./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--intel--igbvf--igbvf.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4d014703 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_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--intel--igbvf--igbvf.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 29069a6562e86cf14ec2af6e66fde431300c67391fef8a4bef75c88d837db303 --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-4d01470 [2021-11-02 18:24:37,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 18:24:37,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 18:24:38,043 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 18:24:38,043 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 18:24:38,045 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 18:24:38,045 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 18:24:38,048 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 18:24:38,049 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 18:24:38,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 18:24:38,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 18:24:38,052 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 18:24:38,053 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 18:24:38,056 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 18:24:38,057 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 18:24:38,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 18:24:38,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 18:24:38,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 18:24:38,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 18:24:38,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 18:24:38,067 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 18:24:38,068 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 18:24:38,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 18:24:38,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 18:24:38,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 18:24:38,075 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 18:24:38,075 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 18:24:38,076 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 18:24:38,076 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 18:24:38,077 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 18:24:38,077 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 18:24:38,078 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 18:24:38,078 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 18:24:38,079 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 18:24:38,080 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 18:24:38,081 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 18:24:38,081 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 18:24:38,082 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 18:24:38,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 18:24:38,082 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 18:24:38,083 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 18:24:38,084 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-02 18:24:38,104 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 18:24:38,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 18:24:38,107 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 18:24:38,107 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 18:24:38,108 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 18:24:38,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 18:24:38,108 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 18:24:38,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 18:24:38,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 18:24:38,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 18:24:38,109 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 18:24:38,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 18:24:38,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 18:24:38,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 18:24:38,110 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 18:24:38,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 18:24:38,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 18:24:38,110 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 18:24:38,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 18:24:38,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 18:24:38,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 18:24:38,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 18:24:38,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 18:24:38,111 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 18:24:38,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 18:24:38,112 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 18:24:38,112 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 18:24:38,113 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 18:24:38,113 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 18:24:38,113 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 29069a6562e86cf14ec2af6e66fde431300c67391fef8a4bef75c88d837db303 [2021-11-02 18:24:38,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 18:24:38,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 18:24:38,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 18:24:38,323 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 18:24:38,323 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 18:24:38,324 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--intel--igbvf--igbvf.ko-entry_point.cil.out.i [2021-11-02 18:24:38,380 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07d8cc54c/3f04962e5b0b47c58904e90decb663e5/FLAGf39ea8369 [2021-11-02 18:24:38,965 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 18:24:38,965 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--intel--igbvf--igbvf.ko-entry_point.cil.out.i [2021-11-02 18:24:39,006 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07d8cc54c/3f04962e5b0b47c58904e90decb663e5/FLAGf39ea8369 [2021-11-02 18:24:39,407 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07d8cc54c/3f04962e5b0b47c58904e90decb663e5 [2021-11-02 18:24:39,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 18:24:39,410 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 18:24:39,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 18:24:39,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 18:24:39,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 18:24:39,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 06:24:39" (1/1) ... [2021-11-02 18:24:39,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18707ec2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:24:39, skipping insertion in model container [2021-11-02 18:24:39,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 06:24:39" (1/1) ... [2021-11-02 18:24:39,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 18:24:39,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 18:24:40,106 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--intel--igbvf--igbvf.ko-entry_point.cil.out.i[183631,183644] [2021-11-02 18:24:41,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 18:24:41,682 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 18:24:41,738 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--intel--igbvf--igbvf.ko-entry_point.cil.out.i[183631,183644] [2021-11-02 