./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext2/complex_data_creation_test02-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version ff03de63 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/memsafety-ext2/complex_data_creation_test02-1.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 1489855b7530896bdd176b2b4b6c40b97d8289986908954c704880efe20dffb0 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 18:06:34,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 18:06:34,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 18:06:34,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 18:06:34,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 18:06:34,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 18:06:34,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 18:06:34,991 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 18:06:34,993 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 18:06:34,996 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 18:06:34,997 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 18:06:34,998 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 18:06:34,998 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 18:06:35,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 18:06:35,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 18:06:35,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 18:06:35,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 18:06:35,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 18:06:35,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 18:06:35,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 18:06:35,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 18:06:35,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 18:06:35,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 18:06:35,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 18:06:35,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 18:06:35,019 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 18:06:35,020 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 18:06:35,021 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 18:06:35,021 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 18:06:35,022 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 18:06:35,022 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 18:06:35,022 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 18:06:35,024 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 18:06:35,024 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 18:06:35,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 18:06:35,025 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 18:06:35,026 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 18:06:35,026 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 18:06:35,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 18:06:35,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 18:06:35,027 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 18:06:35,029 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-21 18:06:35,053 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 18:06:35,053 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 18:06:35,053 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 18:06:35,054 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 18:06:35,054 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 18:06:35,054 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 18:06:35,055 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 18:06:35,055 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 18:06:35,055 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 18:06:35,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 18:06:35,056 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 18:06:35,056 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 18:06:35,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 18:06:35,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 18:06:35,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 18:06:35,057 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 18:06:35,057 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 18:06:35,057 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 18:06:35,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 18:06:35,057 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 18:06:35,057 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 18:06:35,057 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 18:06:35,057 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 18:06:35,058 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 18:06:35,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 18:06:35,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:06:35,058 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 18:06:35,058 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 18:06:35,058 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 18:06:35,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 18:06:35,059 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 18:06:35,059 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1489855b7530896bdd176b2b4b6c40b97d8289986908954c704880efe20dffb0 [2021-12-21 18:06:35,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 18:06:35,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 18:06:35,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 18:06:35,297 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 18:06:35,297 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 18:06:35,299 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext2/complex_data_creation_test02-1.i [2021-12-21 18:06:35,349 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e64de615e/3572642f57404505a3611442fb522fe5/FLAG4b4effcce [2021-12-21 18:06:35,813 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 18:06:35,814 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext2/complex_data_creation_test02-1.i [2021-12-21 18:06:35,827 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e64de615e/3572642f57404505a3611442fb522fe5/FLAG4b4effcce [2021-12-21 18:06:36,332 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e64de615e/3572642f57404505a3611442fb522fe5 [2021-12-21 18:06:36,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 18:06:36,342 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 18:06:36,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 18:06:36,346 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 18:06:36,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 18:06:36,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:06:36" (1/1) ... [2021-12-21 18:06:36,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c52a6f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:06:36, skipping insertion in model container [2021-12-21 18:06:36,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:06:36" (1/1) ... [2021-12-21 18:06:36,359 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 18:06:36,423 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 18:06:36,805 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:06:36,814 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) [2021-12-21 18:06:36,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6e6bd79f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:06:36, skipping insertion in model container [2021-12-21 18:06:36,815 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 18:06:36,815 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-21 18:06:36,817 INFO L158 Benchmark]: Toolchain (without parser) took 473.96ms. Allocated memory is still 146.8MB. Free memory was 113.6MB in the beginning and 118.9MB in the end (delta: -5.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 18:06:36,818 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 83.9MB. Free memory was 41.9MB in the beginning and 41.9MB in the end (delta: 40.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 18:06:36,819 INFO L158 Benchmark]: CACSL2BoogieTranslator took 469.22ms. Allocated memory is still 146.8MB. Free memory was 113.6MB in the beginning and 118.9MB in the end (delta: -5.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 18:06:36,820 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 83.9MB. Free memory was 41.9MB in the beginning and 41.9MB in the end (delta: 40.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 469.22ms. Allocated memory is still 146.8MB. Free memory was 113.6MB in the beginning and 118.9MB in the end (delta: -5.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 556]: 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/memsafety-ext2/complex_data_creation_test02-1.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 1489855b7530896bdd176b2b4b6c40b97d8289986908954c704880efe20dffb0 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 18:06:38,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 18:06:38,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 18:06:38,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 18:06:38,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 18:06:38,576 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 18:06:38,578 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 18:06:38,584 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 18:06:38,587 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 18:06:38,592 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 18:06:38,594 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 18:06:38,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 18:06:38,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 18:06:38,598 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 18:06:38,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 18:06:38,604 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 18:06:38,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 18:06:38,606 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 18:06:38,611 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 18:06:38,613 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 18:06:38,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 18:06:38,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 18:06:38,620 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 18:06:38,621 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 18:06:38,623 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 18:06:38,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 18:06:38,626 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 18:06:38,628 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 18:06:38,628 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 18:06:38,629 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 18:06:38,629 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 18:06:38,630 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 18:06:38,631 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 18:06:38,632 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 18:06:38,633 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 18:06:38,633 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 18:06:38,634 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 18:06:38,634 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 18:06:38,634 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 18:06:38,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 18:06:38,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 18:06:38,640 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-21 18:06:38,670 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 18:06:38,670 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 18:06:38,671 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 18:06:38,672 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 18:06:38,673 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 18:06:38,673 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 18:06:38,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 18:06:38,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 18:06:38,675 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 18:06:38,675 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 18:06:38,676 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 18:06:38,676 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 18:06:38,676 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 18:06:38,676 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 18:06:38,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 18:06:38,677 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 18:06:38,677 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 18:06:38,677 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 18:06:38,677 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 18:06:38,677 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 18:06:38,677 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-21 18:06:38,678 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-21 18:06:38,678 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 18:06:38,678 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 18:06:38,678 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 18:06:38,678 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 18:06:38,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 18:06:38,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:06:38,679 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 18:06:38,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 18:06:38,679 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-21 18:06:38,679 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-21 18:06:38,680 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 18:06:38,680 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-21 18:06:38,680 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1489855b7530896bdd176b2b4b6c40b97d8289986908954c704880efe20dffb0 [2021-12-21 18:06:38,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 18:06:38,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 18:06:38,976 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 18:06:38,977 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 18:06:38,977 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 18:06:38,979 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext2/complex_data_creation_test02-1.i [2021-12-21 18:06:39,039 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f57b49665/16932e6b672846a8bd1ce67c36402674/FLAGd38a0943c [2021-12-21 18:06:39,484 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 18:06:39,484 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext2/complex_data_creation_test02-1.i [2021-12-21 18:06:39,496 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f57b49665/16932e6b672846a8bd1ce67c36402674/FLAGd38a0943c [2021-12-21 18:06:39,512 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f57b49665/16932e6b672846a8bd1ce67c36402674 [2021-12-21 18:06:39,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 18:06:39,515 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 18:06:39,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 18:06:39,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 18:06:39,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 18:06:39,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:06:39" (1/1) ... [2021-12-21 18:06:39,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e46ce9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:06:39, skipping insertion in model container [2021-12-21 18:06:39,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:06:39" (1/1) ... [2021-12-21 18:06:39,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 18:06:39,561 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 18:06:39,852 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:06:39,862 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-21 18:06:39,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 18:06:39,904 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:06:39,912 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 18:06:39,951 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:06:39,981 INFO L208 MainTranslator]: Completed translation [2021-12-21 18:06:39,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:06:39 WrapperNode [2021-12-21 18:06:39,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 18:06:39,984 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 18:06:39,984 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 18:06:39,984 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 18:06:39,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:06:39" (1/1) ... [2021-12-21 18:06:40,001 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:06:39" (1/1) ... [2021-12-21 18:06:40,016 INFO L137 Inliner]: procedures = 129, calls = 62, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 98 [2021-12-21 18:06:40,016 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 18:06:40,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 18:06:40,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 18:06:40,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 18:06:40,023 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:06:39" (1/1) ... [2021-12-21 18:06:40,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:06:39" (1/1) ... [2021-12-21 18:06:40,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:06:39" (1/1) ... [2021-12-21 18:06:40,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:06:39" (1/1) ... [2021-12-21 18:06:40,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:06:39" (1/1) ... [2021-12-21 18:06:40,061 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:06:39" (1/1) ... [2021-12-21 18:06:40,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:06:39" (1/1) ... [2021-12-21 18:06:40,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 18:06:40,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 18:06:40,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 18:06:40,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 18:06:40,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:06:39" (1/1) ... [2021-12-21 18:06:40,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:06:40,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:06:40,092 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) [2021-12-21 18:06:40,108 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 [2021-12-21 18:06:40,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-21 18:06:40,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 18:06:40,159 INFO L130 BoogieDeclarations]: Found specification of procedure create_data [2021-12-21 18:06:40,171 INFO L138 BoogieDeclarations]: Found implementation of procedure create_data [2021-12-21 18:06:40,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 18:06:40,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 18:06:40,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 18:06:40,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 18:06:40,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 18:06:40,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-21 18:06:40,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 18:06:40,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-21 18:06:40,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 18:06:40,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 18:06:40,249 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 18:06:40,250 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 18:06:40,898 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 18:06:40,906 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 18:06:40,908 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-21 18:06:40,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:06:40 BoogieIcfgContainer [2021-12-21 18:06:40,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 18:06:40,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 18:06:40,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 18:06:40,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 18:06:40,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 06:06:39" (1/3) ... [2021-12-21 18:06:40,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739d28b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:06:40, skipping insertion in model container [2021-12-21 18:06:40,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:06:39" (2/3) ... [2021-12-21 18:06:40,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739d28b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:06:40, skipping insertion in model container [2021-12-21 18:06:40,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:06:40" (3/3) ... [2021-12-21 18:06:40,917 INFO L111 eAbstractionObserver]: Analyzing ICFG complex_data_creation_test02-1.i [2021-12-21 18:06:40,921 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 18:06:40,921 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 92 error locations. [2021-12-21 18:06:40,959 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 18:06:40,965 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 [2021-12-21 18:06:40,965 INFO L340 AbstractCegarLoop]: Starting to check reachability of 92 error locations. [2021-12-21 18:06:40,979 INFO L276 IsEmpty]: Start isEmpty. Operand has 190 states, 94 states have (on average 2.148936170212766) internal successors, (202), 186 states have internal predecessors, (202), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:06:40,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-21 18:06:40,983 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:06:40,983 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-21 18:06:40,983 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:06:40,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:06:40,987 INFO L85 PathProgramCache]: Analyzing trace with hash 5083689, now seen corresponding path program 1 times [2021-12-21 18:06:40,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:06:40,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [594709009] [2021-12-21 18:06:40,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:06:40,995 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:06:40,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:06:41,012 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) [2021-12-21 