./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outb.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outb.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b9ba053a0d2bb5cff65ef20f502acdb8ce89a9e82653cf0711701cf2b8f86a02 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 19:47:47,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 19:47:47,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 19:47:47,444 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 19:47:47,445 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 19:47:47,447 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 19:47:47,448 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 19:47:47,449 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 19:47:47,450 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 19:47:47,451 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 19:47:47,452 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 19:47:47,453 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 19:47:47,454 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 19:47:47,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 19:47:47,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 19:47:47,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 19:47:47,462 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 19:47:47,465 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 19:47:47,466 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 19:47:47,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 19:47:47,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 19:47:47,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 19:47:47,474 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 19:47:47,475 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 19:47:47,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 19:47:47,477 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 19:47:47,477 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 19:47:47,478 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 19:47:47,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 19:47:47,478 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 19:47:47,479 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 19:47:47,479 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 19:47:47,480 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 19:47:47,480 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 19:47:47,481 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 19:47:47,481 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 19:47:47,482 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 19:47:47,482 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 19:47:47,482 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 19:47:47,483 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 19:47:47,484 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 19:47:47,488 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-14 19:47:47,509 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 19:47:47,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 19:47:47,511 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 19:47:47,512 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 19:47:47,512 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 19:47:47,513 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 19:47:47,513 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 19:47:47,513 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 19:47:47,513 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 19:47:47,513 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 19:47:47,514 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 19:47:47,514 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 19:47:47,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 19:47:47,515 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 19:47:47,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 19:47:47,515 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-14 19:47:47,515 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-14 19:47:47,515 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-14 19:47:47,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 19:47:47,515 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 19:47:47,516 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 19:47:47,516 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 19:47:47,516 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 19:47:47,516 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 19:47:47,516 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 19:47:47,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:47:47,517 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 19:47:47,517 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 19:47:47,517 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 19:47:47,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 19:47:47,517 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 19:47:47,518 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b9ba053a0d2bb5cff65ef20f502acdb8ce89a9e82653cf0711701cf2b8f86a02 [2021-12-14 19:47:47,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 19:47:47,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 19:47:47,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 19:47:47,751 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 19:47:47,751 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 19:47:47,752 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outb.i [2021-12-14 19:47:47,800 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51f1694f5/5992702d5a884dfe90ae89ba323bd3fb/FLAGce619bc0e [2021-12-14 19:47:48,321 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 19:47:48,323 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outb.i [2021-12-14 19:47:48,355 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51f1694f5/5992702d5a884dfe90ae89ba323bd3fb/FLAGce619bc0e [2021-12-14 19:47:48,603 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51f1694f5/5992702d5a884dfe90ae89ba323bd3fb [2021-12-14 19:47:48,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 19:47:48,607 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 19:47:48,609 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 19:47:48,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 19:47:48,612 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 19:47:48,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:47:48" (1/1) ... [2021-12-14 19:47:48,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64c9dc1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:48, skipping insertion in model container [2021-12-14 19:47:48,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:47:48" (1/1) ... [2021-12-14 19:47:48,620 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 19:47:48,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 19:47:48,827 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outb.i[453,466] [2021-12-14 19:47:49,583 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:47:49,630 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-14 19:47:49,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3a04bf04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:49, skipping insertion in model container [2021-12-14 19:47:49,631 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 19:47:49,631 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-14 19:47:49,633 INFO L158 Benchmark]: Toolchain (without parser) took 1025.45ms. Allocated memory is still 109.1MB. Free memory was 76.7MB in the beginning and 58.1MB in the end (delta: 18.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-12-14 19:47:49,635 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 81.8MB. Free memory was 39.2MB in the beginning and 39.1MB in the end (delta: 46.