21,819 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 23:12:21,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1284301599] [2021-11-22 23:12:21,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:21,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:12:21,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 23:12:21,821 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) [2021-11-22 23:12:21,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 23:12:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:12:22,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 1076 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 23:12:22,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 23:12:22,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-22 23:12:22,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 23:12:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-22 23:12:22,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:12:22,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683244362] [2021-11-22 23:12:22,379 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 23:12:22,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284301599] [2021-11-22 23:12:22,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284301599] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 23:12:22,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 23:12:22,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-22 23:12:22,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828681124] [2021-11-22 23:12:22,380 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 23:12:22,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 23:12:22,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:12:22,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 23:12:22,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-22 23:12:22,381 INFO L87 Difference]: Start difference. First operand 16089 states and 21918 transitions. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 7 states have internal predecessors, (135), 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) [2021-11-22 23:12:22,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:12:22,595 INFO L93 Difference]: Finished difference Result 16145 states and 21982 transitions. [2021-11-22 23:12:22,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 23:12:22,596 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 7 states have internal predecessors, (135), 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 [2021-11-22 23:12:22,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:12:22,629 INFO L225 Difference]: With dead ends: 16145 [2021-11-22 23:12:22,630 INFO L226 Difference]: Without dead ends: 16137 [2021-11-22 23:12:22,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-11-22 23:12:22,637 INFO L933 BasicCegarLoop]: 1468 mSDtfsCounter, 2996 mSDsluCounter, 5849 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2996 SdHoareTripleChecker+Valid, 7317 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 23:12:22,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2996 Valid, 7317 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 23:12:22,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16137 states. [2021-11-22 23:12:22,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16137 to 16137. [2021-11-22 23:12:22,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16137 states, 16136 states have (on average 1.3616757560733763) internal successors, (21972), 16136 states have internal predecessors, (21972), 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) [2021-11-22 23:12:23,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16137 states to 16137 states and 21972 transitions. [2021-11-22 23:12:23,024 INFO L78 Accepts]: Start accepts. Automaton has 16137 states and 21972 transitions. Word has length 77 [2021-11-22 23:12:23,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:12:23,025 INFO L470 AbstractCegarLoop]: Abstraction has 16137 states and 21972 transitions. [2021-11-22 23:12:23,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 7 states have internal predecessors, (135), 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) [2021-11-22 23:12:23,025 INFO L276 IsEmpty]: Start isEmpty. Operand 16137 states and 21972 transitions. [2021-11-22 23:12:23,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-22 23:12:23,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:12:23,032 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, 1, 1] [2021-11-22 23:12:23,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 23:12:23,251 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 [2021-11-22 23:12:23,251 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:12:23,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:12:23,251 INFO L85 PathProgramCache]: Analyzing trace with hash -201740936, now seen corresponding path program 1 times [2021-11-22 23:12:23,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:12:23,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569237906] [2021-11-22 23:12:23,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:23,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:12:23,271 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 23:12:23,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [34054787] [2021-11-22 23:12:23,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:23,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:12:23,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 23:12:23,272 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) [2021-11-22 23:12:23,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 23:12:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:12:23,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 1100 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 23:12:23,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 23:12:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-22 23:12:23,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 23:12:23,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:12:23,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569237906] [2021-11-22 23:12:23,679 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 23:12:23,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34054787] [2021-11-22 23:12:23,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34054787] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:12:23,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:12:23,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 23:12:23,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129046207] [2021-11-22 23:12:23,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:12:23,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 23:12:23,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:12:23,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 23:12:23,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:12:23,680 INFO L87 Difference]: Start difference. First operand 16137 states and 21972 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) [2021-11-22 23:12:23,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:12:23,854 INFO L93 Difference]: Finished difference Result 24120 states and 32867 transitions. [2021-11-22 23:12:23,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 23:12:23,855 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 79 [2021-11-22 23:12:23,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:12:23,871 INFO L225 Difference]: With dead ends: 24120 [2021-11-22 23:12:23,871 INFO L226 Difference]: Without dead ends: 7995 [2021-11-22 23:12:23,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:12:23,891 INFO L933 BasicCegarLoop]: 1494 mSDtfsCounter, 1385 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1385 SdHoareTripleChecker+Valid, 1567 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 23:12:23,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1385 Valid, 1567 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 23:12:23,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7995 states. [2021-11-22 23:12:24,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7995 to 7995. [2021-11-22 23:12:24,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7995 states, 7994 states have (on average 1.3598949211908933) internal successors, (10871), 7994 states have internal predecessors, (10871), 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) [2021-11-22 23:12:24,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7995 states to 7995 states and 10871 transitions. [2021-11-22 23:12:24,037 INFO L78 Accepts]: Start accepts. Automaton has 7995 states and 10871 transitions. Word has length 79 [2021-11-22 23:12:24,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:12:24,038 INFO L470 AbstractCegarLoop]: Abstraction has 7995 states and 10871 transitions. [2021-11-22 23:12:24,038 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) [2021-11-22 23:12:24,038 INFO L276 IsEmpty]: Start isEmpty. Operand 7995 states and 10871 transitions. [2021-11-22 23:12:24,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-22 23:12:24,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:12:24,045 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, 1, 1] [2021-11-22 23:12:24,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 23:12:24,264 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 [2021-11-22 23:12:24,265 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:12:24,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:12:24,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1837464344, now seen corresponding path program 2 times [2021-11-22 23:12:24,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:12:24,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465943513] [2021-11-22 