/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 13:11:49,930 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 13:11:49,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 13:11:49,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 13:11:49,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 13:11:49,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 13:11:49,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 13:11:49,976 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 13:11:49,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 13:11:49,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 13:11:49,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 13:11:49,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 13:11:49,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 13:11:49,983 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 13:11:49,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 13:11:49,986 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 13:11:49,987 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 13:11:49,988 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 13:11:49,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 13:11:49,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 13:11:49,995 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 13:11:49,996 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 13:11:49,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 13:11:50,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 13:11:50,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 13:11:50,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 13:11:50,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 13:11:50,016 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 13:11:50,017 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 13:11:50,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 13:11:50,018 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 13:11:50,019 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 13:11:50,020 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 13:11:50,021 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 13:11:50,022 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 13:11:50,023 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 13:11:50,023 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 13:11:50,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 13:11:50,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 13:11:50,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 13:11:50,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 13:11:50,027 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 13:11:50,067 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 13:11:50,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 13:11:50,072 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 13:11:50,073 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 13:11:50,073 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 13:11:50,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 13:11:50,074 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 13:11:50,074 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 13:11:50,074 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 13:11:50,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 13:11:50,075 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 13:11:50,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 13:11:50,075 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 13:11:50,075 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 13:11:50,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 13:11:50,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 13:11:50,076 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 13:11:50,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:11:50,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 13:11:50,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 13:11:50,079 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 13:11:50,079 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 13:11:50,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 13:11:50,079 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 13:11:50,080 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 13:11:50,080 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 13:11:50,454 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 13:11:50,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 13:11:50,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 13:11:50,496 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 13:11:50,497 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 13:11:50,498 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i [2020-12-22 13:11:50,590 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25ac9c5b7/f53d72cdc16a498eb9ec738e915039a3/FLAG93673cfb8 [2020-12-22 13:11:51,660 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 13:11:51,661 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i [2020-12-22 13:11:51,711 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25ac9c5b7/f53d72cdc16a498eb9ec738e915039a3/FLAG93673cfb8 [2020-12-22 13:11:52,043 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25ac9c5b7/f53d72cdc16a498eb9ec738e915039a3 [2020-12-22 13:11:52,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 13:11:52,049 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 13:11:52,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 13:11:52,052 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 13:11:52,056 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 13:11:52,057 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:11:52" (1/1) ... [2020-12-22 13:11:52,058 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13151579 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:52, skipping insertion in model container [2020-12-22 13:11:52,058 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:11:52" (1/1) ... [2020-12-22 13:11:52,069 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 13:11:52,187 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 13:11:53,344 WARN L226 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-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i[182154,182167] [2020-12-22 13:11:54,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:11:54,029 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 13:11:54,274 WARN L226 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-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i[182154,182167] [2020-12-22 13:11:54,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:11:54,765 INFO L208 MainTranslator]: Completed translation [2020-12-22 13:11:54,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:54 WrapperNode [2020-12-22 13:11:54,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 13:11:54,768 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 13:11:54,768 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 13:11:54,768 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 13:11:54,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:54" (1/1) ... [2020-12-22 13:11:54,881 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:54" (1/1) ... [2020-12-22 13:11:55,142 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 13:11:55,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 13:11:55,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 13:11:55,144 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 13:11:55,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:54" (1/1) ... [2020-12-22 13:11:55,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:54" (1/1) ... [2020-12-22 13:11:55,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:54" (1/1) ... [2020-12-22 13:11:55,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:54" (1/1) ... [2020-12-22 13:11:55,293 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:54" (1/1) ... [2020-12-22 13:11:55,328 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:54" (1/1) ... [2020-12-22 