18:24:41,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 18:24:42,176 INFO L208 MainTranslator]: Completed translation [2021-11-02 18:24:42,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:24:42 WrapperNode [2021-11-02 18:24:42,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 18:24:42,179 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 18:24:42,179 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 18:24:42,180 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 18:24:42,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:24:42" (1/1) ... [2021-11-02 18:24:42,293 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:24:42" (1/1) ... [2021-11-02 18:24:43,375 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 18:24:43,376 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 18:24:43,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 18:24:43,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 18:24:43,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:24:42" (1/1) ... [2021-11-02 18:24:43,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:24:42" (1/1) ... [2021-11-02 18:24:43,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:24:42" (1/1) ... [2021-11-02 18:24:43,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:24:42" (1/1) ... [2021-11-02 18:24:44,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:24:42" (1/1) ... [2021-11-02 18:24:44,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:24:42" (1/1) ... [2021-11-02 18:24:44,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:24:42" (1/1) ... [2021-11-02 18:24:44,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 18:24:44,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 18:24:44,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 18:24:44,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 18:24:44,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:24:42" (1/1) ... [2021-11-02 18:24:44,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 18:24:44,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 18:24:44,991 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) [2021-11-02 18:24:45,012 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 [2021-11-02 18:24:45,028 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_reset_hw_vf [2021-11-02 18:24:45,028 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_reset_hw_vf [2021-11-02 18:24:45,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u32 [2021-11-02 18:24:45,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 18:24:45,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-02 18:24:45,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-02 18:24:45,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 18:24:45,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u16 [2021-11-02 18:24:45,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 18:24:45,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 18:24:45,030 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_write_posted_mbx [2021-11-02 18:24:45,030 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_write_posted_mbx [2021-11-02 18:24:45,030 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_init_hw_vf [2021-11-02 18:24:45,030 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_init_hw_vf [2021-11-02 18:24:45,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 18:24:45,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 18:24:45,030 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_poll_for_ack [2021-11-02 18:24:45,030 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_poll_for_ack [2021-11-02 18:24:45,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-02 18:24:45,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-02 18:24:45,031 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_rar_set_vf [2021-11-02 18:24:45,031 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_rar_set_vf [2021-11-02 18:24:45,031 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_check_for_link_vf [2021-11-02 18:24:45,031 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_check_for_link_vf [2021-11-02 18:24:45,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 18:24:45,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 18:24:45,032 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~~s32~0 [2021-11-02 18:24:45,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~~s32~0 [2021-11-02 18:24:45,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 18:24:45,032 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~~u16~0~TO~~s32~0 [2021-11-02 18:24:45,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~~u16~0~TO~~s32~0 [2021-11-02 18:24:45,032 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_poll_for_msg [2021-11-02 18:24:45,032 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_poll_for_msg [2021-11-02 18:24:45,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 18:24:45,032 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_read_posted_mbx [2021-11-02 18:24:45,033 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_read_posted_mbx [2021-11-02 18:24:45,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 18:24:45,033 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-02 18:24:50,810 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 18:24:50,810 INFO L299 CfgBuilder]: Removed 8531 assume(true) statements. [2021-11-02 18:24:50,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 06:24:50 BoogieIcfgContainer [2021-11-02 18:24:50,820 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 18:24:50,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 18:24:50,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 18:24:50,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 18:24:50,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 06:24:39" (1/3) ... [2021-11-02 18:24:50,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5948ce99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 06:24:50, skipping insertion in model container [2021-11-02 18:24:50,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:24:42" (2/3) ... [2021-11-02 18:24:50,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5948ce99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 06:24:50, skipping insertion in model container [2021-11-02 18:24:50,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 06:24:50" (3/3) ... [2021-11-02 18:24:50,828 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--intel--igbvf--igbvf.ko-entry_point.cil.out.i [2021-11-02 18:24:50,832 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 18:24:50,832 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 18:24:50,902 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 18:24:50,907 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 [2021-11-02 18:24:50,909 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 18:24:51,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 8673 states, 8538 states have (on average 1.3836964160224876) internal successors, (11814), 8539 states have internal predecessors, (11814), 123 states have call successors, (123), 10 states have call predecessors, (123), 10 states have return successors, (123), 123 states have call predecessors, (123), 123 states have call successors, (123) [2021-11-02 18:24:51,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 