23:12:24,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:24,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:12:24,314 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 23:12:24,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287542527] [2021-11-22 23:12:24,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 23:12:24,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:12:24,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 23:12:24,328 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) [2021-11-22 23:12:24,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 23:12:24,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 23:12:24,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 23:12:24,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 23:12:24,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 23:12:24,844 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-22 23:12:24,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 23:12:25,002 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-22 23:12:25,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:12:25,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465943513] [2021-11-22 23:12:25,002 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 23:12:25,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287542527] [2021-11-22 23:12:25,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287542527] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 23:12:25,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 23:12:25,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-22 23:12:25,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324851285] [2021-11-22 23:12:25,003 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 23:12:25,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-22 23:12:25,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:12:25,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-22 23:12:25,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2021-11-22 23:12:25,004 INFO L87 Difference]: Start difference. First operand 7995 states and 10871 transitions. Second operand has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 13 states have internal predecessors, (159), 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) [2021-11-22 23:12:25,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:12:25,211 INFO L93 Difference]: Finished difference Result 8099 states and 10992 transitions. [2021-11-22 23:12:25,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-22 23:12:25,211 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 13 states have internal predecessors, (159), 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 89 [2021-11-22 23:12:25,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:12:25,225 INFO L225 Difference]: With dead ends: 8099 [2021-11-22 23:12:25,225 INFO L226 Difference]: Without dead ends: 8091 [2021-11-22 23:12:25,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2021-11-22 23:12:25,229 INFO L933 BasicCegarLoop]: 1465 mSDtfsCounter, 1822 mSDsluCounter, 3031 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1822 SdHoareTripleChecker+Valid, 4496 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 23:12:25,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1822 Valid, 4496 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 23:12:25,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8091 states. [2021-11-22 23:12:25,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8091 to 8091. [2021-11-22 23:12:25,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8091 states, 8090 states have (on average 1.3571075401730532) internal successors, (10979), 8090 states have internal predecessors, (10979), 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) [2021-11-22 23:12:25,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8091 states to 8091 states and 10979 transitions. [2021-11-22 23:12:25,380 INFO L78 Accepts]: Start accepts. Automaton has 8091 states and 10979 transitions. Word has length 89 [2021-11-22 23:12:25,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:12:25,380 INFO L470 AbstractCegarLoop]: Abstraction has 8091 states and 10979 transitions. [2021-11-22 23:12:25,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 13 states have internal predecessors, (159), 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) [2021-11-22 23:12:25,381 INFO L276 IsEmpty]: Start isEmpty. Operand 8091 states and 10979 transitions. [2021-11-22 23:12:25,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-22 23:12:25,394 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:12:25,394 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] [2021-11-22 23:12:25,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 23:12:25,607 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 [2021-11-22 23:12:25,608 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:12:25,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:12:25,608 INFO L85 PathProgramCache]: Analyzing trace with hash -374931648, now seen corresponding path program 3 times [2021-11-22 23:12:25,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:12:25,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982828084] [2021-11-22 23:12:25,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:25,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:12:25,638 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 23:12:25,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [517595490] [2021-11-22 23:12:25,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 23:12:25,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:12:25,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 23:12:25,662 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) [2021-11-22 23:12:25,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 23:12:25,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-22 23:12:25,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 23:12:25,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-22 23:12:25,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 23:12:26,096 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-11-22 23:12:26,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 23:12:26,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:12:26,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982828084] [2021-11-22 23:12:26,097 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 23:12:26,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517595490] [2021-11-22 23:12:26,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517595490] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:12:26,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:12:26,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 23:12:26,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946018946] [2021-11-22 23:12:26,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:12:26,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 23:12:26,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:12:26,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 23:12:26,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 23:12:26,099 INFO L87 Difference]: Start difference. First operand 8091 states and 10979 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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) [2021-11-22 23:12:26,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:12:26,800 INFO L93 Difference]: Finished difference Result 36728 states and 49953 transitions. [2021-11-22 23:12:26,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 23:12:26,800 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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 [2021-11-22 23:12:26,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:12:26,859 INFO L225 Difference]: With dead ends: 36728 [2021-11-22 23:12:26,860 INFO L226 Difference]: Without dead ends: 28716 [2021-11-22 23:12:26,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 23:12:26,880 INFO L933 BasicCegarLoop]: 2493 mSDtfsCounter, 3811 mSDsluCounter, 3870 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3811 SdHoareTripleChecker+Valid, 6363 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 23:12:26,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3811 Valid, 6363 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 23:12:26,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28716 states. [2021-11-22 23:12:27,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28716 to 8219. [2021-11-22 23:12:27,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8219 states, 8218 states have (on average 1.3515453881723047) internal successors, (11107), 8218 states have internal predecessors, (11107), 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) [2021-11-22 23:12:27,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8219 states to 8219 states and 11107 transitions. [2021-11-22 23:12:27,298 INFO L78 Accepts]: Start accepts. Automaton has 8219 states and 11107 transitions. Word has length 113 [2021-11-22 23:12:27,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:12:27,299 INFO L470 AbstractCegarLoop]: Abstraction has 8219 states and 11107 transitions. [2021-11-22 23:12:27,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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) [2021-11-22 23:12:27,299 INFO L276 IsEmpty]: Start isEmpty. Operand 8219 states and 11107 transitions. [2021-11-22 23:12:27,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-22 23:12:27,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:12:27,312 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, 1] [2021-11-22 23:12:27,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-22 23:12:27,533 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 [2021-11-22 23:12:27,534 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:12:27,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:12:27,534 INFO L85 PathProgramCache]: Analyzing trace with hash 970064774, now seen corresponding path program 1 times [2021-11-22 23:12:27,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:12:27,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426658687] [2021-11-22 23:12:27,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:27,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:12:27,574 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 23:12:27,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28337252] [2021-11-22 23:12:27,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:27,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:12:27,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 23:12:27,585 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) [2021-11-22 23:12:27,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 23:12:27,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:12:27,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 23:12:27,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 23:12:28,037 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-22 23:12:28,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 23:12:28,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:12:28,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426658687] [2021-11-22 23:12:28,038 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 23:12:28,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28337252] [2021-11-22 23:12:28,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28337252] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:12:28,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:12:28,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 23:12:28,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987852402] [2021-11-22 23:12:28,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:12:28,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 23:12:28,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:12:28,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 23:12:28,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:12:28,040 INFO L87 Difference]: Start difference. First operand 8219 states and 11107 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2021-11-22 23:12:28,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:12:28,431 INFO L93 Difference]: Finished difference Result 19090 states and 25954 transitions. [2021-11-22 23:12:28,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 23:12:28,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 115 [2021-11-22 23:12:28,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:12:28,447 INFO L225 Difference]: With dead ends: 19090 [2021-11-22 23:12:28,447 INFO L226 Difference]: Without dead ends: 10950 [2021-11-22 23:12:28,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:12:28,485 INFO L933 BasicCegarLoop]: 1455 mSDtfsCounter, 1166 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1166 SdHoareTripleChecker+Valid, 2592 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 23:12:28,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1166 Valid, 2592 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 23:12:28,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10950 states. [2021-11-22 23:12:28,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10950 to 10781. [2021-11-22 23:12:28,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10781 states, 10780 states have (on average 1.3641929499072356) internal successors, (14706), 10780 states have internal predecessors, (14706), 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) [2021-11-22 23:12:28,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10781 states to 10781 states and 14706 transitions. [2021-11-22 23:12:28,850 INFO L78 Accepts]: Start accepts. Automaton has 10781 states and 14706 transitions. Word has length 115 [2021-11-22 23:12:28,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:12:28,850 INFO L470 AbstractCegarLoop]: Abstraction has 10781 states and 14706 transitions. [2021-11-22 23:12:28,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2021-11-22 23:12:28,850 INFO L276 IsEmpty]: Start isEmpty. Operand 10781 states and 14706 transitions. [2021-11-22 23:12:28,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-22 23:12:28,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:12:28,866 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, 1] [2021-11-22 23:12:28,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-22 23:12:29,077 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 [2021-11-22 23:12:29,077 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:12:29,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:12:29,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1081431410, now seen corresponding path program 1 times [2021-11-22 23:12:29,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:12:29,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358054374] [2021-11-22 23:12:29,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:29,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:12:29,116 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 23:12:29,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [997834769] [2021-11-22 23:12:29,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:29,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:12:29,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 23:12:29,118 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) [2021-11-22 23:12:29,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-22 23:12:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:12:29,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 23:12:29,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 23:12:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-11-22 23:12:29,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 23:12:29,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:12:29,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358054374] [2021-11-22 23:12:29,622 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 23:12:29,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997834769] [2021-11-22 23:12:29,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997834769] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:12:29,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:12:29,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 23:12:29,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446350412] [2021-11-22 23:12:29,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:12:29,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 23:12:29,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:12:29,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 23:12:29,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:12:29,623 INFO L87 Difference]: Start difference. First operand 10781 states and 14706 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) [2021-11-22 23:12:30,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:12:30,141 INFO L93 Difference]: Finished difference Result 25783 states and 35212 transitions. [2021-11-22 23:12:30,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 23:12:30,142 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 115 [2021-11-22 23:12:30,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:12:30,179 INFO L225 Difference]: With dead ends: 25783 [2021-11-22 23:12:30,179 INFO L226 Difference]: Without dead ends: 20163 [2021-11-22 23:12:30,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:12:30,194 INFO L933 BasicCegarLoop]: 2553 mSDtfsCounter, 1248 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1248 SdHoareTripleChecker+Valid, 3857 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 23:12:30,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1248 Valid, 3857 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 23:12:30,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20163 states. [2021-11-22 23:12:30,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20163 to 10957. [2021-11-22 23:12:30,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10957 states, 10956 states have (on average 1.3583424607520993) internal successors, (14882), 10956 states have internal predecessors, (14882), 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) [2021-11-22 23:12:30,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10957 states to 10957 states and 14882 transitions. [2021-11-22 23:12:30,566 INFO L78 Accepts]: Start accepts. Automaton has 10957 states and 14882 transitions. Word has length 115 [2021-11-22 23:12:30,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:12:30,567 INFO L470 AbstractCegarLoop]: Abstraction has 10957 states and 14882 transitions. [2021-11-22 23:12:30,567 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) [2021-11-22 23:12:30,567 INFO L276 IsEmpty]: Start isEmpty. Operand 10957 states and 14882 transitions. [2021-11-22 23:12:30,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-22 23:12:30,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:12:30,582 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, 1, 1] [2021-11-22 23:12:30,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-22 23:12:30,787 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 [2021-11-22 23:12:30,788 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:12:30,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:12:30,788 INFO L85 PathProgramCache]: Analyzing trace with hash 2007357891, now seen corresponding path program 1 times [2021-11-22 23:12:30,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:12:30,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328343785] [2021-11-22 