18:06:41,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-21 18:06:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:06:41,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-21 18:06:41,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:06:41,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:06:41,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:06:41,123 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:06:41,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [594709009] [2021-12-21 18:06:41,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [594709009] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:06:41,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:06:41,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:06:41,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769483691] [2021-12-21 18:06:41,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:06:41,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 18:06:41,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:06:41,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 18:06:41,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 18:06:41,156 INFO L87 Difference]: Start difference. First operand has 190 states, 94 states have (on average 2.148936170212766) internal successors, (202), 186 states have internal predecessors, (202), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:06:41,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:06:41,186 INFO L93 Difference]: Finished difference Result 190 states and 201 transitions. [2021-12-21 18:06:41,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 18:06:41,187 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-12-21 18:06:41,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:06:41,196 INFO L225 Difference]: With dead ends: 190 [2021-12-21 18:06:41,196 INFO L226 Difference]: Without dead ends: 188 [2021-12-21 18:06:41,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 18:06:41,201 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:06:41,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:06:41,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-12-21 18:06:41,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2021-12-21 18:06:41,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 93 states have (on average 2.096774193548387) internal successors, (195), 184 states have internal predecessors, (195), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:06:41,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 199 transitions. [2021-12-21 18:06:41,248 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 199 transitions. Word has length 4 [2021-12-21 18:06:41,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:06:41,248 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 199 transitions. [2021-12-21 18:06:41,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:06:41,250 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 199 transitions. [2021-12-21 18:06:41,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-21 18:06:41,250 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:06:41,250 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-21 18:06:41,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-21 18:06:41,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:06:41,457 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:06:41,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:06:41,459 INFO L85 PathProgramCache]: Analyzing trace with hash 5081478, now seen corresponding path program 1 times [2021-12-21 18:06:41,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:06:41,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1804152017] [2021-12-21 18:06:41,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:06:41,461 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:06:41,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:06:41,462 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) [2021-12-21 18:06:41,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-21 18:06:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:06:41,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 18:06:41,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:06:41,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:06:41,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:06:41,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:06:41,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-21 18:06:41,650 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:06:41,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-21 18:06:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:06:41,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:06:41,668 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:06:41,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1804152017] [2021-12-21 18:06:41,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1804152017] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:06:41,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:06:41,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:06:41,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139904455] [2021-12-21 18:06:41,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:06:41,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:06:41,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:06:41,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:06:41,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:06:41,674 INFO L87 Difference]: Start difference. First operand 188 states and 199 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:06:42,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:06:42,169 INFO L93 Difference]: Finished difference Result 206 states and 220 transitions. [2021-12-21 18:06:42,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:06:42,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-12-21 18:06:42,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:06:42,172 INFO L225 Difference]: With dead ends: 206 [2021-12-21 18:06:42,173 INFO L226 Difference]: Without dead ends: 206 [2021-12-21 18:06:42,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:06:42,173 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 32 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 18:06:42,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 355 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 18:06:42,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-12-21 18:06:42,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 193. [2021-12-21 18:06:42,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 189 states have internal predecessors, (204), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:06:42,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 208 transitions. [2021-12-21 18:06:42,182 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 208 transitions. Word has length 4 [2021-12-21 18:06:42,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:06:42,183 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 208 transitions. [2021-12-21 18:06:42,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:06:42,183 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 208 transitions. [2021-12-21 18:06:42,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-21 18:06:42,183 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:06:42,183 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-21 18:06:42,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-21 18:06:42,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:06:42,391 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:06:42,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:06:42,391 INFO L85 PathProgramCache]: Analyzing trace with hash 5081477, now seen corresponding path program 1 times [2021-12-21 18:06:42,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:06:42,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915772690] [2021-12-21 18:06:42,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:06:42,397 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:06:42,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:06:42,403 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) [2021-12-21 18:06:42,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-21 18:06:42,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:06:42,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 18:06:42,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:06:42,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:06:42,484 INFO L353 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-21 18:06:42,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2021-12-21 18:06:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:06:42,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:06:42,498 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:06:42,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1915772690] [2021-12-21 18:06:42,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1915772690] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:06:42,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:06:42,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:06:42,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130917517] [2021-12-21 18:06:42,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:06:42,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:06:42,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:06:42,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:06:42,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:06:42,500 INFO L87 Difference]: Start difference. First operand 193 states and 208 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:06:42,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:06:42,808 INFO L93 Difference]: Finished difference Result 212 states and 226 transitions. [2021-12-21 18:06:42,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:06:42,809 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-12-21 18:06:42,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:06:42,809 INFO L225 Difference]: With dead ends: 212 [2021-12-21 18:06:42,809 INFO L226 Difference]: Without dead ends: 212 [2021-12-21 18:06:42,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:06:42,810 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 149 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:06:42,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 290 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 18:06:42,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-12-21 18:06:42,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 187. [2021-12-21 18:06:42,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 98 states have (on average 2.0) internal successors, (196), 183 states have internal predecessors, (196), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:06:42,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 200 transitions. [2021-12-21 18:06:42,817 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 200 transitions. Word has length 4 [2021-12-21 18:06:42,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:06:42,817 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 200 transitions. [2021-12-21 18:06:42,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:06:42,817 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 200 transitions. [2021-12-21 18:06:42,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-21 18:06:42,817 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:06:42,817 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-21 18:06:42,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-21 18:06:43,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:06:43,024 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:06:43,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:06:43,025 INFO L85 PathProgramCache]: Analyzing trace with hash 157525902, now seen corresponding path program 1 times [2021-12-21 18:06:43,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:06:43,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954125588] [2021-12-21 18:06:43,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:06:43,027 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:06:43,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:06:43,028 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) [2021-12-21 18:06:43,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-21 18:06:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:06:43,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 18:06:43,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:06:43,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:06:43,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:06:43,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:06:43,080 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:06:43,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954125588] [2021-12-21 18:06:43,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1954125588] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:06:43,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:06:43,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:06:43,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501131079] [2021-12-21 18:06:43,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:06:43,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:06:43,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:06:43,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:06:43,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:06:43,081 INFO L87 Difference]: Start difference. First operand 187 states and 200 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:06:43,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:06:43,283 INFO L93 Difference]: Finished difference Result 210 states and 223 transitions. [2021-12-21 18:06:43,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:06:43,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-12-21 18:06:43,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:06:43,284 INFO L225 Difference]: With dead ends: 210 [2021-12-21 18:06:43,284 INFO L226 Difference]: Without dead ends: 210 [2021-12-21 18:06:43,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:06:43,285 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 64 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:06:43,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 234 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:06:43,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-12-21 18:06:43,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 185. [2021-12-21 18:06:43,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 98 states have (on average 1.969387755102041) internal successors, (193), 181 states have internal predecessors, (193), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:06:43,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 197 transitions. [2021-12-21 18:06:43,292 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 197 transitions. Word has length 5 [2021-12-21 18:06:43,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:06:43,292 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 197 transitions. [2021-12-21 18:06:43,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:06:43,293 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 197 transitions. [2021-12-21 18:06:43,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-21 18:06:43,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:06:43,293 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-21 18:06:43,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-21 18:06:43,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:06:43,500 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:06:43,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:06:43,500 INFO L85 PathProgramCache]: Analyzing trace with hash 157525903, now seen corresponding path program 1 times [2021-12-21 18:06:43,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:06:43,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298989583] [2021-12-21 18:06:43,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:06:43,501 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:06:43,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:06:43,502 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) [2021-12-21 18:06:43,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-21 18:06:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:06:43,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 18:06:43,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:06:43,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:06:43,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:06:43,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:06:43,563 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:06:43,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298989583] [2021-12-21 18:06:43,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [298989583] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:06:43,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:06:43,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:06:43,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971140466] [2021-12-21 18:06:43,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:06:43,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:06:43,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:06:43,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:06:43,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:06:43,565 INFO L87 Difference]: Start difference. First operand 185 states and 197 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:06:43,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:06:43,789 INFO L93 Difference]: Finished difference Result 183 states and 194 transitions. [2021-12-21 18:06:43,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:06:43,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-12-21 18:06:43,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:06:43,790 INFO L225 Difference]: With dead ends: 183 [2021-12-21 18:06:43,790 INFO L226 Difference]: Without dead ends: 183 [2021-12-21 18:06:43,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:06:43,791 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 11 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:06:43,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 275 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:06:43,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-12-21 18:06:43,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2021-12-21 18:06:43,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 98 states have (on average 1.9387755102040816) internal successors, (190), 179 states have internal predecessors, (190), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:06:43,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 194 transitions. [2021-12-21 18:06:43,795 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 194 transitions. Word has length 5 [2021-12-21 18:06:43,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:06:43,796 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 194 transitions. [2021-12-21 18:06:43,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:06:43,796 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 194 transitions. [2021-12-21 18:06:43,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-21 18:06:43,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:06:43,796 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:06:43,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-21 18:06:44,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:06:44,003 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:06:44,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:06:44,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1322502935, now seen corresponding path program 1 times [2021-12-21 18:06:44,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:06:44,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632739921] [2021-12-21 18:06:44,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:06:44,004 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:06:44,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:06:44,005 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) [2021-12-21 18:06:44,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-21 18:06:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:06:44,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 18:06:44,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:06:44,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:06:44,132 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:06:44,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-21 18:06:44,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-21 18:06:44,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-21 18:06:44,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 18:06:44,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 18:06:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:06:44,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:06:44,244 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:06:44,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632739921] [2021-12-21 18:06:44,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632739921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:06:44,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:06:44,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 18:06:44,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670576370] [2021-12-21 18:06:44,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:06:44,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:06:44,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:06:44,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:06:44,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:06:44,246 INFO L87 Difference]: Start difference. First operand 183 states and 194 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:06:44,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:06:44,561 INFO L93 Difference]: Finished difference Result 185 states and 197 transitions. [2021-12-21 18:06:44,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 18:06:44,561 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-21 