18:24:51,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:24:51,026 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 18:24:51,026 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:24:51,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:24:51,031 INFO L85 PathProgramCache]: Analyzing trace with hash -589120283, now seen corresponding path program 1 times [2021-11-02 18:24:51,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:24:51,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044548147] [2021-11-02 18:24:51,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:24:51,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:24:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:24:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:24:51,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:24:51,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044548147] [2021-11-02 18:24:51,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044548147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:24:51,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:24:51,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 18:24:51,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978067195] [2021-11-02 18:24:51,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:24:51,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:24:51,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:24:51,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:24:51,638 INFO L87 Difference]: Start difference. First operand has 8673 states, 8538 states have (on average 1.3836964160224876) internal successors, (11814), 8539 states have internal predecessors, (11814), 123 states have call successors, (123), 10 states have call predecessors, (123), 10 states have return successors, (123), 123 states have call predecessors, (123), 123 states have call successors, (123) Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 18:24:55,154 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:25:16,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:25:16,856 INFO L93 Difference]: Finished difference Result 17343 states and 24117 transitions. [2021-11-02 18:25:16,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:25:16,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-02 18:25:16,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:25:16,911 INFO L225 Difference]: With dead ends: 17343 [2021-11-02 18:25:16,912 INFO L226 Difference]: Without dead ends: 8512 [2021-11-02 18:25:16,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.22ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:25:16,936 INFO L933 BasicCegarLoop]: 405 mSDtfsCounter, 0 mSDsluCounter, 11672 mSDsCounter, 0 mSdLazyCounter, 22952 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21232.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 22954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 53.93ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24559.98ms IncrementalHoareTripleChecker+Time [2021-11-02 18:25:16,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 810 Invalid, 22954 Unknown, 0 Unchecked, 53.93ms Time], IncrementalHoareTripleChecker [2 Valid, 22952 Invalid, 0 Unknown, 0 Unchecked, 24559.98ms Time] [2021-11-02 18:25:16,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8512 states. [2021-11-02 18:25:17,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8512 to 8512. [2021-11-02 18:25:17,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8512 states, 8378 states have (on average 1.3506803533062783) internal successors, (11316), 8378 states have internal predecessors, (11316), 123 states have call successors, (123), 10 states have call predecessors, (123), 10 states have return successors, (123), 123 states have call predecessors, (123), 123 states have call successors, (123) [2021-11-02 18:25:17,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8512 states to 8512 states and 11562 transitions. [2021-11-02 18:25:17,243 INFO L78 Accepts]: Start accepts. Automaton has 8512 states and 11562 transitions. Word has length 44 [2021-11-02 18:25:17,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:25:17,245 INFO L470 AbstractCegarLoop]: Abstraction has 8512 states and 11562 transitions. [2021-11-02 18:25:17,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 18:25:17,247 INFO L276 IsEmpty]: Start isEmpty. Operand 8512 states and 11562 transitions. [2021-11-02 18:25:17,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-02 18:25:17,251 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:25:17,252 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 18:25:17,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 18:25:17,253 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:25:17,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:25:17,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1515996053, now seen corresponding path program 1 times [2021-11-02 18:25:17,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:25:17,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765916012] [2021-11-02 18:25:17,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:25:17,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:25:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:25:17,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 18:25:17,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:25:17,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765916012] [2021-11-02 18:25:17,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765916012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:25:17,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:25:17,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 18:25:17,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218978090] [2021-11-02 18:25:17,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:25:17,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:25:17,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:25:17,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:25:17,497 INFO L87 Difference]: Start difference. First operand 8512 states and 11562 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2021-11-02 18:25:40,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:25:40,818 INFO L93 Difference]: Finished difference Result 16988 states and 23081 transitions. [2021-11-02 18:25:40,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:25:40,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 46 [2021-11-02 18:25:40,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:25:40,859 INFO L225 Difference]: With dead ends: 16988 [2021-11-02 18:25:40,860 INFO L226 Difference]: Without dead ends: 8513 [2021-11-02 18:25:40,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.82ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:25:40,886 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 0 mSDsluCounter, 11350 mSDsCounter, 0 mSdLazyCounter, 22627 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19717.