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 19:47:49,636 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1022.31ms. Allocated memory is still 109.1MB. Free memory was 76.5MB in the beginning and 58.1MB in the end (delta: 18.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-12-14 19:47:49,637 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 81.8MB. Free memory was 39.2MB in the beginning and 39.1MB in the end (delta: 46.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1022.31ms. Allocated memory is still 109.1MB. Free memory was 76.5MB in the beginning and 58.1MB in the end (delta: 18.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2975]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outb.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b9ba053a0d2bb5cff65ef20f502acdb8ce89a9e82653cf0711701cf2b8f86a02 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 19:47:51,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 19:47:51,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 19:47:51,149 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 19:47:51,150 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 19:47:51,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 19:47:51,153 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 19:47:51,157 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 19:47:51,159 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 19:47:51,162 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 19:47:51,163 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 19:47:51,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 19:47:51,166 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 19:47:51,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 19:47:51,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 19:47:51,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 19:47:51,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 19:47:51,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 19:47:51,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 19:47:51,179 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 19:47:51,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 19:47:51,181 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 19:47:51,182 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 19:47:51,183 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 19:47:51,188 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 19:47:51,188 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 19:47:51,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 19:47:51,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 19:47:51,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 19:47:51,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 19:47:51,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 19:47:51,191 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 19:47:51,192 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 19:47:51,193 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 19:47:51,194 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 19:47:51,194 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 19:47:51,195 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 19:47:51,195 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 19:47:51,195 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 19:47:51,196 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 19:47:51,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 19:47:51,197 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-14 19:47:51,228 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 19:47:51,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 19:47:51,229 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 19:47:51,229 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 19:47:51,230 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 19:47:51,230 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 19:47:51,231 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 19:47:51,231 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 19:47:51,231 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 19:47:51,231 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 19:47:51,232 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 19:47:51,232 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 19:47:51,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 19:47:51,232 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 19:47:51,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 19:47:51,232 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-14 19:47:51,233 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-14 19:47:51,233 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-14 19:47:51,233 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 19:47:51,233 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 19:47:51,233 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-14 19:47:51,233 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-14 19:47:51,233 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 19:47:51,234 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 19:47:51,240 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 19:47:51,240 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 19:47:51,240 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 19:47:51,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:47:51,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 19:47:51,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 19:47:51,241 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-14 19:47:51,241 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-14 19:47:51,241 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 19:47:51,241 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-14 19:47:51,241 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b9ba053a0d2bb5cff65ef20f502acdb8ce89a9e82653cf0711701cf2b8f86a02 [2021-12-14 19:47:51,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 19:47:51,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 19:47:51,515 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 19:47:51,517 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 19:47:51,517 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 19:47:51,518 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outb.i [2021-12-14 19:47:51,570 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec15abe18/94e0b0dbe81c45c49a2d60b4e5fb1e2d/FLAGac2303d4d [2021-12-14 19:47:52,070 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 19:47:52,073 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outb.i [2021-12-14 19:47:52,100 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec15abe18/94e0b0dbe81c45c49a2d60b4e5fb1e2d/FLAGac2303d4d [2021-12-14 19:47:52,326 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec15abe18/94e0b0dbe81c45c49a2d60b4e5fb1e2d [2021-12-14 19:47:52,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 19:47:52,330 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 19:47:52,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 19:47:52,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 19:47:52,335 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 19:47:52,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:47:52" (1/1) ... [2021-12-14 19:47:52,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3afa03a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:52, skipping insertion in model container [2021-12-14 19:47:52,337 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:47:52" (1/1) ... [2021-12-14 19:47:52,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 