13:11:55,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:54" (1/1) ... [2020-12-22 13:11:55,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 13:11:55,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 13:11:55,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 13:11:55,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 13:11:55,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:11:55,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-12-22 13:11:55,523 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-12-22 13:11:55,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-12-22 13:11:55,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 13:11:55,524 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2020-12-22 13:11:55,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2020-12-22 13:11:55,524 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_submit_rx_urb_fwload [2020-12-22 13:11:55,525 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_submit_rx_urb_fwload [2020-12-22 13:11:55,525 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_submit_rx_urb [2020-12-22 13:11:55,525 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_submit_rx_urb [2020-12-22 13:11:55,525 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_receive_fwload [2020-12-22 13:11:55,525 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_receive_fwload [2020-12-22 13:11:55,525 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_send_fw_pkt [2020-12-22 13:11:55,526 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_send_fw_pkt [2020-12-22 13:11:55,526 INFO L130 BoogieDeclarations]: Found specification of procedure __if_usb_submit_rx_urb [2020-12-22 13:11:55,526 INFO L138 BoogieDeclarations]: Found implementation of procedure __if_usb_submit_rx_urb [2020-12-22 13:11:55,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 13:11:55,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 13:11:55,526 INFO L130 BoogieDeclarations]: Found specification of procedure usb_tx_block [2020-12-22 13:11:55,527 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_tx_block [2020-12-22 13:11:55,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 13:11:55,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 13:11:55,527 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2020-12-22 13:11:55,527 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2020-12-22 13:11:55,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2020-12-22 13:11:55,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 13:11:55,528 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_13 [2020-12-22 13:11:55,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_13 [2020-12-22 13:11:55,528 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_15 [2020-12-22 13:11:55,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_15 [2020-12-22 13:11:55,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 13:11:55,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 13:11:55,529 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_receive [2020-12-22 13:11:55,529 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_receive [2020-12-22 13:11:55,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 13:11:55,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-12-22 13:11:55,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 13:11:55,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 13:12:07,589 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 13:12:07,590 INFO L299 CfgBuilder]: Removed 687 assume(true) statements. [2020-12-22 13:12:07,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:12:07 BoogieIcfgContainer [2020-12-22 13:12:07,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 13:12:07,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 13:12:07,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 13:12:07,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 13:12:07,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:11:52" (1/3) ... [2020-12-22 13:12:07,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed0230d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:12:07, skipping insertion in model container [2020-12-22 13:12:07,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:54" (2/3) ... [2020-12-22 13:12:07,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed0230d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:12:07, skipping insertion in model container [2020-12-22 13:12:07,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:12:07" (3/3) ... [2020-12-22 13:12:07,606 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i [2020-12-22 13:12:07,613 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 13:12:07,620 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-22 13:12:07,641 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-22 13:12:07,677 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 13:12:07,677 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 13:12:07,677 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 13:12:07,678 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 13:12:07,678 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 13:12:07,678 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 13:12:07,678 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 13:12:07,678 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 13:12:07,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states. [2020-12-22 13:12:07,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 13:12:07,728 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:12:07,729 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:12:07,730 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:12:07,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:12:07,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1408021568, now seen corresponding path program 1 times [2020-12-22 13:12:07,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:12:07,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217490854] [2020-12-22 13:12:07,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:12:08,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:08,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:12:08,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217490854] [2020-12-22 13:12:08,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:12:08,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:12:08,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503837770] [2020-12-22 13:12:08,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:12:08,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:12:08,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:12:08,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:12:08,637 INFO L87 Difference]: Start difference. First operand 1205 states. Second operand 3 states. [2020-12-22 13:12:08,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:12:08,870 INFO L93 Difference]: Finished difference Result 2406 states and 3653 transitions. [2020-12-22 13:12:08,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:12:08,872 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-12-22 13:12:08,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:12:08,906 INFO L225 Difference]: With dead ends: 2406 [2020-12-22 13:12:08,906 INFO L226 Difference]: Without dead ends: 1191 [2020-12-22 13:12:08,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:12:08,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2020-12-22 13:12:09,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1191. [2020-12-22 13:12:09,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1191 states. [2020-12-22 13:12:09,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 1774 transitions. [2020-12-22 13:12:09,063 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 1774 transitions. Word has length 18 [2020-12-22 13:12:09,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:12:09,064 INFO L481 AbstractCegarLoop]: Abstraction has 1191 states and 1774 transitions. [2020-12-22 