23:12:30,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:30,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:12:30,829 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 23:12:30,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [175973661] [2021-11-22 23:12:30,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:30,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:12:30,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 23:12:30,856 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) [2021-11-22 23:12:30,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-22 23:12:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:12:31,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 1195 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-22 23:12:31,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 23:12:31,567 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-22 23:12:31,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 23:12:31,887 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-22 23:12:31,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:12:31,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328343785] [2021-11-22 23:12:31,888 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 23:12:31,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175973661] [2021-11-22 23:12:31,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175973661] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 23:12:31,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 23:12:31,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-11-22 23:12:31,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604293891] [2021-11-22 23:12:31,888 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 23:12:31,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-22 23:12:31,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:12:31,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-22 23:12:31,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2021-11-22 23:12:31,889 INFO L87 Difference]: Start difference. First operand 10957 states and 14882 transitions. Second operand has 26 states, 26 states have (on average 8.192307692307692) internal successors, (213), 25 states have internal predecessors, (213), 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) [2021-11-22 23:12:32,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:12:32,555 INFO L93 Difference]: Finished difference Result 11157 states and 15117 transitions. [2021-11-22 23:12:32,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-22 23:12:32,556 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 8.192307692307692) internal successors, (213), 25 states have internal predecessors, (213), 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 116 [2021-11-22 23:12:32,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:12:32,570 INFO L225 Difference]: With dead ends: 11157 [2021-11-22 23:12:32,570 INFO L226 Difference]: Without dead ends: 11149 [2021-11-22 23:12:32,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2021-11-22 23:12:32,575 INFO L933 BasicCegarLoop]: 1465 mSDtfsCounter, 4040 mSDsluCounter, 9003 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4040 SdHoareTripleChecker+Valid, 10468 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 23:12:32,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4040 Valid, 10468 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 23:12:32,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11149 states. [2021-11-22 23:12:32,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11149 to 11149. [2021-11-22 23:12:32,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11149 states, 11148 states have (on average 1.35432364549695) internal successors, (15098), 11148 states have internal predecessors, (15098), 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) [2021-11-22 23:12:32,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11149 states to 11149 states and 15098 transitions. [2021-11-22 23:12:32,890 INFO L78 Accepts]: Start accepts. Automaton has 11149 states and 15098 transitions. Word has length 116 [2021-11-22 23:12:32,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:12:32,891 INFO L470 AbstractCegarLoop]: Abstraction has 11149 states and 15098 transitions. [2021-11-22 23:12:32,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.192307692307692) internal successors, (213), 25 states have internal predecessors, (213), 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) [2021-11-22 23:12:32,891 INFO L276 IsEmpty]: Start isEmpty. Operand 11149 states and 15098 transitions. [2021-11-22 23:12:32,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-22 23:12:32,907 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:12:32,907 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, 1, 1] [2021-11-22 23:12:32,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-22 23:12:33,112 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 [2021-11-22 23:12:33,113 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:12:33,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:12:33,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1671350291, now seen corresponding path program 2 times [2021-11-22 23:12:33,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:12:33,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413866423] [2021-11-22 23:12:33,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:33,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:12:33,196 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 23:12:33,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1176165348] [2021-11-22 23:12:33,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 23:12:33,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:12:33,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 23:12:33,198 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) [2021-11-22 23:12:33,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-22 23:12:33,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 23:12:33,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 23:12:33,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-22 23:12:33,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 23:12:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-22 23:12:34,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 23:12:34,857 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-22 23:12:34,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:12:34,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413866423] [2021-11-22 23:12:34,857 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 23:12:34,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176165348] [2021-11-22 23:12:34,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176165348] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 23:12:34,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 23:12:34,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2021-11-22 23:12:34,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83492771] [2021-11-22 23:12:34,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 23:12:34,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-22 23:12:34,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:12:34,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-22 23:12:34,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2021-11-22 23:12:34,860 INFO L87 Difference]: Start difference. First operand 11149 states and 15098 transitions. Second operand has 50 states, 50 states have (on average 6.18) internal successors, (309), 49 states have internal predecessors, (309), 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) [2021-11-22 23:12:36,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:12:36,471 INFO L93 Difference]: Finished difference Result 11541 states and 15561 transitions. [2021-11-22 23:12:36,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-22 23:12:36,472 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 6.18) internal successors, (309), 49 states have internal predecessors, (309), 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 164 [2021-11-22 23:12:36,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:12:36,485 INFO L225 Difference]: With dead ends: 11541 [2021-11-22 23:12:36,486 INFO L226 Difference]: Without dead ends: 11533 [2021-11-22 23:12:36,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2021-11-22 23:12:36,491 INFO L933 BasicCegarLoop]: 1465 mSDtfsCounter, 4332 mSDsluCounter, 6467 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4332 SdHoareTripleChecker+Valid, 7932 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 23:12:36,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4332 Valid, 7932 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 23:12:36,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11533 states. [2021-11-22 23:12:36,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11533 to 11533. [2021-11-22 23:12:36,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11533 states, 11532 states have (on average 1.3466874783211933) internal successors, (15530), 11532 states have internal predecessors, (15530), 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) [2021-11-22 23:12:36,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11533 states to 11533 states and 15530 transitions. [2021-11-22 23:12:36,816 INFO L78 Accepts]: Start accepts. Automaton has 11533 states and 15530 transitions. Word has length 164 [2021-11-22 23:12:36,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:12:36,818 INFO L470 AbstractCegarLoop]: Abstraction has 11533 states and 15530 transitions. [2021-11-22 23:12:36,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 6.18) internal successors, (309), 