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 22627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 51.16ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22889.03ms IncrementalHoareTripleChecker+Time [2021-11-02 18:25:40,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 492 Invalid, 22627 Unknown, 0 Unchecked, 51.16ms Time], IncrementalHoareTripleChecker [0 Valid, 22627 Invalid, 0 Unknown, 0 Unchecked, 22889.03ms Time] [2021-11-02 18:25:40,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8513 states. [2021-11-02 18:25:41,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8513 to 8513. [2021-11-02 18:25:41,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8513 states, 8379 states have (on average 1.3506385010144408) internal successors, (11317), 8379 states have internal predecessors, (11317), 123 states have call successors, (123), 10 states have call predecessors, (123), 10 states have return successors, (123), 123 states have call predecessors, (123), 123 states have call successors, (123) [2021-11-02 18:25:41,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8513 states to 8513 states and 11563 transitions. [2021-11-02 18:25:41,118 INFO L78 Accepts]: Start accepts. Automaton has 8513 states and 11563 transitions. Word has length 46 [2021-11-02 18:25:41,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:25:41,118 INFO L470 AbstractCegarLoop]: Abstraction has 8513 states and 11563 transitions. [2021-11-02 18:25:41,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2021-11-02 18:25:41,119 INFO L276 IsEmpty]: Start isEmpty. Operand 8513 states and 11563 transitions. [2021-11-02 18:25:41,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-02 18:25:41,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:25:41,128 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 18:25:41,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 18:25:41,129 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:25:41,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:25:41,130 INFO L85 PathProgramCache]: Analyzing trace with hash 630270599, now seen corresponding path program 1 times [2021-11-02 18:25:41,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:25:41,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255548552] [2021-11-02 18:25:41,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:25:41,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:25:41,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:25:41,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 18:25:41,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:25:41,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255548552] [2021-11-02 18:25:41,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255548552] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:25:41,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:25:41,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 18:25:41,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407379933] [2021-11-02 18:25:41,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:25:41,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:25:41,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:25:41,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:25:41,345 INFO L87 Difference]: Start difference. First operand 8513 states and 11563 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2021-11-02 18:25:45,118 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:25:47,140 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:26:08,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:26:08,992 INFO L93 Difference]: Finished difference Result 16988 states and 23081 transitions. [2021-11-02 18:26:08,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:26:08,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 47 [2021-11-02 18:26:08,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:26:09,022 INFO L225 Difference]: With dead ends: 16988 [2021-11-02 18:26:09,023 INFO L226 Difference]: Without dead ends: 8515 [2021-11-02 18:26:09,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.28ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:26:09,047 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 0 mSDsluCounter, 11350 mSDsCounter, 0 mSdLazyCounter, 22625 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23789.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 22628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.55ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22625 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27249.71ms IncrementalHoareTripleChecker+Time [2021-11-02 18:26:09,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 492 Invalid, 22628 Unknown, 0 Unchecked, 37.55ms Time], IncrementalHoareTripleChecker [2 Valid, 22625 Invalid, 1 Unknown, 0 Unchecked, 27249.71ms Time] [2021-11-02 18:26:09,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8515 states. [2021-11-02 18:26:09,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8515 to 8515. [2021-11-02 18:26:09,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8515 states, 8381 states have (on average 1.3505548263930318) internal successors, (11319), 8381 states have internal predecessors, (11319), 123 states have call successors, (123), 10 states have call predecessors, (123), 10 states have return successors, (123), 123 states have call predecessors, (123), 123 states have call successors, (123) [2021-11-02 18:26:09,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8515 states to 8515 states and 11565 transitions. [2021-11-02 18:26:09,225 INFO L78 Accepts]: Start accepts. Automaton has 8515 states and 11565 transitions. Word has length 47 [2021-11-02 18:26:09,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:26:09,225 INFO L470 AbstractCegarLoop]: Abstraction has 8515 states and 11565 transitions. [2021-11-02 18:26:09,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2021-11-02 18:26:09,225 INFO L276 IsEmpty]: Start isEmpty. Operand 8515 states and 11565 transitions. [2021-11-02 18:26:09,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-02 18:26:09,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:26:09,227 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 18:26:09,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 18:26:09,228 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:26:09,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:26:09,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1248422027, now seen corresponding path program 1 times [2021-11-02 18:26:09,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:26:09,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911204737] [2021-11-02 18:26:09,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:26:09,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:26:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:26:09,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 18:26:09,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:26:09,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911204737] [2021-11-02 18:26:09,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911204737] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:26:09,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:26:09,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 18:26:09,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278395732] [2021-11-02 18:26:09,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:26:09,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:26:09,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:26:09,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:26:09,448 INFO L87 Difference]: Start difference. First operand 8515 states and 11565 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2021-11-02 18:26:48,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:26:48,247 INFO L93 Difference]: Finished difference Result 25389 states and 34507 transitions. [2021-11-02 18:26:48,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:26:48,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 49 [2021-11-02 18:26:48,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:26:48,298 INFO L225 Difference]: With dead ends: 25389 [2021-11-02 18:26:48,298 INFO L226 Difference]: Without dead ends: 16923 [2021-11-02 18:26:48,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.41ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:26:48,323 INFO L933 BasicCegarLoop]: 369 mSDtfsCounter, 11426 mSDsluCounter, 11545 mSDsCounter, 0 mSdLazyCounter, 22622 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31786.