13:12:09,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:12:09,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 1774 transitions. [2020-12-22 13:12:09,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 13:12:09,068 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:12:09,068 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:12:09,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 13:12:09,069 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:12:09,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:12:09,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1848085822, now seen corresponding path program 1 times [2020-12-22 13:12:09,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:12:09,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177004113] [2020-12-22 13:12:09,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:12:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:09,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:12:09,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177004113] [2020-12-22 13:12:09,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:12:09,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:12:09,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996153956] [2020-12-22 13:12:09,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:12:09,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:12:09,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:12:09,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:12:09,424 INFO L87 Difference]: Start difference. First operand 1191 states and 1774 transitions. Second operand 3 states. [2020-12-22 13:12:11,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:12:11,742 INFO L93 Difference]: Finished difference Result 3522 states and 5266 transitions. [2020-12-22 13:12:11,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:12:11,743 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-22 13:12:11,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:12:11,760 INFO L225 Difference]: With dead ends: 3522 [2020-12-22 13:12:11,761 INFO L226 Difference]: Without dead ends: 2343 [2020-12-22 13:12:11,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:12:11,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2343 states. [2020-12-22 13:12:11,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2343 to 2343. [2020-12-22 13:12:11,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2343 states. [2020-12-22 13:12:11,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 3503 transitions. [2020-12-22 13:12:11,854 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 3503 transitions. Word has length 19 [2020-12-22 13:12:11,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:12:11,854 INFO L481 AbstractCegarLoop]: Abstraction has 2343 states and 3503 transitions. [2020-12-22 13:12:11,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:12:11,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 3503 transitions. [2020-12-22 13:12:11,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 13:12:11,857 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:12:11,858 INFO L422 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] [2020-12-22 13:12:11,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 13:12:11,858 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:12:11,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:12:11,859 INFO L82 PathProgramCache]: Analyzing trace with hash -251512228, now seen corresponding path program 1 times [2020-12-22 13:12:11,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:12:11,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224209694] [2020-12-22 13:12:11,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:12:12,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:12:12,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224209694] [2020-12-22 13:12:12,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:12:12,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:12:12,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285859823] [2020-12-22 13:12:12,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:12:12,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:12:12,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:12:12,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:12:12,194 INFO L87 Difference]: Start difference. First operand 2343 states and 3503 transitions. Second operand 3 states. [2020-12-22 13:12:12,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:12:12,350 INFO L93 Difference]: Finished difference Result 2373 states and 3531 transitions. [2020-12-22 13:12:12,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:12:12,351 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-12-22 13:12:12,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:12:12,365 INFO L225 Difference]: With dead ends: 2373 [2020-12-22 13:12:12,366 INFO L226 Difference]: Without dead ends: 2358 [2020-12-22 13:12:12,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:12:12,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2020-12-22 13:12:12,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 2343. [2020-12-22 13:12:12,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2343 states. [2020-12-22 13:12:12,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 3502 transitions. [2020-12-22 13:12:12,540 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 3502 transitions. Word has length 26 [2020-12-22 13:12:12,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:12:12,540 INFO L481 AbstractCegarLoop]: Abstraction has 2343 states and 3502 transitions. [2020-12-22 13:12:12,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:12:12,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 3502 transitions. [2020-12-22 13:12:12,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 13:12:12,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:12:12,543 INFO L422 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] [2020-12-22 13:12:12,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 13:12:12,544 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:12:12,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:12:12,545 INFO L82 PathProgramCache]: Analyzing trace with hash -251452646, now seen corresponding path program 1 times [2020-12-22 13:12:12,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:12:12,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083283151] [2020-12-22 13:12:12,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:12:12,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:13,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:12:13,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083283151] [2020-12-22 13:12:13,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462336139] [2020-12-22 13:12:13,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:12:14,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:14,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 2399 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:12:14,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:12:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:12:14,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:12:14,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-22 13:12:14,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970885941] [2020-12-22 13:12:14,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 13:12:14,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:12:14,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 13:12:14,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:12:14,521 INFO L87 Difference]: Start difference. First operand 2343 states and 3502 transitions. Second operand 6 states. [2020-12-22 13:12:14,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:12:14,664 INFO L93 Difference]: Finished difference Result 4677 states and 6994 transitions. [2020-12-22 13:12:14,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:12:14,665 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-12-22 13:12:14,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:12:14,679 INFO L225 Difference]: With dead ends: 4677 [2020-12-22 13:12:14,679 INFO L226 Difference]: Without dead ends: 2344 [2020-12-22 13:12:14,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:12:14,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2020-12-22 13:12:14,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 2344. [2020-12-22 13:12:14,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2344 states. [2020-12-22 13:12:14,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 3503 transitions. [2020-12-22 13:12:14,783 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 3503 transitions. Word has length 26 [2020-12-22 13:12:14,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:12:14,784 INFO L481 AbstractCegarLoop]: Abstraction has 2344 states and 3503 transitions. [2020-12-22 13:12:14,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 13:12:14,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 3503 transitions. [2020-12-22 13:12:14,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 13:12:14,785 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:12:14,786 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:12:15,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:12:15,002 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:12:15,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:12:15,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1191901544, now seen corresponding path program 2 times [2020-12-22 13:12:15,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:12:15,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340628465] [2020-12-22 13:12:15,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:12:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:15,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:12:15,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340628465] [2020-12-22 13:12:15,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446194047] [2020-12-22 13:12:15,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:58,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 13:14:58,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:14:58,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 2393 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 13:14:58,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:14:58,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:14:58,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:14:58,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2020-12-22 13:14:58,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586122760] [2020-12-22 13:14:58,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:14:58,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:58,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:14:58,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:14:58,472 INFO L87 Difference]: Start difference. First operand 2344 states and 3503 transitions. Second operand 3 states. [2020-12-22 13:14:58,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:58,816 INFO L93 Difference]: Finished difference Result 7004 states and 10598 transitions. [2020-12-22 13:14:58,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:14:58,817 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-12-22 13:14:58,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:58,859 INFO L225 Difference]: With dead ends: 7004 [2020-12-22 13:14:58,859 INFO L226 Difference]: Without dead ends: 4673 [2020-12-22 13:14:58,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:14:58,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4673 states. [2020-12-22 13:14:59,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4673 to 4661. [2020-12-22 13:14:59,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4661 states. [2020-12-22 13:14:59,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4661 states to 4661 states and 7002 transitions. [2020-12-22 13:14:59,101 INFO L78 Accepts]: Start accepts. Automaton has 4661 states and 7002 transitions. Word has length 27 [2020-12-22 13:14:59,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:59,101 INFO L481 AbstractCegarLoop]: Abstraction has 4661 states and 7002 transitions. [2020-12-22 13:14:59,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:14:59,102 INFO L276 IsEmpty]: Start isEmpty. Operand 4661 states and 7002 transitions. [2020-12-22 13:14:59,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 13:14:59,103 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:59,103 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:14:59,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:59,317 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:59,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:59,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1705760248, now seen corresponding path program 1 times [2020-12-22 13:14:59,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:59,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965139684] [2020-12-22 13:14:59,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:59,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:14:59,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965139684] [2020-12-22 13:14:59,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433896930] [2020-12-22 13:14:59,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:15:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:01,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 2407 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 13:15:01,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:15:01,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:15:01,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:15:01,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-22 13:15:01,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077531942] [2020-12-22 13:15:01,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 13:15:01,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:01,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 13:15:01,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:15:01,364 INFO L87 Difference]: Start difference. First operand 4661 states and 7002 transitions. Second operand 8 states. [2020-12-22 13:15:01,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:01,620 INFO L93 Difference]: Finished difference Result 9312 states and 13993 transitions. [2020-12-22 13:15:01,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:15:01,621 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-12-22 13:15:01,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:01,656 INFO L225 Difference]: With dead ends: 9312 [2020-12-22 13:15:01,657 INFO L226 Difference]: Without dead ends: 4662 [2020-12-22 13:15:01,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:15:01,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4662 states. [2020-12-22 13:15:01,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4662 to 4662. [2020-12-22 13:15:01,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4662 states. [2020-12-22 13:15:01,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4662 states to 4662 states and 7003 transitions. [2020-12-22 13:15:01,879 INFO L78 Accepts]: Start accepts. Automaton has 4662 states and 7003 transitions. Word has length 28 [2020-12-22 13:15:01,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:01,880 INFO L481 AbstractCegarLoop]: Abstraction has 4662 states and 7003 transitions. [2020-12-22 13:15:01,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 13:15:01,880 INFO L276 IsEmpty]: Start isEmpty. Operand 4662 states and 7003 transitions. [2020-12-22 13:15:01,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 13:15:01,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:01,885 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:15:02,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:15:02,100 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:02,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:02,100 INFO L82 PathProgramCache]: Analyzing trace with hash -122498570, now seen corresponding path program 2 times [2020-12-22 