19:47:52,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 19:47:52,564 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outb.i[453,466] [2021-12-14 19:47:53,348 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:47:53,381 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-14 19:47:53,397 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 19:47:53,399 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outb.i[453,466] [2021-12-14 19:47:53,523 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:47:53,540 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 19:47:53,548 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outb.i[453,466] [2021-12-14 19:47:53,647 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:47:53,744 INFO L208 MainTranslator]: Completed translation [2021-12-14 19:47:53,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:53 WrapperNode [2021-12-14 19:47:53,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 19:47:53,745 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 19:47:53,746 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 19:47:53,746 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 19:47:53,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:53" (1/1) ... [2021-12-14 19:47:53,815 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:53" (1/1) ... [2021-12-14 19:47:53,880 INFO L137 Inliner]: procedures = 482, calls = 839, calls flagged for inlining = 54, calls inlined = 38, statements flattened = 981 [2021-12-14 19:47:53,881 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 19:47:53,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 19:47:53,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 19:47:53,882 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 19:47:53,888 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:53" (1/1) ... [2021-12-14 19:47:53,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:53" (1/1) ... [2021-12-14 19:47:53,896 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:53" (1/1) ... [2021-12-14 19:47:53,897 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:53" (1/1) ... [2021-12-14 19:47:53,931 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:53" (1/1) ... [2021-12-14 19:47:53,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:53" (1/1) ... [2021-12-14 19:47:53,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:53" (1/1) ... [2021-12-14 19:47:53,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 19:47:53,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 19:47:53,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 19:47:53,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 19:47:53,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:53" (1/1) ... [2021-12-14 19:47:53,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:47:53,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:47:53,997 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 19:47:54,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 19:47:54,025 INFO L130 BoogieDeclarations]: Found specification of procedure zf_timer_off [2021-12-14 19:47:54,025 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_timer_off [2021-12-14 19:47:54,025 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~C_UINT~X~C_ULONG~TO~C_INT [2021-12-14 19:47:54,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~C_UINT~X~C_ULONG~TO~C_INT [2021-12-14 19:47:54,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-14 19:47:54,026 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_atomic_begin [2021-12-14 19:47:54,026 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-12-14 19:47:54,026 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-12-14 19:47:54,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 19:47:54,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-12-14 19:47:54,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-14 19:47:54,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-12-14 19:47:54,026 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-12-14 19:47:54,027 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-12-14 19:47:54,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-14 19:47:54,027 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_atomic_end [2021-12-14 19:47:54,027 INFO L130 BoogieDeclarations]: Found specification of procedure zf_get_control [2021-12-14 19:47:54,027 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_get_control [2021-12-14 19:47:54,027 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-12-14 19:47:54,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-12-14 19:47:54,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 19:47:54,028 INFO L130 BoogieDeclarations]: Found specification of procedure request_region [2021-12-14 19:47:54,028 INFO L138 BoogieDeclarations]: Found implementation of procedure request_region [2021-12-14 19:47:54,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 19:47:54,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 19:47:54,028 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-12-14 19:47:54,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-12-14 19:47:54,028 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irqsave [2021-12-14 19:47:54,028 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irqsave [2021-12-14 19:47:54,028 INFO L130 BoogieDeclarations]: Found specification of procedure release_region [2021-12-14 19:47:54,029 INFO L138 BoogieDeclarations]: Found implementation of procedure release_region [2021-12-14 19:47:54,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 19:47:54,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 19:47:54,029 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_init [2021-12-14 19:47:54,029 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_init [2021-12-14 19:47:54,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-12-14 19:47:54,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-14 19:47:54,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-12-14 19:47:54,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-14 19:47:54,030 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 19:47:54,030 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 19:47:54,030 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2021-12-14 19:47:54,030 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2021-12-14 19:47:54,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 19:47:54,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 19:47:54,031 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-12-14 19:47:54,031 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-12-14 19:47:54,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-12-14 19:47:54,031 INFO L130 BoogieDeclarations]: Found specification of procedure cdev_add [2021-12-14 19:47:54,032 INFO L138 BoogieDeclarations]: Found implementation of procedure cdev_add [2021-12-14 19:47:54,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-12-14 19:47:54,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-12-14 19:47:54,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-14 19:47:54,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 19:47:54,033 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2021-12-14 19:47:54,033 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2021-12-14 19:47:54,034 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2021-12-14 19:47:54,034 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2021-12-14 19:47:54,034 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-12-14 19:47:54,034 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-12-14 19:47:54,035 INFO L130 BoogieDeclarations]: Found specification of procedure misc_deregister [2021-12-14 19:47:54,035 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_deregister [2021-12-14 