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11426 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 22625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 61.94ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37929.15ms IncrementalHoareTripleChecker+Time [2021-11-02 18:26:48,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11426 Valid, 615 Invalid, 22625 Unknown, 0 Unchecked, 61.94ms Time], IncrementalHoareTripleChecker [3 Valid, 22622 Invalid, 0 Unknown, 0 Unchecked, 37929.15ms Time] [2021-11-02 18:26:48,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16923 states. [2021-11-02 18:26:48,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16923 to 16923. [2021-11-02 18:26:48,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16923 states, 16656 states have (on average 1.3512848222862632) internal successors, (22507), 16656 states have internal predecessors, (22507), 246 states have call successors, (246), 20 states have call predecessors, (246), 20 states have return successors, (246), 246 states have call predecessors, (246), 246 states have call successors, (246) [2021-11-02 18:26:48,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16923 states to 16923 states and 22999 transitions. [2021-11-02 18:26:48,690 INFO L78 Accepts]: Start accepts. Automaton has 16923 states and 22999 transitions. Word has length 49 [2021-11-02 18:26:48,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:26:48,692 INFO L470 AbstractCegarLoop]: Abstraction has 16923 states and 22999 transitions. [2021-11-02 18:26:48,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2021-11-02 18:26:48,692 INFO L276 IsEmpty]: Start isEmpty. Operand 16923 states and 22999 transitions. [2021-11-02 18:26:48,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 18:26:48,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:26:48,696 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 18:26:48,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 18:26:48,696 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:26:48,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:26:48,696 INFO L85 PathProgramCache]: Analyzing trace with hash 590966936, now seen corresponding path program 1 times [2021-11-02 18:26:48,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:26:48,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997382229] [2021-11-02 18:26:48,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:26:48,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:26:48,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:26:48,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 18:26:48,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:26:48,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997382229] [2021-11-02 18:26:48,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997382229] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:26:48,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:26:48,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 18:26:48,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402992992] [2021-11-02 18:26:48,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 18:26:48,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:26:48,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 18:26:48,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 18:26:48,899 INFO L87 Difference]: Start difference. First operand 16923 states and 22999 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 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) [2021-11-02 18:26:53,459 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:27:18,387 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:27:53,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:27:53,741 INFO L93 Difference]: Finished difference Result 33797 states and 45938 transitions. [2021-11-02 18:27:53,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 18:27:53,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 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 52 [2021-11-02 18:27:53,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:27:53,825 INFO L225 Difference]: With dead ends: 33797 [2021-11-02 18:27:53,825 INFO L226 Difference]: Without dead ends: 33791 [2021-11-02 18:27:53,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.01ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 18:27:53,848 INFO L933 BasicCegarLoop]: 374 mSDtfsCounter, 11498 mSDsluCounter, 35032 mSDsCounter, 0 mSdLazyCounter, 45999 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53528.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11498 SdHoareTripleChecker+Valid, 1368 SdHoareTripleChecker+Invalid, 46000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 115.73ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 63628.79ms IncrementalHoareTripleChecker+Time [2021-11-02 18:27:53,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11498 Valid, 1368 Invalid, 46000 Unknown, 0 Unchecked, 115.73ms Time], IncrementalHoareTripleChecker [1 Valid, 45999 Invalid, 0 Unknown, 0 Unchecked, 63628.79ms Time] [2021-11-02 18:27:53,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33791 states. [2021-11-02 18:27:54,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33791 to 33591. [2021-11-02 18:27:54,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33591 states, 33058 states have (on average 1.3520781656482546) internal successors, (44697), 33058 states have internal predecessors, (44697), 492 states have call successors, (492), 40 states have call predecessors, (492), 40 states have return successors, (492), 492 states have call predecessors, (492), 492 states have call successors, (492) [2021-11-02 18:27:54,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33591 states to 33591 states and 45681 transitions. [2021-11-02 18:27:54,467 INFO L78 Accepts]: Start accepts. Automaton has 33591 states and 45681 transitions. Word has length 52 [2021-11-02 18:27:54,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:27:54,468 INFO L470 AbstractCegarLoop]: Abstraction has 33591 states and 45681 transitions. [2021-11-02 18:27:54,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 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) [2021-11-02 18:27:54,468 INFO L276 IsEmpty]: Start isEmpty. Operand 33591 states and 45681 transitions. [2021-11-02 18:27:54,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-02 18:27:54,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:27:54,522 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 18:27:54,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 