13:15:02,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:02,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662684371] [2020-12-22 13:15:02,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:02,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:15:02,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662684371] [2020-12-22 13:15:02,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101787450] [2020-12-22 13:15:02,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:15:03,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 13:15:03,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:15:03,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 2395 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 13:15:03,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:15:04,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 13:15:04,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:15:04,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2020-12-22 13:15:04,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078953105] [2020-12-22 13:15:04,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:15:04,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:04,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:15:04,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:15:04,116 INFO L87 Difference]: Start difference. First operand 4662 states and 7003 transitions. Second operand 4 states. [2020-12-22 13:15:05,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:05,296 INFO L93 Difference]: Finished difference Result 16259 states and 24837 transitions. [2020-12-22 13:15:05,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:15:05,296 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-12-22 13:15:05,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:05,374 INFO L225 Difference]: With dead ends: 16259 [2020-12-22 13:15:05,374 INFO L226 Difference]: Without dead ends: 11611 [2020-12-22 13:15:05,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:15:05,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11611 states. [2020-12-22 13:15:05,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11611 to 11587. [2020-12-22 13:15:05,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11587 states. [2020-12-22 13:15:05,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11587 states to 11587 states and 17523 transitions. [2020-12-22 13:15:05,971 INFO L78 Accepts]: Start accepts. Automaton has 11587 states and 17523 transitions. Word has length 29 [2020-12-22 13:15:05,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:05,971 INFO L481 AbstractCegarLoop]: Abstraction has 11587 states and 17523 transitions. [2020-12-22 13:15:05,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:15:05,971 INFO L276 IsEmpty]: Start isEmpty. Operand 11587 states and 17523 transitions. [2020-12-22 13:15:05,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 13:15:05,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:05,973 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:15:06,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:15:06,187 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:06,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:06,188 INFO L82 PathProgramCache]: Analyzing trace with hash 497514084, now seen corresponding path program 1 times [2020-12-22 13:15:06,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:06,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408700519] [2020-12-22 13:15:06,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:06,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 13:15:06,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408700519] [2020-12-22 13:15:06,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:15:06,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:15:06,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383431715] [2020-12-22 13:15:06,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:15:06,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:06,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:15:06,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:15:06,438 INFO L87 Difference]: Start difference. First operand 11587 states and 17523 transitions. Second operand 3 states. [2020-12-22 13:15:06,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:06,741 INFO L93 Difference]: Finished difference Result 11592 states and 17527 transitions. [2020-12-22 13:15:06,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:15:06,745 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-12-22 13:15:06,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:06,810 INFO L225 Difference]: With dead ends: 11592 [2020-12-22 13:15:06,811 INFO L226 Difference]: Without dead ends: 11590 [2020-12-22 13:15:06,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:15:06,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11590 states. [2020-12-22 13:15:07,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11590 to 11588. [2020-12-22 13:15:07,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11588 states. [2020-12-22 13:15:07,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11588 states to 11588 states and 17524 transitions. [2020-12-22 13:15:07,238 INFO L78 Accepts]: Start accepts. Automaton has 11588 states and 17524 transitions. Word has length 30 [2020-12-22 13:15:07,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:07,240 INFO L481 AbstractCegarLoop]: Abstraction has 11588 states and 17524 transitions. [2020-12-22 13:15:07,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:15:07,240 INFO L276 IsEmpty]: Start isEmpty. Operand 11588 states and 17524 transitions. [2020-12-22 13:15:07,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 13:15:07,241 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:07,241 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:15:07,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 13:15:07,245 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:07,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:07,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1756930112, now seen corresponding path program 1 times [2020-12-22 13:15:07,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:07,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954795404] [2020-12-22 13:15:07,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:07,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 13:15:07,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954795404] [2020-12-22 13:15:07,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:15:07,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:15:07,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613313102] [2020-12-22 13:15:07,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:15:07,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:07,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:15:07,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:15:07,523 INFO L87 Difference]: Start difference. First operand 11588 states and 17524 transitions. Second operand 3 states. [2020-12-22 13:15:07,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:07,847 INFO L93 Difference]: Finished difference Result 11588 states and 17524 transitions. [2020-12-22 13:15:07,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:15:07,848 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-12-22 13:15:07,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:07,895 INFO L225 Difference]: With dead ends: 11588 [2020-12-22 13:15:07,895 INFO L226 Difference]: Without dead ends: 11586 [2020-12-22 13:15:07,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:15:07,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11586 states. [2020-12-22 13:15:08,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11586 to 11586. [2020-12-22 13:15:08,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11586 states. [2020-12-22 13:15:08,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11586 states to 11586 states and 17522 transitions. [2020-12-22 13:15:08,311 INFO L78 Accepts]: Start