18:06:44,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:06:44,562 INFO L225 Difference]: With dead ends: 185 [2021-12-21 18:06:44,562 INFO L226 Difference]: Without dead ends: 185 [2021-12-21 18:06:44,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:06:44,563 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 5 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:06:44,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 610 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 18:06:44,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-21 18:06:44,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2021-12-21 18:06:44,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 99 states have (on average 1.9292929292929293) internal successors, (191), 180 states have internal predecessors, (191), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:06:44,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 195 transitions. [2021-12-21 18:06:44,566 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 195 transitions. Word has length 10 [2021-12-21 18:06:44,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:06:44,567 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 195 transitions. [2021-12-21 18:06:44,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:06:44,567 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 195 transitions. [2021-12-21 18:06:44,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 18:06:44,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:06:44,567 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:06:44,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-21 18:06:44,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:06:44,781 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting create_dataErr0REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:06:44,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:06:44,781 INFO L85 PathProgramCache]: Analyzing trace with hash -388286564, now seen corresponding path program 1 times [2021-12-21 18:06:44,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:06:44,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [806147079] [2021-12-21 18:06:44,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:06:44,782 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:06:44,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:06:44,784 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) [2021-12-21 18:06:44,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-21 18:06:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:06:44,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 18:06:44,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:06:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:06:44,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:06:44,883 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:06:44,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [806147079] [2021-12-21 18:06:44,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [806147079] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:06:44,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:06:44,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:06:44,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344127416] [2021-12-21 18:06:44,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:06:44,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:06:44,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:06:44,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:06:44,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:06:44,885 INFO L87 Difference]: Start difference. First operand 184 states and 195 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-12-21 18:06:44,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:06:44,908 INFO L93 Difference]: Finished difference Result 262 states and 277 transitions. [2021-12-21 18:06:44,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:06:44,908 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 12 [2021-12-21 18:06:44,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:06:44,909 INFO L225 Difference]: With dead ends: 262 [2021-12-21 18:06:44,909 INFO L226 Difference]: Without dead ends: 262 [2021-12-21 18:06:44,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:06:44,910 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 81 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:06:44,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 551 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:06:44,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-12-21 18:06:44,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 226. [2021-12-21 18:06:44,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 140 states have (on average 1.95) internal successors, (273), 221 states have internal predecessors, (273), 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) [2021-12-21 18:06:44,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 277 transitions. [2021-12-21 18:06:44,915 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 277 transitions. Word has length 12 [2021-12-21 18:06:44,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:06:44,916 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 277 transitions. [2021-12-21 18:06:44,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-12-21 18:06:44,916 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 277 transitions. [2021-12-21 18:06:44,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 18:06:44,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:06:44,917 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:06:44,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-21 18:06:45,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:06:45,124 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting create_dataErr4REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:06:45,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:06:45,125 INFO L85 PathProgramCache]: Analyzing trace with hash 848024593, now seen corresponding path program 1 times [2021-12-21 18:06:45,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:06:45,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312070628] [2021-12-21 18:06:45,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:06:45,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:06:45,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:06:45,127 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) [2021-12-21 18:06:45,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-21 18:06:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:06:45,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 18:06:45,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:06:45,221 INFO L353 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-21 18:06:45,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-12-21 18:06:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:06:45,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:06:45,234 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:06:45,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312070628] [2021-12-21 18:06:45,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312070628] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:06:45,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:06:45,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:06:45,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499234387] [2021-12-21 18:06:45,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:06:45,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:06:45,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:06:45,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:06:45,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:06:45,236 INFO L87 Difference]: Start difference. First operand 226 states and 277 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-12-21 18:06:45,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:06:45,459 INFO L93 Difference]: Finished difference Result 229 states and 273 transitions. [2021-12-21 18:06:45,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:06:45,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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 13 [2021-12-21 18:06:45,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:06:45,461 INFO L225 Difference]: With dead ends: 229 [2021-12-21 18:06:45,461 INFO L226 Difference]: Without dead ends: 229 [2021-12-21 18:06:45,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:06:45,461 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 63 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:06:45,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 204 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:06:45,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-12-21 18:06:45,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 220. [2021-12-21 18:06:45,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 146 states have (on average 1.8013698630136987) internal successors, (263), 215 states have internal predecessors, (263), 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) [2021-12-21 18:06:45,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 267 transitions. [2021-12-21 18:06:45,465 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 267 transitions. Word has length 13 [2021-12-21 18:06:45,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:06:45,466 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 267 transitions. [2021-12-21 18:06:45,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-12-21 18:06:45,466 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 267 transitions. [2021-12-21 18:06:45,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 18:06:45,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:06:45,466 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:06:45,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-21 18:06:45,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:06:45,673 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting create_dataErr5REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:06:45,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:06:45,674 INFO L85 PathProgramCache]: Analyzing trace with hash 848024594, now seen corresponding path program 1 times [2021-12-21 18:06:45,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:06:45,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75775967] [2021-12-21 18:06:45,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:06:45,675 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:06:45,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:06:45,676 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:06:45,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-21 18:06:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:06:45,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 18:06:45,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:06:45,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:06:45,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-21 18:06:45,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-21 18:06:45,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:06:45,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:06:45,803 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:06:45,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75775967] [2021-12-21 18:06:45,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75775967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:06:45,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:06:45,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:06:45,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606311039] [2021-12-21 18:06:45,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:06:45,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:06:45,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:06:45,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:06:45,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:06:45,804 INFO L87 Difference]: Start difference. First operand 220 states and 267 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-12-21 18:06:46,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:06:46,108 INFO L93 Difference]: Finished difference Result 241 states and 281 transitions. [2021-12-21 18:06:46,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:06:46,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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 13 [2021-12-21 18:06:46,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:06:46,109 INFO L225 Difference]: With dead ends: 241 [2021-12-21 18:06:46,109 INFO L226 Difference]: Without dead ends: 241 [2021-12-21 18:06:46,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:06:46,110 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 50 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:06:46,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 214 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 18:06:46,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-12-21 18:06:46,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 221. [2021-12-21 18:06:46,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 156 states have (on average 1.6474358974358974) internal successors, (257), 216 states have internal predecessors, (257), 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) [2021-12-21 18:06:46,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 261 transitions. [2021-12-21 18:06:46,114 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 261 transitions. Word has length 13 [2021-12-21 18:06:46,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:06:46,114 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 261 transitions. [2021-12-21 18:06:46,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-12-21 18:06:46,114 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 261 transitions. [2021-12-21 18:06:46,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 18:06:46,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:06:46,115 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:06:46,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-21 18:06:46,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:06:46,321 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting create_dataErr8REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:06:46,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:06:46,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1586642756, now seen corresponding path program 1 times [2021-12-21 18:06:46,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:06:46,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [411865905] [2021-12-21 18:06:46,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:06:46,322 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:06:46,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:06:46,323 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:06:46,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-21 18:06:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:06:46,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 18:06:46,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:06:46,410 INFO L353 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-21 18:06:46,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 18 [2021-12-21 18:06:46,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 18:06:46,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-12-21 18:06:46,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:06:46,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:06:46,454 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:06:46,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [411865905] [2021-12-21 18:06:46,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [411865905] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:06:46,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:06:46,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:06:46,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121800154] [2021-12-21 18:06:46,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:06:46,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:06:46,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:06:46,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:06:46,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:06:46,456 INFO L87 Difference]: Start difference. First operand 221 states and 261 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-12-21 18:06:46,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:06:46,883 INFO L93 Difference]: Finished difference Result 274 states and 327 transitions. [2021-12-21 18:06:46,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:06:46,884 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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 17 [2021-12-21 18:06:46,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:06:46,885 INFO L225 Difference]: With dead ends: 274 [2021-12-21 18:06:46,885 INFO L226 Difference]: Without dead ends: 274 [2021-12-21 18:06:46,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-21 18:06:46,886 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 26 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:06:46,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 417 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 18:06:46,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-12-21 18:06:46,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 227. [2021-12-21 18:06:46,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 162 states have (on average 1.6481481481481481) internal successors, (267), 222 states have internal predecessors, (267), 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) [2021-12-21 18:06:46,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 271 transitions. [2021-12-21 18:06:46,892 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 271 transitions. Word has length 17 [2021-12-21 18:06:46,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:06:46,892 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 271 transitions. [2021-12-21 18:06:46,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-12-21 18:06:46,892 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 271 transitions. [2021-12-21 18:06:46,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 18:06:46,892 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:06:46,892 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:06:46,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-21 18:06:47,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:06:47,099 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting create_dataErr9REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:06:47,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:06:47,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1586642755, now seen corresponding path program 1 times [2021-12-21 18:06:47,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:06:47,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510501741] [2021-12-21 18:06:47,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:06:47,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:06:47,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:06:47,101 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:06:47,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-21 18:06:47,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:06:47,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 18:06:47,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:06:47,193 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:06:47,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-21 18:06:47,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 18:06:47,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 18:06:47,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-12-21 18:06:47,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-21 18:06:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:06:47,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:06:47,285 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:06:47,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510501741] [2021-12-21 18:06:47,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510501741] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:06:47,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:06:47,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:06:47,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707075600] [2021-12-21 18:06:47,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:06:47,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:06:47,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:06:47,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:06:47,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:06:47,286 INFO L87 Difference]: Start difference. First operand 227 states and 271 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 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) [2021-12-21 18:06:47,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:06:47,756 INFO L93 Difference]: Finished difference Result 229 states and 269 transitions. [2021-12-21 18:06:47,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:06:47,757 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 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 17 [2021-12-21 18:06:47,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:06:47,758 INFO L225 Difference]: With dead ends: 229 [2021-12-21 18:06:47,758 INFO L226 Difference]: Without dead ends: 229 [2021-12-21 18:06:47,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:06:47,758 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 5 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:06:47,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 428 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 18:06:47,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-12-21 18:06:47,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2021-12-21 18:06:47,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 162 states have (on average 1.623456790123457) internal successors, (263), 222 states have internal predecessors, (263), 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) [2021-12-21 