18:27:54,523 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:27:54,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:27:54,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1852462552, now seen corresponding path program 1 times [2021-11-02 18:27:54,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:27:54,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896541591] [2021-11-02 18:27:54,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:27:54,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:27:54,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:27:54,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-02 18:27:54,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:27:54,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-02 18:27:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:27:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 18:27:54,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:27:54,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896541591] [2021-11-02 18:27:54,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896541591] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:27:54,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:27:54,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 18:27:54,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142500531] [2021-11-02 18:27:54,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 18:27:54,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:27:54,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 18:27:54,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 18:27:54,762 INFO L87 Difference]: Start difference. First operand 33591 states and 45681 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 18:28:08,316 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:28:54,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:28:54,666 INFO L93 Difference]: Finished difference Result 97231 states and 133109 transitions. [2021-11-02 18:28:54,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 18:28:54,666 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 160 [2021-11-02 18:28:54,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:28:54,868 INFO L225 Difference]: With dead ends: 97231 [2021-11-02 18:28:54,868 INFO L226 Difference]: Without dead ends: 63689 [2021-11-02 18:28:54,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.04ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 18:28:54,960 INFO L933 BasicCegarLoop]: 482 mSDtfsCounter, 10439 mSDsluCounter, 18751 mSDsCounter, 0 mSdLazyCounter, 34146 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47561.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10473 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 34436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 113.57ms SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 34146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58339.76ms IncrementalHoareTripleChecker+Time [2021-11-02 18:28:54,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10473 Valid, 948 Invalid, 34436 Unknown, 0 Unchecked, 113.57ms Time], IncrementalHoareTripleChecker [290 Valid, 34146 Invalid, 0 Unknown, 0 Unchecked, 58339.76ms Time] [2021-11-02 18:28:55,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63689 states. [2021-11-02 18:28:55,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63689 to 63183. [2021-11-02 18:28:56,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63183 states, 62182 states have (on average 1.3529799620468945) internal successors, (84131), 62182 states have internal predecessors, (84131), 920 states have call successors, (920), 80 states have call predecessors, (920), 80 states have return successors, (920), 920 states have call predecessors, (920), 920 states have call successors, (920) [2021-11-02 18:28:56,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63183 states to 63183 states and 85971 transitions. [2021-11-02 18:28:56,230 INFO L78 Accepts]: Start accepts. Automaton has 63183 states and 85971 transitions. Word has length 160 [2021-11-02 18:28:56,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:28:56,230 INFO L470 AbstractCegarLoop]: Abstraction has 63183 states and 85971 transitions. [2021-11-02 18:28:56,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 18:28:56,231 INFO L276 IsEmpty]: Start isEmpty. Operand 63183 states and 85971 transitions. [2021-11-02 18:28:56,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-02 18:28:56,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:28:56,302 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 18:28:56,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 18:28:56,302 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:28:56,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:28:56,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1991306359, now seen corresponding path program 1 times [2021-11-02 18:28:56,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:28:56,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494901411] [2021-11-02 18:28:56,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:28:56,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:28:56,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:28:56,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-02 18:28:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:28:56,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-02 18:28:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:28:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 18:28:56,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:28:56,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494901411] [2021-11-02 18:28:56,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494901411] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:28:56,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:28:56,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 18:28:56,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700120506] [2021-11-02 18:28:56,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 18:28:56,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:28:56,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 18:28:56,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 18:28:56,484 INFO L87 Difference]: Start difference. First operand 63183 states and 85971 transitions. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 18:29:02,257 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:29:09,065 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:29:56,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:29:56,907 INFO L93 Difference]: Finished difference Result 170171 states and 233287 transitions. [2021-11-02 18:29:56,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 18:29:56,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 176 [2021-11-02 18:29:56,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:29:57,153 INFO L225 Difference]: With dead ends: 170171 [2021-11-02 18:29:57,153 INFO L226 Difference]: Without dead ends: 107037 [2021-11-02 18:29:57,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.91ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 18:29:57,242 INFO L933 BasicCegarLoop]: 434 mSDtfsCounter, 8305 mSDsluCounter, 19497 mSDsCounter, 0 mSdLazyCounter, 36743 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48542.