accepts. Automaton has 11586 states and 17522 transitions. Word has length 31 [2020-12-22 13:15:08,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:08,311 INFO L481 AbstractCegarLoop]: Abstraction has 11586 states and 17522 transitions. [2020-12-22 13:15:08,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:15:08,312 INFO L276 IsEmpty]: Start isEmpty. Operand 11586 states and 17522 transitions. [2020-12-22 13:15:08,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 13:15:08,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:08,313 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:15:08,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 13:15:08,314 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:08,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:08,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1369743854, now seen corresponding path program 1 times [2020-12-22 13:15:08,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:08,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687886266] [2020-12-22 13:15:08,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:08,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 13:15:08,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687886266] [2020-12-22 13:15:08,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:15:08,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:15:08,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692774966] [2020-12-22 13:15:08,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:15:08,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:08,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:15:08,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:15:08,551 INFO L87 Difference]: Start difference. First operand 11586 states and 17522 transitions. Second operand 3 states. [2020-12-22 13:15:08,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:08,865 INFO L93 Difference]: Finished difference Result 11586 states and 17522 transitions. [2020-12-22 13:15:08,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:15:08,865 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-12-22 13:15:08,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:08,910 INFO L225 Difference]: With dead ends: 11586 [2020-12-22 13:15:08,910 INFO L226 Difference]: Without dead ends: 11577 [2020-12-22 13:15:08,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:15:08,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11577 states. [2020-12-22 13:15:09,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11577 to 11577. [2020-12-22 13:15:09,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11577 states. [2020-12-22 13:15:09,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11577 states to 11577 states and 17508 transitions. [2020-12-22 13:15:09,470 INFO L78 Accepts]: Start accepts. Automaton has 11577 states and 17508 transitions. Word has length 32 [2020-12-22 13:15:09,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:09,470 INFO L481 AbstractCegarLoop]: Abstraction has 11577 states and 17508 transitions. [2020-12-22 13:15:09,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:15:09,471 INFO L276 IsEmpty]: Start isEmpty. Operand 11577 states and 17508 transitions. [2020-12-22 13:15:09,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 13:15:09,480 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:09,480 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:15:09,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 13:15:09,481 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:09,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:09,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1600812266, now seen corresponding path program 1 times [2020-12-22 13:15:09,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:09,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058204052] [2020-12-22 13:15:09,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:09,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 13:15:09,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058204052] [2020-12-22 13:15:09,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:15:09,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:15:09,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719267015] [2020-12-22 13:15:09,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:15:09,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:09,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:15:09,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:15:09,703 INFO L87 Difference]: Start difference. First operand 11577 states and 17508 transitions. Second operand 3 states. [2020-12-22 13:15:10,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:10,208 INFO L93 Difference]: Finished difference Result 23969 states and 36311 transitions. [2020-12-22 13:15:10,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:15:10,209 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 13:15:10,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:10,258 INFO L225 Difference]: With dead ends: 23969 [2020-12-22 13:15:10,258 INFO L226 Difference]: Without dead ends: 12406 [2020-12-22 13:15:10,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:15:10,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12406 states. [2020-12-22 13:15:10,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12406 to 12382. [2020-12-22 13:15:10,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12382 states. [2020-12-22 13:15:10,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12382 states to 12382 states and 18786 transitions. [2020-12-22 13:15:10,907 INFO L78 Accepts]: Start accepts. Automaton has 12382 states and 18786 transitions. Word has length 81 [2020-12-22 13:15:10,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:10,907 INFO L481 AbstractCegarLoop]: Abstraction has 12382 states and 18786 transitions. [2020-12-22 13:15:10,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:15:10,907 INFO L276 IsEmpty]: Start isEmpty. Operand 12382 states and 18786 transitions. [2020-12-22 13:15:10,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 13:15:10,916 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:10,916 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:15:10,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 13:15:10,917 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:10,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:10,917 INFO L82 PathProgramCache]: Analyzing trace with hash -506379192, now seen corresponding path program 1 times [2020-12-22 13:15:10,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:10,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146071221] [2020-12-22 13:15:10,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:11,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:15:11,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146071221] [2020-12-22 13:15:11,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:15:11,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:15:11,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531367587] [2020-12-22 13:15:11,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:15:11,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:11,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:15:11,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:15:11,162 INFO L87 Difference]: Start difference. First operand 12382 states and 18786 transitions. Second operand 3 states. [2020-12-22 13:15:11,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:11,570 INFO L93 Difference]: Finished difference Result 24760 states and 37576 transitions. [2020-12-22 13:15:11,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:15:11,571 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-12-22 13:15:11,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:11,623 INFO L225 Difference]: With dead ends: 24760 [2020-12-22 13:15:11,623 INFO L226 Difference]: Without dead ends: 12392 [2020-12-22 13:15:11,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:15:11,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12392 