18:06:47,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 267 transitions. [2021-12-21 18:06:47,762 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 267 transitions. Word has length 17 [2021-12-21 18:06:47,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:06:47,762 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 267 transitions. [2021-12-21 18:06:47,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 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) [2021-12-21 18:06:47,763 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 267 transitions. [2021-12-21 18:06:47,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-21 18:06:47,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:06:47,763 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:06:47,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-21 18:06:47,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:06:47,971 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting create_dataErr8REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:06:47,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:06:47,971 INFO L85 PathProgramCache]: Analyzing trace with hash 509612229, now seen corresponding path program 1 times [2021-12-21 18:06:47,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:06:47,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943872374] [2021-12-21 18:06:47,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:06:47,972 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:06:47,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:06:47,973 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:06:47,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-21 18:06:48,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:06:48,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 18:06:48,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:06:48,109 INFO L353 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-21 18:06:48,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2021-12-21 18:06:48,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 18:06:48,192 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:06:48,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2021-12-21 18:06:48,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-12-21 18:06:48,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 18:06:48,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:06:48,320 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_178 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| (let ((.cse0 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse0) v_ArrVal_178) c_create_data_~data~0.base) .cse0)))) (_ bv1 1)))) is different from false [2021-12-21 18:06:48,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:06:48,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2021-12-21 18:06:48,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-12-21 18:06:48,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-21 18:06:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-21 18:06:48,390 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:06:48,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943872374] [2021-12-21 18:06:48,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943872374] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:06:48,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:06:48,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-12-21 18:06:48,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113067010] [2021-12-21 18:06:48,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:06:48,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 18:06:48,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:06:48,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 18:06:48,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=4, NotChecked=14, Total=90 [2021-12-21 18:06:48,391 INFO L87 Difference]: Start difference. First operand 227 states and 267 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 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) [2021-12-21 18:06:48,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:06:48,856 INFO L93 Difference]: Finished difference Result 234 states and 271 transitions. [2021-12-21 18:06:48,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 18:06:48,857 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 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 22 [2021-12-21 18:06:48,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:06:48,858 INFO L225 Difference]: With dead ends: 234 [2021-12-21 18:06:48,858 INFO L226 Difference]: Without dead ends: 234 [2021-12-21 18:06:48,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=60, Unknown=5, NotChecked=16, Total=110 [2021-12-21 18:06:48,858 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 28 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:06:48,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 701 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 314 Invalid, 0 Unknown, 274 Unchecked, 0.4s Time] [2021-12-21 18:06:48,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-21 18:06:48,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 226. [2021-12-21 18:06:48,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 162 states have (on average 1.6111111111111112) internal successors, (261), 221 states have internal predecessors, (261), 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) [2021-12-21 18:06:48,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 265 transitions. [2021-12-21 18:06:48,871 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 265 transitions. Word has length 22 [2021-12-21 18:06:48,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:06:48,872 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 265 transitions. [2021-12-21 18:06:48,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 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) [2021-12-21 18:06:48,872 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 265 transitions. [2021-12-21 18:06:48,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-21 18:06:48,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:06:48,872 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:06:48,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-21 18:06:49,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:06:49,080 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting create_dataErr9REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:06:49,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:06:49,080 INFO L85 PathProgramCache]: Analyzing trace with hash 509612230, now seen corresponding path program 1 times [2021-12-21 18:06:49,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:06:49,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218600569] [2021-12-21 18:06:49,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:06:49,081 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:06:49,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:06:49,090 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:06:49,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-21 18:06:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:06:49,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 18:06:49,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:06:49,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-21 18:06:49,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-21 18:06:49,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 18:06:49,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 18:06:49,388 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:06:49,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2021-12-21 18:06:49,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-21 18:06:49,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-12-21 18:06:49,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-21 18:06:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:06:49,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:06:49,829 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_222 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvmul c_create_data_~counter~0 (_ bv4 32))) (.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_222) c_create_data_~data~0.base) (bvadd (_ bv4 32) c_create_data_~data~0.offset)))) (bvule (bvadd (_ bv4 32) .cse0 .cse1) (bvadd (_ bv8 32) .cse0 .cse1)))) (forall ((v_ArrVal_222 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_223 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (bvule (bvadd (_ bv8 32) (bvmul c_create_data_~counter~0 (_ bv4 32)) (select (select (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_222) c_create_data_~data~0.base) .cse2)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_create_data_#t~mem9.base| v_ArrVal_223) c_create_data_~data~0.base) .cse2)))))) is different from false [2021-12-21 18:06:49,880 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_222 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (let ((.cse2 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse2) v_ArrVal_222) c_create_data_~data~0.base) .cse2))) (.cse1 (bvmul c_create_data_~counter~0 (_ bv4 32)))) (bvule (bvadd (_ bv4 32) .cse0 .cse1) (bvadd (_ bv8 32) .cse0 .cse1)))) (forall ((v_ArrVal_222 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_223 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse4))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| .cse3 v_ArrVal_222) c_create_data_~data~0.base) .cse4) (bvmul c_create_data_~counter~0 (_ bv4 32))) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse3 v_ArrVal_223) c_create_data_~data~0.base) .cse4))))))) is different from false [2021-12-21 18:06:49,938 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_222 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (let ((.cse1 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse1) v_ArrVal_222) c_create_data_~data~0.base) .cse1)))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_222 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_223 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse3))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| .cse2 v_ArrVal_222) c_create_data_~data~0.base) .cse3)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_223) c_create_data_~data~0.base) .cse3))))))) is different from false [2021-12-21 18:06:49,951 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:06:49,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 46 [2021-12-21 18:06:49,957 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:06:49,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2021-12-21 18:06:49,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 50 [2021-12-21 18:06:49,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 78 [2021-12-21 18:06:49,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-12-21 18:06:49,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2021-12-21 18:06:50,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:06:50,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 36 [2021-12-21 18:06:50,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 36 [2021-12-21 18:06:50,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-12-21 18:06:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-12-21 18:06:50,167 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:06:50,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218600569] [2021-12-21 18:06:50,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218600569] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:06:50,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:06:50,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-12-21 18:06:50,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468374960] [2021-12-21 18:06:50,167 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:06:50,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 18:06:50,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:06:50,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 18:06:50,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=102, Unknown=3, NotChecked=66, Total=210 [2021-12-21 18:06:50,168 INFO L87 Difference]: Start difference. First operand 226 states and 265 transitions. Second operand has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 15 states have internal predecessors, (32), 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) [2021-12-21 18:06:52,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:06:52,345 INFO L93 Difference]: Finished difference Result 238 states and 277 transitions. [2021-12-21 18:06:52,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 18:06:52,346 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 15 states have internal predecessors, (32), 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 22 [2021-12-21 18:06:52,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:06:52,347 INFO L225 Difference]: With dead ends: 238 [2021-12-21 18:06:52,347 INFO L226 Difference]: Without dead ends: 238 [2021-12-21 18:06:52,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=159, Unknown=3, NotChecked=84, Total=306 [2021-12-21 18:06:52,350 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 10 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 344 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:06:52,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1095 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 586 Invalid, 0 Unknown, 344 Unchecked, 2.0s Time] [2021-12-21 18:06:52,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-12-21 18:06:52,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2021-12-21 18:06:52,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 172 states have (on average 1.5755813953488371) internal successors, (271), 231 states have internal predecessors, (271), 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) [2021-12-21 18:06:52,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 275 transitions. [2021-12-21 18:06:52,354 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 275 transitions. Word has length 22 [2021-12-21 18:06:52,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:06:52,354 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 275 transitions. [2021-12-21 18:06:52,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 15 states have internal predecessors, (32), 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) [2021-12-21 18:06:52,354 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 275 transitions. [2021-12-21 18:06:52,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 18:06:52,354 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:06:52,354 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:06:52,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-21 18:06:52,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:06:52,555 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting create_dataErr9REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:06:52,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:06:52,555 INFO L85 PathProgramCache]: Analyzing trace with hash 2075876957, now seen corresponding path program 2 times [2021-12-21 18:06:52,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:06:52,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1102823015] [2021-12-21 18:06:52,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:06:52,556 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:06:52,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:06:52,557 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:06:52,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-21 18:06:52,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:06:52,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:06:52,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-21 18:06:52,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:06:52,797 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:06:52,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-21 18:06:52,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-21 18:06:52,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 18:06:52,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 18:06:52,976 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:06:52,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2021-12-21 18:06:52,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-21 18:06:53,097 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:06:53,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2021-12-21 18:06:53,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-21 18:06:53,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-12-21 18:06:53,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-21 18:06:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:06:53,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:06:53,527 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_285 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_285) c_create_data_~data~0.base) (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (.cse1 (bvmul c_create_data_~counter~0 (_ bv4 32)))) (bvule (bvadd .cse0 (_ bv4 32) .cse1) (bvadd .cse0 (_ bv8 32) .cse1)))) (forall ((v_ArrVal_285 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_286 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_285) c_create_data_~data~0.base) .cse2) (_ bv8 32) (bvmul c_create_data_~counter~0 (_ bv4 32))) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_create_data_#t~mem9.base| v_ArrVal_286) c_create_data_~data~0.base) .cse2)))))) is different from false [2021-12-21 18:06:53,565 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_285 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_286 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse1))) (bvule (bvadd (_ bv8 32) (bvmul c_create_data_~counter~0 (_ bv4 32)) (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_285) c_create_data_~data~0.base) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_286) c_create_data_~data~0.base) .cse1)))))) (forall ((v_ArrVal_285 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (bvmul c_create_data_~counter~0 (_ bv4 32))) (.cse3 (let ((.cse4 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse4) v_ArrVal_285) c_create_data_~data~0.base) .cse4)))) (bvule (bvadd (_ bv4 32) .cse2 .cse3) (bvadd (_ bv8 32) .cse2 .cse3))))) is different from false [2021-12-21 18:06:53,623 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_285 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvmul c_create_data_~counter~0 (_ bv4 32))) (.cse1 (let ((.cse2 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse2) v_ArrVal_285) c_create_data_~data~0.base) .cse2)))) (bvule (bvadd (_ bv8 32) .cse0 .cse1) (bvadd .cse0 (_ bv12 32) .cse1)))) (forall ((v_ArrVal_285 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_286 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse4))) (bvule (bvadd (bvmul c_create_data_~counter~0 (_ bv4 32)) (_ bv12 32) (select (select (store |c_#memory_$Pointer$.offset| .cse3 v_ArrVal_285) c_create_data_~data~0.base) .cse4)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse3 v_ArrVal_286) c_create_data_~data~0.base) .cse4))))))) is different from false [2021-12-21 18:06:53,682 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_284 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_285 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_286 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_283 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_create_data_#t~mem9.base| v_ArrVal_284)) (.cse1 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse0 (select (select .cse2 c_create_data_~data~0.base) .cse1))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_283) .cse0 v_ArrVal_285) c_create_data_~data~0.base) .cse1) (bvmul c_create_data_~counter~0 (_ bv4 32)) (_ bv12 32)) (select |c_#length| (select (select (store .cse2 .cse0 v_ArrVal_286) c_create_data_~data~0.base) .cse1)))))) (forall ((v_ArrVal_284 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_285 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_283 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (let ((.cse5 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (select (select (store (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_283) (select (select (store |c_#memory_$Pointer$.base| |c_create_data_#t~mem9.base| v_ArrVal_284) c_create_data_~data~0.base) .cse5) v_ArrVal_285) c_create_data_~data~0.base) .cse5))) (.cse4 (bvmul c_create_data_~counter~0 (_ bv4 32)))) (bvule (bvadd (_ bv8 32) .cse3 .cse4) (bvadd .cse3 .cse4 (_ bv12 32)))))) is different from false [2021-12-21 18:06:53,726 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_284 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_285 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_286 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_283 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse2))) (let ((.cse3 (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_284))) (let ((.cse1 (select (select .cse3 c_create_data_~data~0.base) .cse2))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_283) .cse1 v_ArrVal_285) c_create_data_~data~0.base) .cse2) (bvmul c_create_data_~counter~0 (_ bv4 32)) (_ bv12 32)) (select |c_#length| (select (select (store .cse3 .cse1 v_ArrVal_286) c_create_data_~data~0.base) .cse2)))))))) (forall ((v_ArrVal_284 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_285 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_283 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (let ((.cse7 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (select (select (let ((.cse6 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse7))) (store (store |c_#memory_$Pointer$.offset| .cse6 v_ArrVal_283) (select (select (store |c_#memory_$Pointer$.base| .cse6 v_ArrVal_284) c_create_data_~data~0.base) .cse7) v_ArrVal_285)) c_create_data_~data~0.base) .cse7))) (.cse5 (bvmul c_create_data_~counter~0 (_ bv4 32)))) (bvule (bvadd .cse4 (_ bv8 32) .cse5) (bvadd .cse4 .cse5 (_ bv12 32)))))) is different from false [2021-12-21 18:06:53,782 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_284 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_285 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_283 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (let ((.cse2 