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8348 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 37000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 89.36ms SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 36743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58256.43ms IncrementalHoareTripleChecker+Time [2021-11-02 18:29:57,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8348 Valid, 832 Invalid, 37000 Unknown, 0 Unchecked, 89.36ms Time], IncrementalHoareTripleChecker [257 Valid, 36743 Invalid, 0 Unknown, 0 Unchecked, 58256.43ms Time] [2021-11-02 18:29:57,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107037 states. [2021-11-02 18:29:59,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107037 to 106199. [2021-11-02 18:29:59,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106199 states, 104462 states have (on average 1.3560816373418085) internal successors, (141659), 104462 states have internal predecessors, (141659), 1576 states have call successors, (1576), 160 states have call predecessors, (1576), 160 states have return successors, (1576), 1576 states have call predecessors, (1576), 1576 states have call successors, (1576) [2021-11-02 18:29:59,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106199 states to 106199 states and 144811 transitions. [2021-11-02 18:29:59,800 INFO L78 Accepts]: Start accepts. Automaton has 106199 states and 144811 transitions. Word has length 176 [2021-11-02 18:29:59,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:29:59,802 INFO L470 AbstractCegarLoop]: Abstraction has 106199 states and 144811 transitions. [2021-11-02 18:29:59,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 18:29:59,802 INFO L276 IsEmpty]: Start isEmpty. Operand 106199 states and 144811 transitions. [2021-11-02 18:29:59,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-02 18:29:59,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:29:59,910 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 18:29:59,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 18:29:59,911 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:29:59,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:29:59,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1894705921, now seen corresponding path program 1 times [2021-11-02 18:29:59,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:29:59,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430330901] [2021-11-02 18:29:59,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:29:59,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:29:59,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:30:00,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-02 18:30:00,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:30:00,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-11-02 18:30:00,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:30:00,248 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 18:30:00,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:30:00,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430330901] [2021-11-02 18:30:00,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430330901] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:30:00,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:30:00,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 18:30:00,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682010896] [2021-11-02 18:30:00,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 18:30:00,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:30:00,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 18:30:00,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 18:30:00,250 INFO L87 Difference]: Start difference. First operand 106199 states and 144811 transitions. Second operand has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 18:30:33,335 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-02 18:31:21,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:31:21,120 INFO L93 Difference]: Finished difference Result 263015 states and 360831 transitions. [2021-11-02 18:31:21,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 18:31:21,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 196 [2021-11-02 18:31:21,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:31:21,516 INFO L225 Difference]: With dead ends: 263015 [2021-11-02 18:31:21,516 INFO L226 Difference]: Without dead ends: 156865 [2021-11-02 18:31:21,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.32ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 18:31:21,681 INFO L933 BasicCegarLoop]: 550 mSDtfsCounter, 10636 mSDsluCounter, 22619 mSDsCounter, 0 mSdLazyCounter, 47067 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64667.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10667 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 47295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 109.49ms SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 47067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78065.53ms IncrementalHoareTripleChecker+Time [2021-11-02 18:31:21,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10667 Valid, 989 Invalid, 47295 Unknown, 0 Unchecked, 109.49ms Time], IncrementalHoareTripleChecker [228 Valid, 47067 Invalid, 0 Unknown, 0 Unchecked, 78065.53ms Time] [2021-11-02 18:31:21,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156865 states. [2021-11-02 18:31:24,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156865 to 155527. [2021-11-02 18:31:24,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155527 states, 152986 states have (on average 1.3564313074398964) internal successors, (207515), 152986 states have internal predecessors, (207515), 2300 states have call successors, (2300), 240 states have call predecessors, (2300), 240 states have return successors, (2300), 2300 states have call predecessors, (2300), 2300 states have call successors, (2300) [2021-11-02 18:31:24,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155527 states to 155527 states and 212115 transitions. [2021-11-02 18:31:24,918 INFO L78 Accepts]: Start accepts. Automaton has 155527 states and 212115 transitions. Word has length 196 [2021-11-02 18:31:24,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:31:24,918 INFO L470 AbstractCegarLoop]: Abstraction has 155527 states and 212115 transitions. [2021-11-02 18:31:24,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 18:31:24,918 INFO L276 IsEmpty]: Start isEmpty. Operand 155527 states and 212115 transitions. [2021-11-02 18:31:25,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-02 18:31:25,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:31:25,315 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 18:31:25,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 18:31:25,316 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:31:25,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:31:25,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1528207997, now seen corresponding path program 1 times [2021-11-02 18:31:25,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:31:25,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915693604] [2021-11-02 18:31:25,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:31:25,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:31:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:31:25,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-02 