19:47:54,035 INFO L130 BoogieDeclarations]: Found specification of procedure assert_context_process [2021-12-14 19:47:54,035 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_context_process [2021-12-14 19:47:54,035 INFO L130 BoogieDeclarations]: Found specification of procedure zf_set_control [2021-12-14 19:47:54,035 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_set_control [2021-12-14 19:47:54,035 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~C_ULONG~X~$Pointer$~TO~C_LONG [2021-12-14 19:47:54,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~C_ULONG~X~$Pointer$~TO~C_LONG [2021-12-14 19:47:54,036 INFO L130 BoogieDeclarations]: Found specification of procedure zf_readw [2021-12-14 19:47:54,036 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_readw [2021-12-14 19:47:54,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-12-14 19:47:54,036 INFO L130 BoogieDeclarations]: Found specification of procedure zf_ping [2021-12-14 19:47:54,036 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_ping [2021-12-14 19:47:54,037 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-12-14 19:47:54,037 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-12-14 19:47:54,037 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~C_ULONG~TO~VOID [2021-12-14 19:47:54,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~C_ULONG~TO~VOID [2021-12-14 19:47:54,340 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 19:47:54,342 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 19:47:58,441 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 19:47:58,449 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 19:47:58,449 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-14 19:47:58,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:47:58 BoogieIcfgContainer [2021-12-14 19:47:58,467 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 19:47:58,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 19:47:58,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 19:47:58,471 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 19:47:58,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:47:52" (1/3) ... [2021-12-14 19:47:58,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1899b2a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:47:58, skipping insertion in model container [2021-12-14 19:47:58,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:53" (2/3) ... [2021-12-14 19:47:58,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1899b2a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:47:58, skipping insertion in model container [2021-12-14 19:47:58,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:47:58" (3/3) ... [2021-12-14 19:47:58,473 INFO L111 eAbstractionObserver]: Analyzing ICFG ddv_machzwd_outb.i [2021-12-14 19:47:58,477 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 19:47:58,477 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 206 error locations. [2021-12-14 19:47:58,507 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 19:47:58,511 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 19:47:58,512 INFO L340 AbstractCegarLoop]: Starting to check reachability of 206 error locations. [2021-12-14 19:47:58,537 INFO L276 IsEmpty]: Start isEmpty. Operand has 671 states, 360 states have (on average 1.8166666666666667) internal successors, (654), 571 states have internal predecessors, (654), 78 states have call successors, (78), 26 states have call predecessors, (78), 26 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2021-12-14 19:47:58,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-14 19:47:58,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:47:58,544 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-14 19:47:58,544 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting spin_lock_initErr0REQUIRES_VIOLATION === [spin_lock_initErr0REQUIRES_VIOLATION, spin_lock_initErr1REQUIRES_VIOLATION, spin_lock_initErr2REQUIRES_VIOLATION, spin_lock_initErr3REQUIRES_VIOLATION (and 202 more)] === [2021-12-14 19:47:58,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:47:58,552 INFO L85 PathProgramCache]: Analyzing trace with hash 346313650, now seen corresponding path program 1 times [2021-12-14 19:47:58,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:47:58,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819626241] [2021-12-14 19:47:58,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:47:58,567 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:47:58,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:47:58,569 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:47:58,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-14 19:47:58,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:47:58,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 19:47:58,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:47:59,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:59,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:47:59,028 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:47:59,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819626241] [2021-12-14 19:47:59,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819626241] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:47:59,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:47:59,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:47:59,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469170182] [2021-12-14 19:47:59,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:47:59,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:47:59,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:47:59,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:47:59,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:47:59,084 INFO L87 Difference]: Start difference. First operand has 671 states, 360 states have (on average 1.8166666666666667) internal successors, (654), 571 states have internal predecessors, (654), 78 states have call successors, (78), 26 states have call predecessors, (78), 26 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:48:01,137 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 19:48:03,149 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 19:48:05,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:48:05,137 INFO L93 Difference]: Finished difference Result 1214 states and 1453 transitions. [2021-12-14 19:48:05,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:48:05,139 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-12-14 19:48:05,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:48:05,152 INFO L225 Difference]: With dead ends: 1214 [2021-12-14 19:48:05,157 INFO L226 Difference]: Without dead ends: 1210 [2021-12-14 19:48:05,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:48:05,162 INFO L933 BasicCegarLoop]: 746 mSDtfsCounter, 692 mSDsluCounter, 1700 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 2446 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-12-14 19:48:05,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [693 Valid, 2446 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1110 Invalid, 2 Unknown, 0 Unchecked, 5.9s Time] [2021-12-14 19:48:05,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-12-14 19:48:05,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 995. [2021-12-14 19:48:05,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 601 states have (on average 1.7970049916805324) internal successors, (1080), 822 states have internal predecessors, (1080), 138 states have call successors, (138), 50 states have call predecessors, (138), 50 states have return successors, (138), 131 states have call predecessors, (138), 138 states have call successors, (138) [2021-12-14 19:48:05,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1356 