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (select (select (let ((.cse1 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse2))) (store (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_283) (select (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_284) c_create_data_~data~0.base) .cse2) v_ArrVal_285)) c_create_data_~data~0.base) .cse2)))) (bvule (bvadd .cse0 (_ bv8 32)) (bvadd .cse0 (_ bv12 32))))) (forall ((v_ArrVal_284 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_285 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_286 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_283 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse5 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse5))) (let ((.cse6 (store |c_#memory_$Pointer$.base| .cse3 v_ArrVal_284))) (let ((.cse4 (select (select .cse6 c_create_data_~data~0.base) .cse5))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| .cse3 v_ArrVal_283) .cse4 v_ArrVal_285) c_create_data_~data~0.base) .cse5) (_ bv12 32)) (select |c_#length| (select (select (store .cse6 .cse4 v_ArrVal_286) c_create_data_~data~0.base) .cse5))))))))) is different from false [2021-12-21 18:06:53,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:06:53,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 80 [2021-12-21 18:06:53,808 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:06:53,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 60 [2021-12-21 18:06:53,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 84 [2021-12-21 18:06:53,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 144 [2021-12-21 18:06:53,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 86 [2021-12-21 18:06:53,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 100 [2021-12-21 18:06:53,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 62 [2021-12-21 18:06:53,886 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:06:53,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 90 [2021-12-21 18:06:53,896 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:06:53,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 60 [2021-12-21 18:06:53,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:06:53,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 56 [2021-12-21 18:06:53,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:06:53,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 32 [2021-12-21 18:06:53,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-21 18:06:53,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 11 not checked. [2021-12-21 18:06:53,983 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:06:53,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1102823015] [2021-12-21 18:06:53,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1102823015] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:06:53,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:06:53,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2021-12-21 18:06:53,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963620328] [2021-12-21 18:06:53,983 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:06:53,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 18:06:53,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:06:53,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 18:06:53,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=144, Unknown=6, NotChecked=174, Total=380 [2021-12-21 18:06:53,984 INFO L87 Difference]: Start difference. First operand 236 states and 275 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 20 states have internal predecessors, (42), 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) [2021-12-21 18:06:56,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:06:56,481 INFO L93 Difference]: Finished difference Result 248 states and 287 transitions. [2021-12-21 18:06:56,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 18:06:56,482 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 20 states have internal predecessors, (42), 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 27 [2021-12-21 18:06:56,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:06:56,483 INFO L225 Difference]: With dead ends: 248 [2021-12-21 18:06:56,483 INFO L226 Difference]: Without dead ends: 248 [2021-12-21 18:06:56,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=239, Unknown=6, NotChecked=222, Total=552 [2021-12-21 18:06:56,484 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 21 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 549 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:06:56,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 1179 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 537 Invalid, 0 Unknown, 549 Unchecked, 2.0s Time] [2021-12-21 18:06:56,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-12-21 18:06:56,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 246. [2021-12-21 18:06:56,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 182 states have (on average 1.543956043956044) internal successors, (281), 241 states have internal predecessors, (281), 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) [2021-12-21 18:06:56,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 285 transitions. [2021-12-21 18:06:56,488 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 285 transitions. Word has length 27 [2021-12-21 18:06:56,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:06:56,488 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 285 transitions. [2021-12-21 18:06:56,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 20 states have internal predecessors, (42), 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) [2021-12-21 18:06:56,488 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 285 transitions. [2021-12-21 18:06:56,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-21 18:06:56,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:06:56,488 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:06:56,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-21 18:06:56,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:06:56,696 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting create_dataErr9REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:06:56,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:06:56,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1508640986, now seen corresponding path program 3 times [2021-12-21 18:06:56,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:06:56,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1052683567] [2021-12-21 18:06:56,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 18:06:56,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:06:56,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:06:56,698 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:06:56,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-21 18:06:57,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-21 18:06:57,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:06:57,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 18:06:57,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:06:57,091 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:06:57,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:06:57,185 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:06:57,185 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:06:57,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1052683567] [2021-12-21 18:06:57,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1052683567] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:06:57,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:06:57,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-21 18:06:57,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889859555] [2021-12-21 18:06:57,185 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:06:57,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 18:06:57,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:06:57,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 18:06:57,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:06:57,186 INFO L87 Difference]: Start difference. First operand 246 states and 285 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 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) [2021-12-21 18:06:57,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:06:57,281 INFO L93 Difference]: Finished difference Result 243 states and 279 transitions. [2021-12-21 18:06:57,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 18:06:57,282 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 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 32 [2021-12-21 18:06:57,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:06:57,283 INFO L225 Difference]: With dead ends: 243 [2021-12-21 18:06:57,283 INFO L226 Difference]: Without dead ends: 243 [2021-12-21 18:06:57,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:06:57,283 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 48 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:06:57,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 1247 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:06:57,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-21 18:06:57,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 241. [2021-12-21 18:06:57,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 178 states have (on average 1.5337078651685394) internal successors, (273), 236 states have internal predecessors, (273), 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) [2021-12-21 18:06:57,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 277 transitions. [2021-12-21 18:06:57,287 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 277 transitions. Word has length 32 [2021-12-21 18:06:57,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:06:57,287 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 277 transitions. [2021-12-21 18:06:57,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 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) [2021-12-21 18:06:57,290 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 277 transitions. [2021-12-21 18:06:57,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-21 18:06:57,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:06:57,294 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:06:57,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-21 18:06:57,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:06:57,495 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting create_dataErr24REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:06:57,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:06:57,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1091018630, now seen corresponding path program 1 times [2021-12-21 18:06:57,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:06:57,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [951491196] [2021-12-21 18:06:57,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:06:57,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:06:57,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:06:57,497 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:06:57,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-21 18:06:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:06:57,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 18:06:57,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:06:57,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:06:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 18:06:57,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:06:57,677 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:06:57,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [951491196] [2021-12-21 18:06:57,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [951491196] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:06:57,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:06:57,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:06:57,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341904181] [2021-12-21 18:06:57,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:06:57,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:06:57,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:06:57,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:06:57,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:06:57,678 INFO L87 Difference]: Start difference. First operand 241 states and 277 transitions. Second operand has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 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) [2021-12-21 18:06:57,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:06:57,848 INFO L93 Difference]: Finished difference Result 243 states and 271 transitions. [2021-12-21 18:06:57,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:06:57,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 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 42 [2021-12-21 18:06:57,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:06:57,849 INFO L225 Difference]: With dead ends: 243 [2021-12-21 18:06:57,849 INFO L226 Difference]: Without dead ends: 243 [2021-12-21 18:06:57,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:06:57,850 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 22 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:06:57,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 235 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:06:57,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-21 18:06:57,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 237. [2021-12-21 18:06:57,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 178 states have (on average 1.4662921348314606) internal successors, (261), 232 states have internal predecessors, (261), 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) [2021-12-21 18:06:57,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 265 transitions. [2021-12-21 18:06:57,854 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 265 transitions. Word has length 42 [2021-12-21 18:06:57,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:06:57,854 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 265 transitions. [2021-12-21 18:06:57,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 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) [2021-12-21 18:06:57,854 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 265 transitions. [2021-12-21 18:06:57,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-21 18:06:57,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:06:57,854 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:06:57,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-21 18:06:58,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:06:58,063 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting create_dataErr25REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:06:58,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:06:58,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1091018631, now seen corresponding path program 1 times [2021-12-21 18:06:58,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:06:58,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649298118] [2021-12-21 18:06:58,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:06:58,063 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:06:58,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:06:58,064 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:06:58,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-21 18:06:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:06:58,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 18:06:58,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:06:58,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:06:58,259 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 18:06:58,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:06:58,259 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:06:58,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649298118] [2021-12-21 18:06:58,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649298118] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:06:58,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:06:58,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:06:58,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247116056] [2021-12-21 18:06:58,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:06:58,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:06:58,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:06:58,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:06:58,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:06:58,261 INFO L87 Difference]: Start difference. First operand 237 states and 265 transitions. Second operand has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 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) [2021-12-21 18:06:58,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:06:58,464 INFO L93 Difference]: Finished difference Result 239 states and 259 transitions. [2021-12-21 18:06:58,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:06:58,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 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 42 [2021-12-21 18:06:58,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:06:58,465 INFO L225 Difference]: With dead ends: 239 [2021-12-21 18:06:58,465 INFO L226 Difference]: Without dead ends: 239 [2021-12-21 18:06:58,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:06:58,466 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 18 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:06:58,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 234 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:06:58,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-12-21 18:06:58,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 233. [2021-12-21 18:06:58,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 178 states have (on average 1.398876404494382) internal successors, (249), 228 states have internal predecessors, (249), 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) [2021-12-21 18:06:58,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 253 transitions. [2021-12-21 18:06:58,480 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 253 transitions. Word has length 42 [2021-12-21 18:06:58,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:06:58,480 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 253 transitions. [2021-12-21 18:06:58,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 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) [2021-12-21 18:06:58,481 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 253 transitions. [2021-12-21 18:06:58,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 18:06:58,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:06:58,481 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:06:58,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-21 18:06:58,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:06:58,692 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:06:58,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:06:58,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1777365236, now seen corresponding path program 1 times [2021-12-21 18:06:58,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:06:58,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [499291438] [2021-12-21 18:06:58,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:06:58,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:06:58,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:06:58,694 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:06:58,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-21 18:06:58,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:06:58,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 18:06:58,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:06:58,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:06:58,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 18:06:59,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-12-21 18:06:59,260 INFO L353 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-12-21 18:06:59,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 36 [2021-12-21 18:06:59,356 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 18:06:59,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:07:01,435 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:07:01,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [499291438] [2021-12-21 18:07:01,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [499291438] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:07:01,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1693394367] [2021-12-21 18:07:01,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:01,435 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-21 18:07:01,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-21 18:07:01,437 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-21 18:07:01,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-12-21 18:07:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:01,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 18:07:01,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:07:01,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:07:08,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:07:08,023 INFO L353 Elim1Store]: treesize reduction 24, result has 46.7 percent of original size [2021-12-21 18:07:08,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2021-12-21 18:07:08,039 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 18:07:08,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:07:08,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1693394367] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:08,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:07:08,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-12-21 18:07:08,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565308068] [2021-12-21 18:07:08,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:08,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 18:07:08,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:07:08,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 18:07:08,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=77, Unknown=4, NotChecked=0, Total=110 [2021-12-21 18:07:08,040 INFO L87 Difference]: Start difference. First operand 233 states and 253 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 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) [2021-12-21 18:07:08,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:08,248 INFO L93 Difference]: Finished difference Result 294 states and 323 transitions. [2021-12-21 18:07:08,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:07:08,249 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 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 45 [2021-12-21 18:07:08,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:08,250 INFO L225 Difference]: With dead ends: 294 [2021-12-21 18:07:08,250 INFO L226 Difference]: Without dead ends: 294 [2021-12-21 18:07:08,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=29, Invalid=77, Unknown=4, NotChecked=0, Total=110 [2021-12-21 18:07:08,250 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 76 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:08,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 474 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 144 Invalid, 0 Unknown, 151 Unchecked, 0.2s Time] [2021-12-21 18:07:08,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-12-21 18:07:08,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 249. [2021-12-21 18:07:08,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 192 states have (on average 1.4010416666666667) internal successors, (269), 242 states have internal predecessors, (269), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 18:07:08,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 275 transitions. [2021-12-21 18:07:08,254 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 275 transitions. Word has length 45 [2021-12-21 18:07:08,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:08,254 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 275 transitions. [2021-12-21 18:07:08,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 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) [2021-12-21 18:07:08,254 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 275 transitions. [2021-12-21 18:07:08,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 18:07:08,255 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:08,255 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:08,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-12-21 18:07:08,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-21 18:07:08,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:07:08,655 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:07:08,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:08,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1777365235, now seen corresponding path program 1 times [2021-12-21 18:07:08,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:07:08,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490256076] [2021-12-21 18:07:08,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:08,656 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:07:08,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:07:08,657 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:07:08,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-21 18:07:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:08,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 18:07:08,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:07:08,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:07:08,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:07:09,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 18:07:09,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-12-21 18:07:09,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:07:09,301 INFO L353 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-12-21 18:07:09,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2021-12-21 18:07:09,310 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:07:09,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-21 18:07:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 18:07:09,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:07:10,457 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:07:10,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490256076] [2021-12-21 18:07:10,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490256076] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:07:10,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1069294224] [2021-12-21 18:07:10,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:10,457 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-21 18:07:10,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-21 18:07:10,458 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-21 18:07:10,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-12-21 18:07:10,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:10,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 18:07:10,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:07:10,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:07:11,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:07:11,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:07:11,354 INFO L353 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-12-21 18:07:11,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2021-12-21 18:07:11,363 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:07:11,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-21 18:07:11,390 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 18:07:11,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:07:11,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1069294224] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:11,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:07:11,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-12-21 18:07:11,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170594860] [2021-12-21 18:07:11,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:11,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:07:11,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:07:11,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:07:11,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:07:11,391 INFO L87 Difference]: Start difference. First operand 249 states and 275 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2021-12-21 18:07:11,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:11,749 INFO L93 Difference]: Finished difference Result 317 states and 348 transitions. [2021-12-21 18:07:11,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 18:07:11,750 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 45 [2021-12-21 18:07:11,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:11,751 INFO L225 Difference]: With dead ends: 317 [2021-12-21 18:07:11,751 INFO L226 Difference]: Without dead ends: 317 [2021-12-21 18:07:11,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:07:11,751 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 72 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:11,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 458 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 248 Invalid, 0 Unknown, 196 Unchecked, 0.3s Time] [2021-12-21 18:07:11,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-12-21 18:07:11,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 249. [2021-12-21 18:07:11,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 192 states have (on average 1.390625) internal successors, (267), 242 states have internal predecessors, (267), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 18:07:11,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 273 transitions. [2021-12-21 18:07:11,758 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 273 transitions. Word has length 45 [2021-12-21 18:07:11,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:11,759 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 273 transitions. [2021-12-21 18:07:11,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2021-12-21 18:07:11,759 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 273 transitions. [2021-12-21 18:07:11,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-21 18:07:11,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:11,761 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:11,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-12-21 18:07:11,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-21 18:07:12,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:07:12,166 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:07:12,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:12,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1240596815, now seen corresponding path program 1 times [2021-12-21 18:07:12,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:07:12,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15103233] [2021-12-21 18:07:12,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:12,167 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:07:12,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:07:12,168 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:07:12,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-21 18:07:12,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:12,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 18:07:12,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:07:12,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:07:12,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:07:12,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:07:12,535 INFO L353 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-12-21 18:07:12,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-12-21 18:07:12,597 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-12-21 18:07:12,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-12-21 18:07:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 18:07:12,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:07:12,631 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:07:12,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15103233] [2021-12-21 18:07:12,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15103233] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:12,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:07:12,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 18:07:12,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545925070] [2021-12-21 18:07:12,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:12,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:07:12,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:07:12,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:07:12,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:07:12,633 INFO L87 Difference]: Start difference. First operand 249 states and 273 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 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) [2021-12-21 18:07:12,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:12,959 INFO L93 Difference]: Finished difference Result 293 states and 325 transitions. [2021-12-21 18:07:12,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 18:07:12,960 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 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 47 [2021-12-21 18:07:12,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:12,961 INFO L225 Difference]: With dead ends: 293 [2021-12-21 18:07:12,961 INFO L226 Difference]: Without dead ends: 293 [2021-12-21 18:07:12,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:07:12,962 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 27 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:12,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 711 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:07:12,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-12-21 18:07:12,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 259. [2021-12-21 18:07:12,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 202 states have (on average 1.3762376237623761) internal successors, (278), 252 states have internal predecessors, (278), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 18:07:12,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 284 transitions. [2021-12-21 18:07:12,966 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 284 transitions. Word has length 47 [2021-12-21 18:07:12,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:12,966 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 284 transitions. [2021-12-21 18:07:12,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 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) [2021-12-21 18:07:12,967 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 284 transitions. [2021-12-21 18:07:12,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-21 18:07:12,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:12,967 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:12,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-12-21 18:07:13,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:07:13,176 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:07:13,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:13,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1147840785, now seen corresponding path program 1 times [2021-12-21 18:07:13,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:07:13,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989553155] [2021-12-21 18:07:13,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:13,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:07:13,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:07:13,178 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:07:13,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-21 18:07:13,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:13,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 18:07:13,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:07:13,419 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 18:07:13,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:07:13,419 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:07:13,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989553155] [2021-12-21 18:07:13,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989553155] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:13,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:07:13,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:07:13,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995395057] [2021-12-21 18:07:13,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:13,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:07:13,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:07:13,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:07:13,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:07:13,421 INFO L87 Difference]: Start difference. First operand 259 states and 284 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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) [2021-12-21 18:07:13,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:13,434 INFO L93 Difference]: Finished difference Result 267 states and 290 transitions. [2021-12-21 18:07:13,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:07:13,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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 47 [2021-12-21 18:07:13,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:13,460 INFO L225 Difference]: With dead ends: 267 [2021-12-21 18:07:13,460 INFO L226 Difference]: Without dead ends: 267 [2021-12-21 18:07:13,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:07:13,461 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 3 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:13,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 458 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:07:13,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-12-21 18:07:13,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2021-12-21 18:07:13,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 208 states have (on average 1.3557692307692308) internal successors, (282), 258 states have internal predecessors, (282), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 18:07:13,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 288 transitions. [2021-12-21 18:07:13,465 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 288 transitions. Word has length 47 [2021-12-21 18:07:13,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:13,465 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 288 transitions. [2021-12-21 18:07:13,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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) [2021-12-21 18:07:13,466 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 288 transitions. [2021-12-21 18:07:13,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-21 18:07:13,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:13,466 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:13,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-12-21 18:07:13,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:07:13,675 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:07:13,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:13,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1348996156, now seen corresponding path program 1 times [2021-12-21 18:07:13,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:07:13,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [695084664] [2021-12-21 18:07:13,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:13,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:07:13,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:07:13,677 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:07:13,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-21 18:07:13,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:13,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 18:07:13,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:07:14,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 18:07:14,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-12-21 18:07:14,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:07:14,396 INFO L353 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-12-21 18:07:14,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 29 [2021-12-21 18:07:14,407 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:07:14,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-21 18:07:14,480 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 18:07:14,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:07:16,674 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:07:16,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [695084664] [2021-12-21 18:07:16,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [695084664] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:07:16,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1678632119] [2021-12-21 18:07:16,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:16,675 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-21 18:07:16,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-21 18:07:16,676 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-21 18:07:16,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-12-21 18:07:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:17,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-21 18:07:17,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:07:17,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:07:17,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:07:17,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-21 18:07:17,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 18:07:18,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:07:18,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:07:18,547 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:07:18,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 28 [2021-12-21 18:07:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 18:07:18,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:07:18,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1678632119] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:18,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:07:18,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2021-12-21 18:07:18,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651354830] [2021-12-21 18:07:18,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:18,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:07:18,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:07:18,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:07:18,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=258, Unknown=1, NotChecked=0, Total=306 [2021-12-21 18:07:18,657 INFO L87 Difference]: Start difference. First operand 265 states and 288 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 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) [2021-12-21 18:07:19,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:19,037 INFO L93 Difference]: Finished difference Result 305 states and 332 transitions. [2021-12-21 18:07:19,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 18:07:19,037 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 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 47 [2021-12-21 18:07:19,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:19,038 INFO L225 Difference]: With dead ends: 305 [2021-12-21 18:07:19,038 INFO L226 Difference]: Without dead ends: 305 [2021-12-21 18:07:19,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=60, Invalid=319, Unknown=1, NotChecked=0, Total=380 [2021-12-21 18:07:19,039 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 11 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:19,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 476 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 151 Unchecked, 0.3s Time] [2021-12-21 18:07:19,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-12-21 18:07:19,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 304. [2021-12-21 18:07:19,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 245 states have (on average 1.3142857142857143) internal successors, (322), 295 states have internal