49 states have internal predecessors, (309), 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) [2021-11-22 23:12:36,818 INFO L276 IsEmpty]: Start isEmpty. Operand 11533 states and 15530 transitions. [2021-11-22 23:12:36,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-22 23:12:36,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:12:36,860 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] [2021-11-22 23:12:36,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-22 23:12:37,061 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 [2021-11-22 23:12:37,061 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:12:37,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:12:37,061 INFO L85 PathProgramCache]: Analyzing trace with hash -816511821, now seen corresponding path program 3 times [2021-11-22 23:12:37,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:12:37,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726303835] [2021-11-22 23:12:37,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:37,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:12:37,088 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 23:12:37,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [559443941] [2021-11-22 23:12:37,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 23:12:37,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:12:37,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 23:12:37,104 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) [2021-11-22 23:12:37,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-22 23:12:37,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-22 23:12:37,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 23:12:37,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 957 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-22 23:12:37,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 23:12:37,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4189 trivial. 0 not checked. [2021-11-22 23:12:37,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 23:12:37,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:12:37,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726303835] [2021-11-22 23:12:37,858 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 23:12:37,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559443941] [2021-11-22 23:12:37,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559443941] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:12:37,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:12:37,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-22 23:12:37,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949617244] [2021-11-22 23:12:37,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:12:37,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 23:12:37,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:12:37,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 23:12:37,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-22 23:12:37,860 INFO L87 Difference]: Start difference. First operand 11533 states and 15530 transitions. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 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) [2021-11-22 23:12:44,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:12:44,237 INFO L93 Difference]: Finished difference Result 125600 states and 170883 transitions. [2021-11-22 23:12:44,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-22 23:12:44,237 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 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 260 [2021-11-22 23:12:44,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:12:44,480 INFO L225 Difference]: With dead ends: 125600 [2021-11-22 23:12:44,481 INFO L226 Difference]: Without dead ends: 114146 [2021-11-22 23:12:44,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=320, Invalid=870, Unknown=0, NotChecked=0, Total=1190 [2021-11-22 23:12:44,519 INFO L933 BasicCegarLoop]: 5829 mSDtfsCounter, 18882 mSDsluCounter, 36127 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18882 SdHoareTripleChecker+Valid, 41956 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-22 23:12:44,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18882 Valid, 41956 Invalid, 1225 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [99 Valid, 1126 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-22 23:12:44,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114146 states. [2021-11-22 23:12:46,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114146 to 11629. [2021-11-22 23:12:46,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11629 states, 11628 states have (on average 1.3379772961816305) internal successors, (15558), 11628 states have internal predecessors, (15558), 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) [2021-11-22 23:12:46,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11629 states to 11629 states and 15558 transitions. [2021-11-22 23:12:46,375 INFO L78 Accepts]: Start accepts. Automaton has 11629 states and 15558 transitions. Word has length 260 [2021-11-22 23:12:46,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:12:46,375 INFO L470 AbstractCegarLoop]: Abstraction has 11629 states and 15558 transitions. [2021-11-22 23:12:46,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 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) [2021-11-22 23:12:46,375 INFO L276 IsEmpty]: Start isEmpty. Operand 11629 states and 15558 transitions. [2021-11-22 23:12:46,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-11-22 23:12:46,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:12:46,391 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] [2021-11-22 23:12:46,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-22 23:12:46,612 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 [2021-11-22 23:12:46,612 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:12:46,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:12:46,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1640043171, now seen corresponding path program 1 times [2021-11-22 23:12:46,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:12:46,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605347949] [2021-11-22 23:12:46,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:46,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:12:46,636 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 23:12:46,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2057872104] [2021-11-22 23:12:46,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:46,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:12:46,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 23:12:46,650 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) [2021-11-22 23:12:46,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-22 23:12:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:12:47,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 1465 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 23:12:47,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 23:12:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4189 trivial. 0 not checked. [2021-11-22 23:12:47,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 23:12:47,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:12:47,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605347949] [2021-11-22 23:12:47,395 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 23:12:47,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057872104] [2021-11-22 23:12:47,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057872104] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:12:47,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:12:47,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 23:12:47,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568397484] [2021-11-22 23:12:47,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:12:47,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 23:12:47,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:12:47,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 23:12:47,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 23:12:47,397 INFO L87 Difference]: Start difference. First operand 11629 states and 15558 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2021-11-22 23:12:48,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:12:48,947 INFO L93 Difference]: Finished difference Result 27341 states and 36580 transitions. [2021-11-22 23:12:48,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 23:12:48,948 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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 261 [2021-11-22 23:12:48,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:12:48,969 INFO L225 Difference]: With dead ends: 27341 [2021-11-22 23:12:48,969 INFO L226 Difference]: Without dead ends: 15249 [2021-11-22 23:12:49,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 23:12:49,000 INFO L933 BasicCegarLoop]: 2478 mSDtfsCounter, 2223 mSDsluCounter, 2513 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2223 SdHoareTripleChecker+Valid, 4991 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 23:12:49,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2223 Valid, 4991 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 23:12:49,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15249 states. [2021-11-22 23:12:49,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15249 to 11082. [2021-11-22 23:12:49,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11082 states, 11081 states have (on average 1.3221730890713834) internal successors, (14651), 11081 states have internal predecessors, (14651), 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) [2021-11-22 