transitions. [2021-12-14 19:48:05,248 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1356 transitions. Word has length 5 [2021-12-14 19:48:05,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:48:05,249 INFO L470 AbstractCegarLoop]: Abstraction has 995 states and 1356 transitions. [2021-12-14 19:48:05,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:48:05,249 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1356 transitions. [2021-12-14 19:48:05,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-14 19:48:05,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:48:05,249 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-14 19:48:05,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-14 19:48:05,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:48:05,450 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting spin_lock_initErr1REQUIRES_VIOLATION === [spin_lock_initErr0REQUIRES_VIOLATION, spin_lock_initErr1REQUIRES_VIOLATION, spin_lock_initErr2REQUIRES_VIOLATION, spin_lock_initErr3REQUIRES_VIOLATION (and 202 more)] === [2021-12-14 19:48:05,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:48:05,451 INFO L85 PathProgramCache]: Analyzing trace with hash 346313651, now seen corresponding path program 1 times [2021-12-14 19:48:05,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:48:05,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114955916] [2021-12-14 19:48:05,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:48:05,452 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:48:05,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:48:05,453 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:48:05,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-14 19:48:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:48:05,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 19:48:05,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:48:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:48:05,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:48:05,823 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:48:05,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114955916] [2021-12-14 19:48:05,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114955916] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:48:05,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:48:05,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:48:05,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736955647] [2021-12-14 19:48:05,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:48:05,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:48:05,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:48:05,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:48:05,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:48:05,825 INFO L87 Difference]: Start difference. First operand 995 states and 1356 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:48:07,843 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 19:48:09,397 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 19:48:11,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:48:11,226 INFO L93 Difference]: Finished difference Result 1132 states and 1453 transitions. [2021-12-14 19:48:11,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:48:11,226 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-12-14 19:48:11,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:48:11,232 INFO L225 Difference]: With dead ends: 1132 [2021-12-14 19:48:11,232 INFO L226 Difference]: Without dead ends: 1132 [2021-12-14 19:48:11,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:48:11,233 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 273 mSDsluCounter, 1791 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 2625 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:48:11,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 2625 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 843 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2021-12-14 19:48:11,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2021-12-14 19:48:11,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 1071. [2021-12-14 19:48:11,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 645 states have (on average 1.758139534883721) internal successors, (1134), 867 states have internal predecessors, (1134), 157 states have call successors, (157), 63 states have call predecessors, (157), 63 states have return successors, (157), 150 states have call predecessors, (157), 157 states have call successors, (157) [2021-12-14 19:48:11,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1448 transitions. [2021-12-14 19:48:11,284 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1448 transitions. Word has length 5 [2021-12-14 19:48:11,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:48:11,285 INFO L470 AbstractCegarLoop]: Abstraction has 1071 states and 1448 transitions. [2021-12-14 19:48:11,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:48:11,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1448 transitions. [2021-12-14 19:48:11,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 19:48:11,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:48:11,286 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:48:11,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-14 19:48:11,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:48:11,496 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [spin_lock_initErr0REQUIRES_VIOLATION, spin_lock_initErr1REQUIRES_VIOLATION, spin_lock_initErr2REQUIRES_VIOLATION, spin_lock_initErr3REQUIRES_VIOLATION (and 202 more)] === [2021-12-14 19:48:11,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:48:11,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1264119090, now seen corresponding path program 1 times [2021-12-14 19:48:11,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:48:11,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988608823] [2021-12-14 19:48:11,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:48:11,498 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:48:11,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:48:11,498 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:48:11,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-14 19:48:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:48:11,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 19:48:11,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:48:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:48:11,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:48:11,882 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:48:11,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988608823] [2021-12-14 19:48:11,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988608823] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:48:11,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:48:11,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-14 19:48:11,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50370997] [2021-12-14 19:48:11,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:48:11,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:48:11,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:48:11,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:48:11,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:48:11,884 INFO L87 Difference]: Start difference. First operand 1071 states and 1448 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:48:12,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:48:12,939 INFO L93 Difference]: Finished difference Result 1279 states and 1536 transitions. [2021-12-14 19:48:12,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:48:12,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-12-14 