predecessors, (322), 3 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-21 18:07:19,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 331 transitions. [2021-12-21 18:07:19,044 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 331 transitions. Word has length 47 [2021-12-21 18:07:19,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:19,044 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 331 transitions. [2021-12-21 18:07:19,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 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) [2021-12-21 18:07:19,045 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 331 transitions. [2021-12-21 18:07:19,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-21 18:07:19,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:19,045 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:19,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-12-21 18:07:19,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-12-21 18:07:19,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-21 18:07:19,453 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:07:19,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:19,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1348996155, now seen corresponding path program 1 times [2021-12-21 18:07:19,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:07:19,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1006674430] [2021-12-21 18:07:19,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:19,453 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:07:19,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:07:19,454 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:07:19,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-21 18:07:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:19,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 18:07:19,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:07:19,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 18:07:19,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-12-21 18:07:20,007 INFO L353 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-12-21 18:07:20,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 36 [2021-12-21 18:07:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 18:07:20,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:07:22,183 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:07:22,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1006674430] [2021-12-21 18:07:22,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1006674430] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:07:22,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [930253797] [2021-12-21 18:07:22,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:22,184 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-21 18:07:22,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-21 18:07:22,185 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-21 18:07:22,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-12-21 18:07:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:22,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 18:07:22,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:07:22,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-21 18:07:23,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:07:23,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:07:23,686 INFO L353 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-21 18:07:23,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 26 [2021-12-21 18:07:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 18:07:23,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:07:23,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [930253797] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:23,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:07:23,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2021-12-21 18:07:23,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231654059] [2021-12-21 18:07:23,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:23,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:07:23,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:07:23,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:07:23,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=147, Unknown=1, NotChecked=0, Total=182 [2021-12-21 18:07:23,750 INFO L87 Difference]: Start difference. First operand 304 states and 331 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 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) [2021-12-21 18:07:23,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:23,987 INFO L93 Difference]: Finished difference Result 305 states and 331 transitions. [2021-12-21 18:07:23,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 18:07:23,988 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 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 47 [2021-12-21 18:07:23,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:23,989 INFO L225 Difference]: With dead ends: 305 [2021-12-21 18:07:23,989 INFO L226 Difference]: Without dead ends: 305 [2021-12-21 18:07:23,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=46, Invalid=193, Unknown=1, NotChecked=0, Total=240 [2021-12-21 18:07:23,989 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 11 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:23,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 637 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 144 Unchecked, 0.2s Time] [2021-12-21 18:07:23,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-12-21 18:07:23,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 304. [2021-12-21 18:07:23,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 245 states have (on average 1.310204081632653) internal successors, (321), 295 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-21 18:07:23,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 330 transitions. [2021-12-21 18:07:23,993 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 330 transitions. Word has length 47 [2021-12-21 18:07:23,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:23,993 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 330 transitions. [2021-12-21 18:07:23,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 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) [2021-12-21 18:07:23,994 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 330 transitions. [2021-12-21 18:07:23,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-21 18:07:23,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:23,994 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:24,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2021-12-21 18:07:24,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-21 18:07:24,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:07:24,408 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:07:24,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:24,408 INFO L85 PathProgramCache]: Analyzing trace with hash 10765426, now seen corresponding path program 1 times [2021-12-21 18:07:24,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:07:24,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1685851305] [2021-12-21 18:07:24,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:24,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:07:24,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:07:24,411 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:07:24,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-21 18:07:24,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:24,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 18:07:24,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:07:24,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:07:24,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 18:07:24,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-12-21 18:07:25,086 INFO L353 Elim1Store]: treesize reduction 42, result has 33.3 percent of original size [2021-12-21 18:07:25,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 32 [2021-12-21 18:07:25,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 18:07:25,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:07:29,196 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:07:29,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1685851305] [2021-12-21 18:07:29,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1685851305] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:07:29,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [530699662] [2021-12-21 18:07:29,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:29,197 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-21 18:07:29,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-21 18:07:29,198 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-21 18:07:29,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-12-21 18:07:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:29,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 18:07:29,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:07:29,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:07:31,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:07:32,004 INFO L353 Elim1Store]: treesize reduction 24, result has 46.7 percent of original size [2021-12-21 18:07:32,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2021-12-21 18:07:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 18:07:32,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:07:32,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [530699662] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:32,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:07:32,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 10 [2021-12-21 18:07:32,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511085003] [2021-12-21 18:07:32,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:32,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 18:07:32,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:07:32,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 18:07:32,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=96, Unknown=3, NotChecked=0, Total=132 [2021-12-21 18:07:32,039 INFO L87 Difference]: Start difference. First operand 304 states and 330 transitions. Second operand has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 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) [2021-12-21 18:07:32,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:32,323 INFO L93 Difference]: Finished difference Result 356 states and 388 transitions. [2021-12-21 18:07:32,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:07:32,324 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 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 49 [2021-12-21 18:07:32,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:32,326 INFO L225 Difference]: With dead ends: 356 [2021-12-21 18:07:32,326 INFO L226 Difference]: Without dead ends: 356 [2021-12-21 18:07:32,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=33, Invalid=96, Unknown=3, NotChecked=0, Total=132 [2021-12-21 18:07:32,329 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 75 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:32,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 485 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 143 Invalid, 0 Unknown, 178 Unchecked, 0.3s Time] [2021-12-21 18:07:32,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-12-21 18:07:32,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 315. [2021-12-21 18:07:32,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 255 states have (on average 1.3098039215686275) internal successors, (334), 305 states have internal predecessors, (334), 3 states have call successors, (3), 3 states have call predecessors, (3), 6 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 18:07:32,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 345 transitions. [2021-12-21 18:07:32,335 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 345 transitions. Word has length 49 [2021-12-21 18:07:32,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:32,336 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 345 transitions. [2021-12-21 18:07:32,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 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) [2021-12-21 18:07:32,336 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 345 transitions. [2021-12-21 18:07:32,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-21 18:07:32,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:32,336 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:32,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-12-21 18:07:32,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-12-21 18:07:32,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:07:32,750 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:07:32,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:32,750 INFO L85 PathProgramCache]: Analyzing trace with hash 10765427, now seen corresponding path program 1 times [2021-12-21 18:07:32,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:07:32,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468740977] [2021-12-21 18:07:32,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:32,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:07:32,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:07:32,752 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:07:32,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-21 18:07:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:33,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 18:07:33,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:07:33,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:07:33,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:07:33,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 18:07:33,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-12-21 18:07:33,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:07:33,514 INFO L353 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-12-21 18:07:33,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2021-12-21 18:07:33,524 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:07:33,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-21 18:07:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 18:07:33,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:07:35,721 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:07:35,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468740977] [2021-12-21 18:07:35,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1468740977] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:07:35,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [991773138] [2021-12-21 18:07:35,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:35,721 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-21 18:07:35,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-21 18:07:35,722 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-21 18:07:35,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-12-21 18:07:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:36,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 18:07:36,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:07:36,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:07:36,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:07:36,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:07:36,813 INFO L353 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-12-21 18:07:36,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2021-12-21 18:07:36,823 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:07:36,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-21 18:07:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 18:07:36,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:07:36,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [991773138] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:36,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:07:36,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 8 [2021-12-21 18:07:36,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802015878] [2021-12-21 18:07:36,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:36,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 18:07:36,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:07:36,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 18:07:36,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=83, Unknown=1, NotChecked=0, Total=110 [2021-12-21 18:07:36,851 INFO L87 Difference]: Start difference. First operand 315 states and 345 transitions. Second operand has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 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) [2021-12-21 18:07:37,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:37,251 INFO L93 Difference]: Finished difference Result 380 states and 414 transitions. [2021-12-21 18:07:37,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:07:37,252 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 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 49 [2021-12-21 18:07:37,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:37,253 INFO L225 Difference]: With dead ends: 380 [2021-12-21 18:07:37,253 INFO L226 Difference]: Without dead ends: 380 [2021-12-21 18:07:37,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=26, Invalid=83, Unknown=1, NotChecked=0, Total=110 [2021-12-21 18:07:37,254 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 72 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 321 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:37,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 553 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 248 Invalid, 0 Unknown, 321 Unchecked, 0.4s Time] [2021-12-21 18:07:37,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-12-21 18:07:37,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 314. [2021-12-21 18:07:37,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 254 states have (on average 1.3070866141732282) internal successors, (332), 305 states have internal predecessors, (332), 3 states have call successors, (3), 3 states have call predecessors, (3), 6 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 18:07:37,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 343 transitions. [2021-12-21 18:07:37,259 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 343 transitions. Word has length 49 [2021-12-21 18:07:37,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:37,260 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 343 transitions. [2021-12-21 18:07:37,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 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) [2021-12-21 18:07:37,260 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 343 transitions. [2021-12-21 18:07:37,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-21 18:07:37,260 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:37,260 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:37,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-12-21 18:07:37,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-12-21 18:07:37,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-21 18:07:37,665 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:07:37,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:37,666 INFO L85 PathProgramCache]: Analyzing trace with hash -694813700, now seen corresponding path program 1 times [2021-12-21 18:07:37,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:07:37,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158208664] [2021-12-21 18:07:37,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:37,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:07:37,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:07:37,668 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:07:37,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-12-21 18:07:37,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:37,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 18:07:37,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:07:37,932 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 18:07:37,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:07:37,932 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:07:37,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158208664] [2021-12-21 18:07:37,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158208664] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:37,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:07:37,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:07:37,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447178720] [2021-12-21 18:07:37,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:37,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:07:37,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:07:37,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:07:37,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:07:37,934 INFO L87 Difference]: Start difference. First operand 314 states and 343 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 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) [2021-12-21 18:07:38,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:38,137 INFO L93 Difference]: Finished difference Result 313 states and 342 transitions. [2021-12-21 18:07:38,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:07:38,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 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 49 [2021-12-21 18:07:38,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:38,139 INFO L225 Difference]: With dead ends: 313 [2021-12-21 18:07:38,139 INFO L226 Difference]: Without dead ends: 313 [2021-12-21 18:07:38,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:07:38,139 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 140 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:38,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 220 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:07:38,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-12-21 18:07:38,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2021-12-21 18:07:38,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 254 states have (on average 1.3031496062992125) internal successors, (331), 304 states have internal predecessors, (331), 3 states have call successors, (3), 3 states have call predecessors, (3), 6 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 18:07:38,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 342 transitions. [2021-12-21 18:07:38,144 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 342 transitions. Word has length 49 [2021-12-21 18:07:38,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:38,144 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 342 transitions. [2021-12-21 18:07:38,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 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) [2021-12-21 18:07:38,144 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 342 transitions. [2021-12-21 18:07:38,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-21 18:07:38,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:38,144 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:38,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-12-21 18:07:38,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:07:38,345 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:07:38,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:38,345 INFO L85 PathProgramCache]: Analyzing trace with hash -694813699, now seen corresponding path program 1 times [2021-12-21 18:07:38,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:07:38,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1395721268] [2021-12-21 18:07:38,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:38,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:07:38,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:07:38,356 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:07:38,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-12-21 18:07:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:38,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 18:07:38,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:07:38,747 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 18:07:38,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:07:38,747 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:07:38,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1395721268] [2021-12-21 18:07:38,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1395721268] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:38,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:07:38,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:07:38,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474328664] [2021-12-21 18:07:38,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:38,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:07:38,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:07:38,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:07:38,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:07:38,749 INFO L87 Difference]: Start difference. First operand 313 states and 342 transitions. Second operand has 5 states, 4 states have (on average 9.25) internal successors, (37), 5 states have internal predecessors, (37), 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) [2021-12-21 18:07:39,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:39,037 INFO L93 Difference]: Finished difference Result 304 states and 333 transitions. [2021-12-21 18:07:39,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:07:39,038 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.25) internal successors, (37), 5 states have internal predecessors, (37), 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 49 [2021-12-21 18:07:39,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:39,039 INFO L225 Difference]: With dead ends: 304 [2021-12-21 18:07:39,039 INFO L226 Difference]: Without dead ends: 304 [2021-12-21 18:07:39,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:07:39,040 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 151 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:39,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 217 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 18:07:39,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-12-21 18:07:39,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2021-12-21 18:07:39,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 254 states have (on average 1.2677165354330708) internal successors, (322), 295 states have internal predecessors, (322), 3 states have call successors, (3), 3 states have call predecessors, (3), 6 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 18:07:39,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 333 transitions. [2021-12-21 18:07:39,043 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 333 transitions. Word has length 49 [2021-12-21 18:07:39,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:39,044 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 333 transitions. [2021-12-21 18:07:39,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.25) internal successors, (37), 5 states have internal predecessors, (37), 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) [2021-12-21 18:07:39,044 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 333 transitions. [2021-12-21 18:07:39,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-21 18:07:39,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:39,044 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:39,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-12-21 18:07:39,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:07:39,252 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:07:39,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:39,252 INFO L85 PathProgramCache]: Analyzing trace with hash -64388068, now seen corresponding path program 1 times [2021-12-21 18:07:39,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:07:39,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544160864] [2021-12-21 18:07:39,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:39,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:07:39,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:07:39,254 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:07:39,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-12-21 18:07:39,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:39,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 18:07:39,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:07:39,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 18:07:39,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-21 18:07:39,593 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 18:07:39,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:07:39,593 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:07:39,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544160864] [2021-12-21 18:07:39,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544160864] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:39,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:07:39,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:07:39,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255360653] [2021-12-21 18:07:39,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:39,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:07:39,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:07:39,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:07:39,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:07:39,594 INFO L87 Difference]: Start difference. First operand 304 states and 333 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 states have internal predecessors, (38), 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) [2021-12-21 18:07:40,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:40,012 INFO L93 Difference]: Finished difference Result 325 states and 355 transitions. [2021-12-21 18:07:40,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 18:07:40,013 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 states have internal predecessors, (38), 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 50 [2021-12-21 18:07:40,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:40,014 INFO L225 Difference]: With dead ends: 325 [2021-12-21 18:07:40,014 INFO L226 Difference]: Without dead ends: 325 [2021-12-21 18:07:40,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:07:40,014 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 150 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:40,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 364 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 18:07:40,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-12-21 18:07:40,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 303. [2021-12-21 18:07:40,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 254 states have (on average 1.263779527559055) internal successors, (321), 294 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 6 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 18:07:40,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 332 transitions. [2021-12-21 18:07:40,018 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 332 transitions. Word has length 50 [2021-12-21 18:07:40,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:40,019 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 332 transitions. [2021-12-21 18:07:40,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 states have internal predecessors, (38), 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) [2021-12-21 18:07:40,019 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 332 transitions. [2021-12-21 18:07:40,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-21 18:07:40,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:40,019 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:40,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-12-21 18:07:40,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:07:40,234 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:07:40,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:40,235 INFO L85 PathProgramCache]: Analyzing trace with hash -64388067, now seen corresponding path program 1 times [2021-12-21 18:07:40,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:07:40,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190457086] [2021-12-21 18:07:40,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:40,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:07:40,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:07:40,236 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:07:40,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-12-21 18:07:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:40,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-21 18:07:40,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:07:40,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 18:07:40,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 18:07:40,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-21 18:07:40,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 18:07:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 18:07:40,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:07:40,673 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:07:40,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190457086] [2021-12-21 18:07:40,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190457086] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:40,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:07:40,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:07:40,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632504486] [2021-12-21 18:07:40,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:40,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:07:40,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:07:40,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:07:40,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:07:40,674 INFO L87 Difference]: Start difference. First operand 303 states and 332 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 states have internal predecessors, (38), 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) [2021-12-21 18:07:41,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:41,182 INFO L93 Difference]: Finished difference Result 341 states and 371 transitions. [2021-12-21 18:07:41,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 18:07:41,183 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 states have internal predecessors, (38), 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 50 [2021-12-21 18:07:41,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:41,184 INFO L225 Difference]: With dead ends: 341 [2021-12-21 18:07:41,184 INFO L226 Difference]: Without dead ends: 341 [2021-12-21 18:07:41,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:07:41,184 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 181 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:41,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 348 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 18:07:41,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-12-21 18:07:41,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 302. [2021-12-21 18:07:41,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 254 states have (on average 1.2598425196850394) internal successors, (320), 293 states have internal predecessors, (320), 3 states have call successors, (3), 3 states have call predecessors, (3), 6 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 18:07:41,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 331 transitions. [2021-12-21 18:07:41,188 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 331 transitions. Word has length 50 [2021-12-21 18:07:41,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:41,188 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 331 transitions. [2021-12-21 18:07:41,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 states have internal predecessors, (38), 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) [2021-12-21 18:07:41,188 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 331 transitions. [2021-12-21 18:07:41,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-21 18:07:41,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:41,189 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:41,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-12-21 18:07:41,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:07:41,397 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:07:41,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:41,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1755643938, now seen corresponding path program 1 times [2021-12-21 18:07:41,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:07:41,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542985593] [2021-12-21 18:07:41,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:41,398 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:07:41,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:07:41,408 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:07:41,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-12-21 18:07:41,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:41,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 18:07:41,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:07:41,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 18:07:41,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-12-21 18:07:42,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:07:42,347 INFO L353 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-12-21 18:07:42,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 29 [2021-12-21 18:07:42,358 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:07:42,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-21 18:07:42,500 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 18:07:42,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:07:43,063 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:07:43,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542985593] [2021-12-21 18:07:43,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542985593] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:07:43,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1262375944] [2021-12-21 18:07:43,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:43,063 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-21 18:07:43,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-21 18:07:43,064 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-21 18:07:43,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-12-21 18:07:43,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:43,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-21 18:07:43,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:07:43,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:07:43,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:07:43,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-21 18:07:43,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 18:07:45,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:07:45,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:07:45,222 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:07:45,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 28 [2021-12-21 18:07:45,333 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 18:07:45,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:07:45,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1262375944] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:45,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:07:45,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2021-12-21 18:07:45,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698046491] [2021-12-21 18:07:45,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:45,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:07:45,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:07:45,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:07:45,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-12-21 18:07:45,334 INFO L87 Difference]: Start difference. First operand 302 states and 331 transitions. Second operand has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 8 states have internal predecessors, (39), 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) [2021-12-21 18:07:45,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:45,642 INFO L93 Difference]: Finished difference Result 320 states and 351 transitions. [2021-12-21 18:07:45,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 18:07:45,643 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 8 states have internal predecessors, (39), 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 51 [2021-12-21 18:07:45,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:45,644 INFO L225 Difference]: With dead ends: 320 [2021-12-21 18:07:45,644 INFO L226 Difference]: Without dead ends: 320 [2021-12-21 18:07:45,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-12-21 18:07:45,645 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 13 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:45,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 459 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 122 Unchecked, 0.2s Time] [2021-12-21 18:07:45,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-12-21 18:07:45,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 312. [2021-12-21 18:07:45,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 264 states have (on average 1.2575757575757576) internal successors, (332), 302 states have internal predecessors, (332), 3 states have call successors, (3), 3 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 18:07:45,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 342 transitions. [2021-12-21 18:07:45,651 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 342 transitions. Word has length 51 [2021-12-21 18:07:45,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:45,651 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 342 transitions. [2021-12-21 18:07:45,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 8 states have internal predecessors, (39), 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) [2021-12-21 18:07:45,652 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 342 transitions. [2021-12-21 18:07:45,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-21 18:07:45,652 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:45,652 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:45,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-12-21 18:07:45,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-12-21 18:07:46,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-21 18:07:46,068 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [create_dataErr0REQUIRES_VIOLATION, create_dataErr1REQUIRES_VIOLATION, create_dataErr2REQUIRES_VIOLATION, create_dataErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-21 18:07:46,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:46,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1755643937, now seen corresponding path program 1 times [2021-12-21 18:07:46,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:07:46,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980691444] [2021-12-21 18:07:46,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:46,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:07:46,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:07:46,070 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:07:46,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-12-21 18:07:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:46,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 18:07:46,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:07:46,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:07:46,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 18:07:46,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-12-21 18:07:46,740 INFO L353 Elim1Store]: treesize reduction 42, result has 33.3 percent of original size [2021-12-21 18:07:46,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 32 [2021-12-21 18:07:46,796 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 18:07:46,796 INFO L328 TraceCheckSpWp]: Computing backward predicates...