23:12:49,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11082 states to 11082 states and 14651 transitions. [2021-11-22 23:12:49,736 INFO L78 Accepts]: Start accepts. Automaton has 11082 states and 14651 transitions. Word has length 261 [2021-11-22 23:12:49,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:12:49,737 INFO L470 AbstractCegarLoop]: Abstraction has 11082 states and 14651 transitions. [2021-11-22 23:12:49,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2021-11-22 23:12:49,737 INFO L276 IsEmpty]: Start isEmpty. Operand 11082 states and 14651 transitions. [2021-11-22 23:12:49,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-22 23:12:49,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:12:49,750 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, 1, 1] [2021-11-22 23:12:49,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-22 23:12:49,963 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 [2021-11-22 23:12:49,963 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:12:49,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:12:49,964 INFO L85 PathProgramCache]: Analyzing trace with hash -661220978, now seen corresponding path program 1 times [2021-11-22 23:12:49,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:12:49,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505949409] [2021-11-22 23:12:49,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:49,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:12:49,986 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 23:12:49,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506082930] [2021-11-22 23:12:49,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:49,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:12:49,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 23:12:49,987 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) [2021-11-22 23:12:50,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-22 23:12:50,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:12:50,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 1529 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-22 23:12:50,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 23:12:51,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-22 23:12:51,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 23:12:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-22 23:12:54,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:12:54,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505949409] [2021-11-22 23:12:54,991 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 23:12:54,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506082930] [2021-11-22 23:12:54,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506082930] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 23:12:54,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 23:12:54,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2021-11-22 23:12:54,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106855497] [2021-11-22 23:12:54,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 23:12:54,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-22 23:12:54,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:12:54,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-22 23:12:54,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2021-11-22 23:12:54,997 INFO L87 Difference]: Start difference. First operand 11082 states and 14651 transitions. Second operand has 98 states, 98 states have (on average 5.214285714285714) internal successors, (511), 97 states have internal predecessors, (511), 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) [2021-11-22 23:13:03,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:13:03,688 INFO L93 Difference]: Finished difference Result 11858 states and 15570 transitions. [2021-11-22 23:13:03,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-22 23:13:03,690 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 5.214285714285714) internal successors, (511), 97 states have internal predecessors, (511), 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 265 [2021-11-22 23:13:03,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:13:03,707 INFO L225 Difference]: With dead ends: 11858 [2021-11-22 23:13:03,707 INFO L226 Difference]: Without dead ends: 11850 [2021-11-22 23:13:03,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2021-11-22 23:13:03,715 INFO L933 BasicCegarLoop]: 1465 mSDtfsCounter, 7666 mSDsluCounter, 7187 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7666 SdHoareTripleChecker+Valid, 8652 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-22 23:13:03,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7666 Valid, 8652 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-22 23:13:03,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11850 states. [2021-11-22 23:13:04,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11850 to 11850. [2021-11-22 23:13:04,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11850 states, 11849 states have (on average 1.3093931977382058) internal successors, (15515), 11849 states have internal predecessors, (15515), 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) [2021-11-22 23:13:04,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11850 states to 11850 states and 15515 transitions. [2021-11-22 23:13:04,629 INFO L78 Accepts]: Start accepts. Automaton has 11850 states and 15515 transitions. Word has length 265 [2021-11-22 23:13:04,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:13:04,630 INFO L470 AbstractCegarLoop]: Abstraction has 11850 states and 15515 transitions. [2021-11-22 23:13:04,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 5.214285714285714) internal successors, (511), 97 states have internal predecessors, (511), 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) [2021-11-22 23:13:04,630 INFO L276 IsEmpty]: Start isEmpty. Operand 11850 states and 15515 transitions. [2021-11-22 23:13:04,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2021-11-22 23:13:04,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:13:04,646 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, 1, 1] [2021-11-22 23:13:04,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-22 23:13:04,855 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 [2021-11-22 23:13:04,855 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:13:04,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:13:04,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1214807346, now seen corresponding path program 2 times [2021-11-22 23:13:04,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:13:04,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902520149] [2021-11-22 23:13:04,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:13:04,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:13:04,914 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 23:13:04,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1381055967] [2021-11-22 23:13:04,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 23:13:04,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:13:04,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 23:13:04,915 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) [2021-11-22 23:13:04,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-22 23:13:05,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 23:13:05,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 23:13:05,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 1961 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-22 23:13:05,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 23:13:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 17589 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-22 23:13:09,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 23:13:30,538 INFO L134 CoverageAnalysis]: Checked inductivity of 17589 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-22 23:13:30,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:13:30,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902520149] [2021-11-22 23:13:30,538 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 23:13:30,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381055967] [2021-11-22 23:13:30,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381055967] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 23:13:30,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 23:13:30,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 193 [2021-11-22 23:13:30,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162801822] [2021-11-22 23:13:30,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 23:13:30,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2021-11-22 23:13:30,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:13:30,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2021-11-22 23:13:30,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18531, Invalid=18911, Unknown=0, NotChecked=0, Total=37442 [2021-11-22 23:13:30,553 INFO L87 Difference]: Start difference. First operand 11850 states and 15515 transitions. Second operand has 194 states, 194 states have (on average 4.61340206185567) internal successors, (895), 193 states have internal predecessors, (895), 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) [2021-11-22 23:16:22,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:16:22,558 INFO L93 Difference]: Finished difference Result 13394 states and 17346 transitions. [2021-11-22 23:16:22,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-11-22 23:16:22,564 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 4.61340206185567) internal successors, (895), 193 states have internal predecessors, (895), 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 457 [2021-11-22 