19:48:12,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:48:12,945 INFO L225 Difference]: With dead ends: 1279 [2021-12-14 19:48:12,945 INFO L226 Difference]: Without dead ends: 1279 [2021-12-14 19:48:12,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:48:12,946 INFO L933 BasicCegarLoop]: 728 mSDtfsCounter, 665 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 1281 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:48:12,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [665 Valid, 1281 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 19:48:12,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-12-14 19:48:12,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1070. [2021-12-14 19:48:12,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 645 states have (on average 1.7503875968992249) internal successors, (1129), 866 states have internal predecessors, (1129), 157 states have call successors, (157), 63 states have call predecessors, (157), 63 states have return successors, (157), 150 states have call predecessors, (157), 157 states have call successors, (157) [2021-12-14 19:48:12,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1443 transitions. [2021-12-14 19:48:12,987 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1443 transitions. Word has length 11 [2021-12-14 19:48:12,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:48:12,988 INFO L470 AbstractCegarLoop]: Abstraction has 1070 states and 1443 transitions. [2021-12-14 19:48:12,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:48:12,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1443 transitions. [2021-12-14 19:48:12,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 19:48:12,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:48:12,989 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:48:13,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-14 19:48:13,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:48:13,199 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [spin_lock_initErr0REQUIRES_VIOLATION, spin_lock_initErr1REQUIRES_VIOLATION, spin_lock_initErr2REQUIRES_VIOLATION, spin_lock_initErr3REQUIRES_VIOLATION (and 202 more)] === [2021-12-14 19:48:13,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:48:13,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1264119091, now seen corresponding path program 1 times [2021-12-14 19:48:13,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:48:13,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272606001] [2021-12-14 19:48:13,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:48:13,201 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:48:13,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:48:13,202 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:48:13,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-14 19:48:13,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:48:13,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 19:48:13,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:48:13,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:48:13,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:48:13,594 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:48:13,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [272606001] [2021-12-14 19:48:13,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [272606001] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:48:13,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:48:13,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:48:13,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788473312] [2021-12-14 19:48:13,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:48:13,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:48:13,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:48:13,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:48:13,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:48:13,596 INFO L87 Difference]: Start difference. First operand 1070 states and 1443 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:48:15,615 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 19:48:16,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:48:16,927 INFO L93 Difference]: Finished difference Result 1138 states and 1459 transitions. [2021-12-14 19:48:16,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:48:16,928 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-12-14 19:48:16,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:48:16,931 INFO L225 Difference]: With dead ends: 1138 [2021-12-14 19:48:16,932 INFO L226 Difference]: Without dead ends: 1138 [2021-12-14 19:48:16,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:48:16,932 INFO L933 BasicCegarLoop]: 831 mSDtfsCounter, 273 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 1518 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:48:16,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 1518 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 410 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2021-12-14 19:48:16,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-12-14 19:48:16,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1073. [2021-12-14 19:48:16,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 648 states have (on average 1.7469135802469136) internal successors, (1132), 869 states have internal predecessors, (1132), 157 states have call successors, (157), 63 states have call predecessors, (157), 63 states have return successors, (157), 150 states have call predecessors, (157), 157 states have call successors, (157) [2021-12-14 19:48:16,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1446 transitions. [2021-12-14 19:48:16,965 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1446 transitions. Word has length 11 [2021-12-14 19:48:16,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:48:16,965 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 1446 transitions. [2021-12-14 19:48:16,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:48:16,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1446 transitions. [2021-12-14 19:48:16,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-14 19:48:16,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:48:16,966 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:48:16,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-14 19:48:17,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:48:17,179 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [spin_lock_initErr0REQUIRES_VIOLATION, spin_lock_initErr1REQUIRES_VIOLATION, spin_lock_initErr2REQUIRES_VIOLATION, spin_lock_initErr3REQUIRES_VIOLATION (and 202 more)] === [2021-12-14 19:48:17,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:48:17,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1098875471, now seen corresponding path program 1 times [2021-12-14 19:48:17,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:48:17,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153782612] [2021-12-14 19:48:17,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:48:17,180 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:48:17,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:48:17,181 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:48:17,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-14 19:48:17,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:48:17,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 19:48:17,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:48:17,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:48:17,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:48:17,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:48:17,956 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:48:17,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153782612] [2021-12-14 