18:31:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:31:25,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-02 18:31:25,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:31:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-02 18:31:25,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:31:25,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915693604] [2021-11-02 18:31:25,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915693604] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:31:25,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:31:25,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 18:31:25,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262893928] [2021-11-02 18:31:25,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 18:31:25,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:31:25,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 18:31:25,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 18:31:25,527 INFO L87 Difference]: Start difference. First operand 155527 states and 212115 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 18:32:45,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:32:45,312 INFO L93 Difference]: Finished difference Result 468031 states and 641953 transitions. [2021-11-02 18:32:45,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 18:32:45,316 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 196 [2021-11-02 18:32:45,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:32:46,187 INFO L225 Difference]: With dead ends: 468031 [2021-11-02 18:32:46,187 INFO L226 Difference]: Without dead ends: 312553 [2021-11-02 18:32:46,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.48ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 18:32:46,441 INFO L933 BasicCegarLoop]: 497 mSDtfsCounter, 11531 mSDsluCounter, 18736 mSDsCounter, 0 mSdLazyCounter, 34338 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60856.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11580 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 34691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 96.25ms SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 34338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74794.47ms IncrementalHoareTripleChecker+Time [2021-11-02 18:32:46,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11580 Valid, 958 Invalid, 34691 Unknown, 0 Unchecked, 96.25ms Time], IncrementalHoareTripleChecker [353 Valid, 34338 Invalid, 0 Unknown, 0 Unchecked, 74794.47ms Time] [2021-11-02 18:32:46,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312553 states. [2021-11-02 18:32:52,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312553 to 310051. [2021-11-02 18:32:53,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310051 states, 304970 states have (on average 1.3529363543955144) internal successors, (412605), 304970 states have internal predecessors, (412605), 4600 states have call successors, (4600), 480 states have call predecessors, (4600), 480 states have return successors, (4600), 4600 states have call predecessors, (4600), 4600 states have call successors, (4600) [2021-11-02 18:32:54,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310051 states to 310051 states and 421805 transitions. [2021-11-02 18:32:54,278 INFO L78 Accepts]: Start accepts. Automaton has 310051 states and 421805 transitions. Word has length 196 [2021-11-02 18:32:54,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:32:54,278 INFO L470 AbstractCegarLoop]: Abstraction has 310051 states and 421805 transitions. [2021-11-02 18:32:54,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 18:32:54,279 INFO L276 IsEmpty]: Start isEmpty. Operand 310051 states and 421805 transitions. [2021-11-02 18:32:54,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-02 18:32:54,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:32:54,685 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 18:32:54,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 18:32:54,685 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:32:54,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:32:54,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1843224868, now seen corresponding path program 1 times [2021-11-02 18:32:54,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:32:54,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342979668] [2021-11-02 18:32:54,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:32:54,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:32:55,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:32:55,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-02 18:32:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:32:55,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-11-02 18:32:55,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:32:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-02 18:32:55,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:32:55,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342979668] [2021-11-02 18:32:55,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342979668] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:32:55,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:32:55,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 18:32:55,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109830935] [2021-11-02 18:32:55,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 18:32:55,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:32:55,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 18:32:55,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 18:32:55,187 INFO L87 Difference]: Start difference. First operand 310051 states and 421805 transitions. Second operand has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 18:33:03,048 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:34:42,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:34:42,210 INFO L93 Difference]: Finished difference Result 934287 states and 1279023 transitions. [2021-11-02 18:34:42,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 18:34:42,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 197 [2021-11-02 18:34:42,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:34:44,399 INFO L225 Difference]: With dead ends: 934287 [2021-11-02 18:34:44,399 INFO L226 Difference]: Without dead ends: 624285 [2021-11-02 18:34:45,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.71ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 18:34:45,205 INFO L933 BasicCegarLoop]: 492 mSDtfsCounter, 11560 mSDsluCounter, 18645 mSDsCounter, 0 mSdLazyCounter, 34132 mSolverCounterSat, 354 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73474.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11611 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 34487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 121.59ms SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 34132 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 96254.79ms IncrementalHoareTripleChecker+Time [2021-11-02 18:34:45,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11611 Valid, 947 Invalid, 34487 Unknown, 0 Unchecked, 121.59ms Time], IncrementalHoareTripleChecker [354 Valid, 34132 Invalid, 1 Unknown, 0 Unchecked, 96254.79ms Time] [2021-11-02 18:34:45,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624285 states.