23:16:22,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:16:22,583 INFO L225 Difference]: With dead ends: 13394 [2021-11-22 23:16:22,583 INFO L226 Difference]: Without dead ends: 13386 [2021-11-22 23:16:22,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1007 GetRequests, 720 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18145 ImplicationChecksByTransitivity, 149.8s TimeCoverageRelationStatistics Valid=36961, Invalid=46271, Unknown=0, NotChecked=0, Total=83232 [2021-11-22 23:16:22,601 INFO L933 BasicCegarLoop]: 1465 mSDtfsCounter, 17847 mSDsluCounter, 10075 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17847 SdHoareTripleChecker+Valid, 11540 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-22 23:16:22,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17847 Valid, 11540 Invalid, 911 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [293 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-22 23:16:22,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13386 states. [2021-11-22 23:16:23,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13386 to 13386. [2021-11-22 23:16:23,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13386 states, 13385 states have (on average 1.2882330967500935) internal successors, (17243), 13385 states have internal predecessors, (17243), 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) [2021-11-22 23:16:23,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13386 states to 13386 states and 17243 transitions. [2021-11-22 23:16:23,682 INFO L78 Accepts]: Start accepts. Automaton has 13386 states and 17243 transitions. Word has length 457 [2021-11-22 23:16:23,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:16:23,683 INFO L470 AbstractCegarLoop]: Abstraction has 13386 states and 17243 transitions. [2021-11-22 23:16:23,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 4.61340206185567) internal successors, (895), 193 states have internal predecessors, (895), 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) [2021-11-22 23:16:23,684 INFO L276 IsEmpty]: Start isEmpty. Operand 13386 states and 17243 transitions. [2021-11-22 23:16:23,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 842 [2021-11-22 23:16:23,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:16:23,709 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] [2021-11-22 23:16:23,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-22 23:16:23,923 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 [2021-11-22 23:16:23,924 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:16:23,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:16:23,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1142908238, now seen corresponding path program 3 times [2021-11-22 23:16:23,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:16:23,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826917172] [2021-11-22 23:16:23,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:16:23,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:16:23,955 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 23:16:23,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746838715] [2021-11-22 23:16:23,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 23:16:23,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:16:23,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 23:16:23,956 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) [2021-11-22 23:16:23,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-22 23:16:24,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-22 23:16:24,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 23:16:24,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-22 23:16:24,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 23:16:25,178 INFO L134 CoverageAnalysis]: Checked inductivity of 72021 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 72013 trivial. 0 not checked. [2021-11-22 23:16:25,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 23:16:25,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:16:25,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826917172] [2021-11-22 23:16:25,179 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 23:16:25,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746838715] [2021-11-22 23:16:25,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746838715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:16:25,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:16:25,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-22 23:16:25,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416696901] [2021-11-22 23:16:25,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:16:25,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 23:16:25,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:16:25,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 23:16:25,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-22 23:16:25,180 INFO L87 Difference]: Start difference. First operand 13386 states and 17243 transitions. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 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) [2021-11-22 23:16:39,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:16:39,473 INFO L93 Difference]: Finished difference Result 149985 states and 195156 transitions. [2021-11-22 23:16:39,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-22 23:16:39,473 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 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 841 [2021-11-22 23:16:39,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:16:39,733 INFO L225 Difference]: With dead ends: 149985 [2021-11-22 23:16:39,733 INFO L226 Difference]: Without dead ends: 136678 [2021-11-22 23:16:39,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 875 GetRequests, 842 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=870, Unknown=0, NotChecked=0, Total=1190 [2021-11-22 23:16:39,774 INFO L933 BasicCegarLoop]: 5541 mSDtfsCounter, 19768 mSDsluCounter, 35744 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19768 SdHoareTripleChecker+Valid, 41285 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-22 23:16:39,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19768 Valid, 41285 Invalid, 1244 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [89 Valid, 1155 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-22 23:16:40,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136678 states. [2021-11-22 23:16:42,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136678 to 13458. [2021-11-22 23:16:42,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13458 states, 13457 states have (on average 1.286690941517426) internal successors, (17315), 13457 states have internal predecessors, (17315), 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) [2021-11-22 23:16:42,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13458 states to 13458 states and 17315 transitions. [2021-11-22 23:16:42,065 INFO L78 Accepts]: Start accepts. Automaton has 13458 states and 17315 transitions. Word has length 841 [2021-11-22 23:16:42,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:16:42,065 INFO L470 AbstractCegarLoop]: Abstraction has 13458 states and 17315 transitions. [2021-11-22 23:16:42,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 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) [2021-11-22 23:16:42,065 INFO L276 IsEmpty]: Start isEmpty. Operand 13458 states and 17315 transitions. [2021-11-22 23:16:42,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2021-11-22 23:16:42,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:16:42,088 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] [2021-11-22 23:16:42,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-22 23:16:42,306 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 [2021-11-22 23:16:42,306 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:16:42,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:16:42,307 INFO L85 PathProgramCache]: Analyzing trace with hash 634176715, now seen corresponding path program 1 times [2021-11-22 23:16:42,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:16:42,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547116949] [2021-11-22 23:16:42,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:16:42,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:16:42,358 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 23:16:42,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059380723] [2021-11-22 23:16:42,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:16:42,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:16:42,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 23:16:42,360 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) [2021-11-22 23:16:42,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-22 23:16:42,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:16:42,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 3002 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 23:16:42,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 23:16:43,781 INFO L134 CoverageAnalysis]: Checked inductivity of 72021 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 72013 trivial. 