19:48:17,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153782612] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:48:17,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:48:17,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2021-12-14 19:48:17,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013463036] [2021-12-14 19:48:17,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:48:17,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 19:48:17,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:48:17,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 19:48:17,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 19:48:17,958 INFO L87 Difference]: Start difference. First operand 1073 states and 1446 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:48:19,974 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 19:48:21,982 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 19:48:27,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:48:27,562 INFO L93 Difference]: Finished difference Result 1353 states and 1698 transitions. [2021-12-14 19:48:27,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 19:48:27,563 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2021-12-14 19:48:27,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:48:27,591 INFO L225 Difference]: With dead ends: 1353 [2021-12-14 19:48:27,591 INFO L226 Difference]: Without dead ends: 1353 [2021-12-14 19:48:27,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-12-14 19:48:27,594 INFO L933 BasicCegarLoop]: 831 mSDtfsCounter, 1346 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 168 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1358 SdHoareTripleChecker+Valid, 2724 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:48:27,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1358 Valid, 2724 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1175 Invalid, 2 Unknown, 0 Unchecked, 9.3s Time] [2021-12-14 19:48:27,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-12-14 19:48:27,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1223. [2021-12-14 19:48:27,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1223 states, 755 states have (on average 1.732450331125828) internal successors, (1308), 978 states have internal predecessors, (1308), 184 states have call successors, (184), 79 states have call predecessors, (184), 79 states have return successors, (184), 176 states have call predecessors, (184), 184 states have call successors, (184) [2021-12-14 19:48:27,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1223 states to 1223 states and 1676 transitions. [2021-12-14 19:48:27,621 INFO L78 Accepts]: Start accepts. Automaton has 1223 states and 1676 transitions. Word has length 14 [2021-12-14 19:48:27,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:48:27,622 INFO L470 AbstractCegarLoop]: Abstraction has 1223 states and 1676 transitions. [2021-12-14 19:48:27,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:48:27,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1223 states and 1676 transitions. [2021-12-14 19:48:27,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-14 19:48:27,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:48:27,623 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:48:27,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-14 19:48:27,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:48:27,835 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [spin_lock_initErr0REQUIRES_VIOLATION, spin_lock_initErr1REQUIRES_VIOLATION, spin_lock_initErr2REQUIRES_VIOLATION, spin_lock_initErr3REQUIRES_VIOLATION (and 202 more)] === [2021-12-14 19:48:27,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:48:27,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1126023645, now seen corresponding path program 1 times [2021-12-14 19:48:27,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:48:27,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106020043] [2021-12-14 19:48:27,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:48:27,837 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:48:27,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:48:27,839 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:48:27,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-14 19:48:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:48:28,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 19:48:28,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:48:28,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:48:28,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:48:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:48:28,326 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:48:28,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2106020043] [2021-12-14 19:48:28,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2106020043] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:48:28,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:48:28,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-14 19:48:28,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380599544] [2021-12-14 19:48:28,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:48:28,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 19:48:28,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:48:28,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 19:48:28,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 19:48:28,328 INFO L87 Difference]: Start difference. First operand 1223 states and 1676 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:48:28,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:48:28,649 INFO L93 Difference]: Finished difference Result 1229 states and 1680 transitions. [2021-12-14 19:48:28,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 19:48:28,649 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-12-14 19:48:28,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:48:28,653 INFO L225 Difference]: With dead ends: 1229 [2021-12-14 19:48:28,653 INFO L226 Difference]: Without dead ends: 1229 [2021-12-14 19:48:28,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:48:28,654 INFO L933 BasicCegarLoop]: 790 mSDtfsCounter, 1284 mSDsluCounter, 2174 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1316 SdHoareTripleChecker+Valid, 2964 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:48:28,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1316 Valid, 2964 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:48:28,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2021-12-14 19:48:28,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1228. [2021-12-14 19:48:28,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 760 states have (on average 1.7263157894736842) internal successors, (1312), 983 states have internal predecessors, (1312), 184 states have call successors, (184), 79 states have call predecessors, (184), 79 states have return successors, (184), 176 states have call predecessors, (184), 184 states have call successors, (184) [2021-12-14 19:48:28,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1680 transitions. [2021-12-14 19:48:28,678 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1680 transitions. Word has length 19 [2021-12-14 19:48:28,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:48:28,678 INFO L470 AbstractCegarLoop]: Abstraction has 1228 states and 1680 transitions. [2021-12-14 19:48:28,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:48:28,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1680 transitions. [2021-12-14 19:48:28,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-14 19:48:28,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:48:28,681 