states. [2020-12-22 13:15:12,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12392 to 12392. [2020-12-22 13:15:12,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12392 states. [2020-12-22 13:15:12,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12392 states to 12392 states and 18796 transitions. [2020-12-22 13:15:12,127 INFO L78 Accepts]: Start accepts. Automaton has 12392 states and 18796 transitions. Word has length 89 [2020-12-22 13:15:12,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:12,129 INFO L481 AbstractCegarLoop]: Abstraction has 12392 states and 18796 transitions. [2020-12-22 13:15:12,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:15:12,130 INFO L276 IsEmpty]: Start isEmpty. Operand 12392 states and 18796 transitions. [2020-12-22 13:15:12,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 13:15:12,142 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:12,142 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:15:12,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 13:15:12,142 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:12,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:12,143 INFO L82 PathProgramCache]: Analyzing trace with hash -900745978, now seen corresponding path program 1 times [2020-12-22 13:15:12,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:12,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140032195] [2020-12-22 13:15:12,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:15:12,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140032195] [2020-12-22 13:15:12,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106865654] [2020-12-22 13:15:12,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:15:14,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:14,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 2850 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 13:15:14,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:15:14,200 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 13:15:14,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:15:14,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 8 [2020-12-22 13:15:14,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098471081] [2020-12-22 13:15:14,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 13:15:14,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:14,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 13:15:14,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:15:14,202 INFO L87 Difference]: Start difference. First operand 12392 states and 18796 transitions. Second operand 8 states. [2020-12-22 13:15:18,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:18,028 INFO L93 Difference]: Finished difference Result 49517 states and 75128 transitions. [2020-12-22 13:15:18,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 13:15:18,029 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 89 [2020-12-22 13:15:18,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:18,167 INFO L225 Difference]: With dead ends: 49517 [2020-12-22 13:15:18,168 INFO L226 Difference]: Without dead ends: 37137 [2020-12-22 13:15:18,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-22 13:15:18,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37137 states. [2020-12-22 13:15:19,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37137 to 34299. [2020-12-22 13:15:19,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34299 states. [2020-12-22 13:15:19,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34299 states to 34299 states and 52239 transitions. [2020-12-22 13:15:19,685 INFO L78 Accepts]: Start accepts. Automaton has 34299 states and 52239 transitions. Word has length 89 [2020-12-22 13:15:19,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:19,685 INFO L481 AbstractCegarLoop]: Abstraction has 34299 states and 52239 transitions. [2020-12-22 13:15:19,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 13:15:19,685 INFO L276 IsEmpty]: Start isEmpty. Operand 34299 states and 52239 transitions. [2020-12-22 13:15:19,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 13:15:19,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:19,713 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:15:19,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 13:15:19,928 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:19,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:19,928 INFO L82 PathProgramCache]: Analyzing trace with hash 741785418, now seen corresponding path program 1 times [2020-12-22 13:15:19,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:19,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535923334] [2020-12-22 13:15:19,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:20,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:20,396 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 13:15:20,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535923334] [2020-12-22 13:15:20,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:15:20,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:15:20,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195707281] [2020-12-22 13:15:20,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:15:20,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:20,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:15:20,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:15:20,398 INFO L87 Difference]: Start difference. First operand 34299 states and 52239 transitions. Second operand 4 states. [2020-12-22 13:15:22,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:22,324 INFO L93 Difference]: Finished difference Result 85697 states and 130697 transitions. [2020-12-22 13:15:22,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:15:22,325 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2020-12-22 13:15:22,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:22,559 INFO L225 Difference]: With dead ends: 85697 [2020-12-22 13:15:22,559 INFO L226 Difference]: Without dead ends: 51313 [2020-12-22 13:15:22,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:15:22,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51313 states. [2020-12-22 13:15:24,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51313 to 34299. [2020-12-22 13:15:24,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34299 states. [2020-12-22 13:15:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34299 states to 34299 states and 52189 transitions. [2020-12-22 13:15:24,569 INFO L78 Accepts]: Start accepts. Automaton has 34299 states and 52189 transitions. Word has length 90 [2020-12-22 13:15:24,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:24,570 INFO L481 AbstractCegarLoop]: Abstraction has 34299 states and 52189 transitions. [2020-12-22 13:15:24,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:15:24,570 INFO L276 IsEmpty]: Start isEmpty. Operand 34299 states and 52189 transitions. [2020-12-22 13:15:24,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 13:15:24,586 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:24,587 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:15:24,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 13:15:24,587 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:24,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:24,588 INFO L82 PathProgramCache]: Analyzing trace with hash -613647098, now seen corresponding path program 1 times [2020-12-22 13:15:24,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:24,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057047778] [2020-12-22 13:15:24,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 13:15:25,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057047778] [2020-12-22 13:15:25,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:15:25,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 13:15:25,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469910902] [2020-12-22 13:15:25,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 