0 not checked. [2021-11-22 23:16:43,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 23:16:43,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:16:43,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547116949] [2021-11-22 23:16:43,782 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 23:16:43,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059380723] [2021-11-22 23:16:43,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059380723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:16:43,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:16:43,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 23:16:43,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191054282] [2021-11-22 23:16:43,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:16:43,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 23:16:43,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:16:43,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 23:16:43,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-22 23:16:43,784 INFO L87 Difference]: Start difference. First operand 13458 states and 17315 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 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) [2021-11-22 23:16:54,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:16:54,498 INFO L93 Difference]: Finished difference Result 47706 states and 60923 transitions. [2021-11-22 23:16:54,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 23:16:54,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 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 [2021-11-22 23:16:54,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:16:54,559 INFO L225 Difference]: With dead ends: 47706 [2021-11-22 23:16:54,560 INFO L226 Difference]: Without dead ends: 39034 [2021-11-22 23:16:54,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 844 GetRequests, 841 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-22 23:16:54,579 INFO L933 BasicCegarLoop]: 2542 mSDtfsCounter, 5121 mSDsluCounter, 3779 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5121 SdHoareTripleChecker+Valid, 6321 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-22 23:16:54,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5121 Valid, 6321 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-11-22 23:16:54,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39034 states. [2021-11-22 23:16:57,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39034 to 24149. [2021-11-22 23:16:57,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24149 states, 24148 states have (on average 1.3136905747888024) internal successors, (31723), 24148 states have internal predecessors, (31723), 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) [2021-11-22 23:16:57,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24149 states to 24149 states and 31723 transitions. [2021-11-22 23:16:57,214 INFO L78 Accepts]: Start accepts. Automaton has 24149 states and 31723 transitions. Word has length 845 [2021-11-22 23:16:57,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:16:57,214 INFO L470 AbstractCegarLoop]: Abstraction has 24149 states and 31723 transitions. [2021-11-22 23:16:57,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 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) [2021-11-22 23:16:57,215 INFO L276 IsEmpty]: Start isEmpty. Operand 24149 states and 31723 transitions. [2021-11-22 23:16:57,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 848 [2021-11-22 23:16:57,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:16:57,246 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, 1, 1] [2021-11-22 23:16:57,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-22 23:16:57,453 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 [2021-11-22 23:16:57,453 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:16:57,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:16:57,454 INFO L85 PathProgramCache]: Analyzing trace with hash -533452980, now seen corresponding path program 1 times [2021-11-22 23:16:57,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:16:57,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941071454] [2021-11-22 23:16:57,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:16:57,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:16:57,496 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 23:16:57,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145146570] [2021-11-22 23:16:57,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:16:57,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:16:57,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 23:16:57,498 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) [2021-11-22 23:16:57,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-22 23:16:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:16:58,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 3010 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 23:16:58,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 23:16:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 72021 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 72013 trivial. 0 not checked. [2021-11-22 23:16:58,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 23:16:58,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:16:58,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941071454] [2021-11-22 23:16:58,925 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 23:16:58,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145146570] [2021-11-22 23:16:58,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145146570] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:16:58,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:16:58,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 23:16:58,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161094849] [2021-11-22 23:16:58,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:16:58,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 23:16:58,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:16:58,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 23:16:58,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 23:16:58,928 INFO L87 Difference]: Start difference. First operand 24149 states and 31723 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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) [2021-11-22 23:17:06,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:17:06,675 INFO L93 Difference]: Finished difference Result 71918 states and 94186 transitions. [2021-11-22 23:17:06,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 23:17:06,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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 847 [2021-11-22 23:17:06,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:17:06,771 INFO L225 Difference]: With dead ends: 71918 [2021-11-22 23:17:06,771 INFO L226 Difference]: Without dead ends: 52555 [2021-11-22 23:17:06,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 848 GetRequests, 845 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 23:17:06,796 INFO L933 BasicCegarLoop]: 3522 mSDtfsCounter, 2535 mSDsluCounter, 3424 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2535 SdHoareTripleChecker+Valid, 6946 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-22 23:17:06,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2535 Valid, 6946 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-22 23:17:06,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52555 states. [2021-11-22 23:17:09,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52555 to 24061. [2021-11-22 23:17:09,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24061 states, 24060 states have (on average 1.3040315876974231) internal successors, (31375), 24060 states have internal predecessors, (31375), 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) [2021-11-22 23:17:09,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24061 states to 24061 states and 31375 transitions. [2021-11-22 23:17:09,829 INFO L78 Accepts]: Start accepts. Automaton has 24061 states and 31375 transitions. Word has length 847 [2021-11-22 23:17:09,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:17:09,829 INFO L470 AbstractCegarLoop]: Abstraction has 24061 states and 31375 transitions. [2021-11-22 23:17:09,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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) [2021-11-22 23:17:09,829 INFO L276 IsEmpty]: Start isEmpty. Operand 24061 states and 31375 transitions. [2021-11-22 23:17:09,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 850 [2021-11-22 23:17:09,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:17:09,859 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, 1, 1] [2021-11-22 23:17:09,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-22 23:17:10,081 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 [2021-11-22 23:17:10,082 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:17:10,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:17:10,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1605848397, now seen corresponding path program 1 times [2021-11-22 23:17:10,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:17:10,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199983608] [2021-11-22 23:17:10,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:17:10,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:17:10,151 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 23:17:10,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1103486562] [2021-11-22 23:17:10,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:17:10,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:17:10,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 23:17:10,152 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) [2021-11-22 23:17:10,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-22 23:17:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:17:10,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 3011 conjuncts, 193 conjunts are in the unsatisfiable core [2021-11-22 23:17:10,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 23:17:22,677 INFO L134 CoverageAnalysis]: Checked inductivity of 72023 backedges. 0 proven. 72010 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-22 23:17:22,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... Killed by 15