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:48:28,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-14 19:48:28,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:48:28,886 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [spin_lock_initErr0REQUIRES_VIOLATION, spin_lock_initErr1REQUIRES_VIOLATION, spin_lock_initErr2REQUIRES_VIOLATION, spin_lock_initErr3REQUIRES_VIOLATION (and 202 more)] === [2021-12-14 19:48:28,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:48:28,886 INFO L85 PathProgramCache]: Analyzing trace with hash 741098035, now seen corresponding path program 2 times [2021-12-14 19:48:28,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:48:28,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398823141] [2021-12-14 19:48:28,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:48:28,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:48:28,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:48:28,888 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:48:28,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-14 19:48:29,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:48:29,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:48:29,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 19:48:29,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:48:29,620 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:48:29,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:48:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:48:30,460 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:48:30,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [398823141] [2021-12-14 19:48:30,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [398823141] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:48:30,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:48:30,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 14 [2021-12-14 19:48:30,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766446664] [2021-12-14 19:48:30,461 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:48:30,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-14 19:48:30,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:48:30,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-14 19:48:30,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-12-14 19:48:30,462 INFO L87 Difference]: Start difference. First operand 1228 states and 1680 transitions. Second operand has 15 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:48:32,479 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 19:48:34,489 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 19:48:36,169 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 19:48:38,143 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 19:48:40,153 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 19:48:42,161 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 19:48:44,174 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 19:48:56,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:48:56,803 INFO L93 Difference]: Finished difference Result 1357 states and 1715 transitions. [2021-12-14 19:48:56,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-14 19:48:56,804 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-12-14 19:48:56,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:48:56,807 INFO L225 Difference]: With dead ends: 1357 [2021-12-14 19:48:56,807 INFO L226 Difference]: Without dead ends: 1357 [2021-12-14 19:48:56,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=243, Invalid=407, Unknown=0, NotChecked=0, Total=650 [2021-12-14 19:48:56,808 INFO L933 BasicCegarLoop]: 819 mSDtfsCounter, 1007 mSDsluCounter, 4863 mSDsCounter, 0 mSdLazyCounter, 2755 mSolverCounterSat, 188 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1019 SdHoareTripleChecker+Valid, 5682 SdHoareTripleChecker+Invalid, 2948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 2755 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.7s IncrementalHoareTripleChecker+Time [2021-12-14 19:48:56,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1019 Valid, 5682 Invalid, 2948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 2755 Invalid, 5 Unknown, 0 Unchecked, 24.7s Time] [2021-12-14 19:48:56,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2021-12-14 19:48:56,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1241. [2021-12-14 19:48:56,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 773 states have (on average 1.7179818887451488) internal successors, (1328), 996 states have internal predecessors, (1328), 184 states have call successors, (184), 79 states have call predecessors, (184), 79 states have return successors, (184), 176 states have call predecessors, (184), 184 states have call successors, (184) [2021-12-14 19:48:56,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 1696 transitions. [2021-12-14 19:48:56,826 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 1696 transitions. Word has length 23 [2021-12-14 19:48:56,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:48:56,826 INFO L470 AbstractCegarLoop]: Abstraction has 1241 states and 1696 transitions. [2021-12-14 19:48:56,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:48:56,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 1696 transitions. [2021-12-14 19:48:56,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-14 19:48:56,827 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:48:56,827 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:48:56,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-14 19:48:57,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:48:57,039 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [spin_lock_initErr0REQUIRES_VIOLATION, spin_lock_initErr1REQUIRES_VIOLATION, spin_lock_initErr2REQUIRES_VIOLATION, spin_lock_initErr3REQUIRES_VIOLATION (and 202 more)] === [2021-12-14 19:48:57,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:48:57,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1506547421, now seen corresponding path program 2 times [2021-12-14 19:48:57,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:48:57,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542891213] [2021-12-14 19:48:57,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:48:57,041 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:48:57,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:48:57,041 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:48:57,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-14 19:48:57,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-14 19:48:57,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:48:57,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 19:48:57,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:48:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-14 19:48:57,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:48:57,532 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:48:57,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542891213] [2021-12-14 19:48:57,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542891213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:48:57,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:48:57,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-14 19:48:57,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566081520] [2021-12-14 19:48:57,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:48:57,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:48:57,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:48:57,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:48:57,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:48:57,533 INFO L87 Difference]: Start difference. First operand 1241 states and 1696 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)