13:15:25,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:25,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 13:15:25,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:15:25,264 INFO L87 Difference]: Start difference. First operand 34299 states and 52189 transitions. Second operand 7 states. [2020-12-22 13:15:28,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:28,489 INFO L93 Difference]: Finished difference Result 119615 states and 182907 transitions. [2020-12-22 13:15:28,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 13:15:28,490 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 92 [2020-12-22 13:15:28,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:29,008 INFO L225 Difference]: With dead ends: 119615 [2020-12-22 13:15:29,008 INFO L226 Difference]: Without dead ends: 85331 [2020-12-22 13:15:29,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 13:15:29,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85331 states. [2020-12-22 13:15:31,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85331 to 34449. [2020-12-22 13:15:31,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34449 states. [2020-12-22 13:15:31,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34449 states to 34449 states and 52339 transitions. [2020-12-22 13:15:31,484 INFO L78 Accepts]: Start accepts. Automaton has 34449 states and 52339 transitions. Word has length 92 [2020-12-22 13:15:31,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:31,485 INFO L481 AbstractCegarLoop]: Abstraction has 34449 states and 52339 transitions. [2020-12-22 13:15:31,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 13:15:31,485 INFO L276 IsEmpty]: Start isEmpty. Operand 34449 states and 52339 transitions. [2020-12-22 13:15:31,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 13:15:31,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:31,505 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:15:31,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 13:15:31,506 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:31,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:31,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1336971390, now seen corresponding path program 1 times [2020-12-22 13:15:31,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:31,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815018584] [2020-12-22 13:15:31,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:31,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 13:15:31,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815018584] [2020-12-22 13:15:31,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:15:31,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:15:31,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121206136] [2020-12-22 13:15:31,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:15:31,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:31,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:15:31,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:15:31,929 INFO L87 Difference]: Start difference. First operand 34449 states and 52339 transitions. Second operand 4 states. [2020-12-22 13:15:35,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:35,601 INFO L93 Difference]: Finished difference Result 111113 states and 169403 transitions. [2020-12-22 13:15:35,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:15:35,602 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-12-22 13:15:35,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:35,828 INFO L225 Difference]: With dead ends: 111113 [2020-12-22 13:15:35,828 INFO L226 Difference]: Without dead ends: 76679 [2020-12-22 13:15:35,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:15:35,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76679 states. [2020-12-22 13:15:37,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76679 to 34689. [2020-12-22 13:15:37,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34689 states. [2020-12-22 13:15:38,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34689 states to 34689 states and 52639 transitions. [2020-12-22 13:15:38,073 INFO L78 Accepts]: Start accepts. Automaton has 34689 states and 52639 transitions. Word has length 94 [2020-12-22 13:15:38,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:38,073 INFO L481 AbstractCegarLoop]: Abstraction has 34689 states and 52639 transitions. [2020-12-22 13:15:38,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:15:38,073 INFO L276 IsEmpty]: Start isEmpty. Operand 34689 states and 52639 transitions. [2020-12-22 13:15:38,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 13:15:38,086 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:38,086 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:15:38,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 13:15:38,087 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:38,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:38,087 INFO L82 PathProgramCache]: Analyzing trace with hash 324967742, now seen corresponding path program 1 times [2020-12-22 13:15:38,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:38,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225424314] [2020-12-22 13:15:38,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:38,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 13:15:38,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225424314] [2020-12-22 13:15:38,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:15:38,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 13:15:38,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687892960] [2020-12-22 13:15:38,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 13:15:38,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:38,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 13:15:38,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:15:38,852 INFO L87 Difference]: Start difference. First operand 34689 states and 52639 transitions. Second operand 6 states. [2020-12-22 13:15:46,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:46,653 INFO L93 Difference]: Finished difference Result 122099 states and 186201 transitions. [2020-12-22 13:15:46,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 13:15:46,654 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 96 [2020-12-22 13:15:46,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:46,829 INFO L225 Difference]: With dead ends: 122099 [2020-12-22 13:15:46,830 INFO L226 Difference]: Without dead ends: 87425 [2020-12-22 13:15:46,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-12-22 13:15:47,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87425 states. [2020-12-22 13:15:49,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87425 to 34518. [2020-12-22 13:15:49,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34518 states. [2020-12-22 13:15:49,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34518 states to 34518 states and 52359 transitions. [2020-12-22 13:15:49,323 INFO L78 Accepts]: Start accepts. Automaton has 34518 states and 52359 transitions. Word has length 96 [2020-12-22 13:15:49,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:49,323 INFO L481 AbstractCegarLoop]: Abstraction has 34518 states and 52359 transitions. [2020-12-22 13:15:49,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 13:15:49,323 INFO L276 IsEmpty]: Start isEmpty. Operand 34518 states and 52359 transitions. [2020-12-22 13:15:49,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-22 13:15:49,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:49,340 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:15:49,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 13:15:49,341 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:49,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:49,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1783800400, now seen corresponding path program 1 times [2020-12-22 13:15:49,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:49,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465212626] [2020-12-22 13:15:49,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY