./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 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/uthash-2.0.2/uthash_FNV_test4-2.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 834766c90c3d5af368509ae691087999af545dba19d7eed6a5d75f823cbb2437 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 08:48:27,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 08:48:27,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 08:48:27,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 08:48:27,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 08:48:27,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 08:48:27,208 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 08:48:27,209 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 08:48:27,211 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 08:48:27,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 08:48:27,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 08:48:27,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 08:48:27,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 08:48:27,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 08:48:27,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 08:48:27,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 08:48:27,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 08:48:27,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 08:48:27,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 08:48:27,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 08:48:27,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 08:48:27,234 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 08:48:27,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 08:48:27,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 08:48:27,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 08:48:27,238 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 08:48:27,238 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 08:48:27,239 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 08:48:27,239 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 08:48:27,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 08:48:27,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 08:48:27,241 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 08:48:27,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 08:48:27,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 08:48:27,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 08:48:27,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 08:48:27,244 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 08:48:27,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 08:48:27,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 08:48:27,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 08:48:27,245 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 08:48:27,246 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-16 08:48:27,267 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 08:48:27,267 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 08:48:27,268 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 08:48:27,268 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 08:48:27,269 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 08:48:27,269 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 08:48:27,269 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 08:48:27,269 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 08:48:27,270 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 08:48:27,270 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 08:48:27,270 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 08:48:27,270 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 08:48:27,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 08:48:27,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 08:48:27,271 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 08:48:27,271 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 08:48:27,271 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 08:48:27,271 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 08:48:27,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 08:48:27,272 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 08:48:27,272 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 08:48:27,272 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 08:48:27,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 08:48:27,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 08:48:27,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 08:48:27,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 08:48:27,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 08:48:27,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 08:48:27,274 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 08:48:27,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 08:48:27,274 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 08:48:27,274 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 834766c90c3d5af368509ae691087999af545dba19d7eed6a5d75f823cbb2437 [2021-12-16 08:48:27,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 08:48:27,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 08:48:27,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 08:48:27,478 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 08:48:27,479 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 08:48:27,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-2.i [2021-12-16 08:48:27,526 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc7ad35ba/2fd7502ff056400baa6bb9e123283f44/FLAG214944af2 [2021-12-16 08:48:27,952 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 08:48:27,953 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-2.i [2021-12-16 08:48:27,971 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc7ad35ba/2fd7502ff056400baa6bb9e123283f44/FLAG214944af2 [2021-12-16 08:48:27,983 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc7ad35ba/2fd7502ff056400baa6bb9e123283f44 [2021-12-16 08:48:27,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 08:48:27,987 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 08:48:27,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 08:48:27,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 08:48:27,990 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 08:48:27,991 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 08:48:27" (1/1) ... [2021-12-16 08:48:27,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@364fcee4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:27, skipping insertion in model container [2021-12-16 08:48:27,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 08:48:27" (1/1) ... [2021-12-16 08:48:27,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 08:48:28,043 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 08:48:28,291 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-2.i[33021,33034] [2021-12-16 08:48:28,406 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 08:48:28,416 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) [2021-12-16 08:48:28,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1b9e9807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:28, skipping insertion in model container [2021-12-16 08:48:28,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 08:48:28,419 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-16 08:48:28,421 INFO L158 Benchmark]: Toolchain (without parser) took 433.00ms. Allocated memory is still 111.1MB. Free memory was 78.2MB in the beginning and 74.1MB in the end (delta: 4.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-16 08:48:28,422 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 111.1MB. Free memory is still 66.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 08:48:28,424 INFO L158 Benchmark]: CACSL2BoogieTranslator took 430.76ms. Allocated memory is still 111.1MB. Free memory was 77.9MB in the beginning and 74.1MB in the end (delta: 3.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-16 08:48:28,425 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 111.1MB. Free memory is still 66.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 430.76ms. Allocated memory is still 111.1MB. Free memory was 77.9MB in the beginning and 74.1MB in the end (delta: 3.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 752]: 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/uthash-2.0.2/uthash_FNV_test4-2.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 834766c90c3d5af368509ae691087999af545dba19d7eed6a5d75f823cbb2437 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 08:48:29,842 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 08:48:29,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 08:48:29,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 08:48:29,882 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 08:48:29,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 08:48:29,886 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 08:48:29,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 08:48:29,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 08:48:29,895 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 08:48:29,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 08:48:29,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 08:48:29,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 08:48:29,897 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 08:48:29,898 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 08:48:29,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 08:48:29,901 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 08:48:29,902 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 08:48:29,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 08:48:29,908 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 08:48:29,911 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 08:48:29,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 08:48:29,913 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 08:48:29,914 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 08:48:29,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 08:48:29,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 08:48:29,919 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 08:48:29,920 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 08:48:29,920 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 08:48:29,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 08:48:29,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 08:48:29,921 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 08:48:29,922 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 08:48:29,923 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 08:48:29,923 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 08:48:29,924 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 08:48:29,924 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 08:48:29,924 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 08:48:29,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 08:48:29,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 08:48:29,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 08:48:29,927 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-16 08:48:29,954 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 08:48:29,954 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 08:48:29,955 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 08:48:29,955 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 08:48:29,956 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 08:48:29,956 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 08:48:29,957 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 08:48:29,957 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 08:48:29,957 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 08:48:29,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 08:48:29,958 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 08:48:29,958 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 08:48:29,958 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 08:48:29,958 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 08:48:29,959 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 08:48:29,959 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 08:48:29,959 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 08:48:29,959 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 08:48:29,959 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 08:48:29,959 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 08:48:29,959 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-16 08:48:29,959 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-16 08:48:29,960 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 08:48:29,960 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 08:48:29,960 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 08:48:29,960 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 08:48:29,960 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 08:48:29,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 08:48:29,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 08:48:29,961 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 08:48:29,961 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-16 08:48:29,961 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-16 08:48:29,961 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 08:48:29,961 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-16 08:48:29,961 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 834766c90c3d5af368509ae691087999af545dba19d7eed6a5d75f823cbb2437 [2021-12-16 08:48:30,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 08:48:30,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 08:48:30,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 08:48:30,245 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 08:48:30,245 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 08:48:30,246 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-2.i [2021-12-16 08:48:30,297 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bae7dac2c/e684057dec254ed7846a4568291e649d/FLAG966780b7e [2021-12-16 08:48:30,693 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 08:48:30,697 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-2.i [2021-12-16 08:48:30,714 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bae7dac2c/e684057dec254ed7846a4568291e649d/FLAG966780b7e [2021-12-16 08:48:31,033 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bae7dac2c/e684057dec254ed7846a4568291e649d [2021-12-16 08:48:31,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 08:48:31,037 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 08:48:31,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 08:48:31,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 08:48:31,042 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 08:48:31,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 08:48:31" (1/1) ... [2021-12-16 08:48:31,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@750f425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:31, skipping insertion in model container [2021-12-16 08:48:31,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 08:48:31" (1/1) ... [2021-12-16 08:48:31,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 08:48:31,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 08:48:31,401 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-2.i[33021,33034] [2021-12-16 08:48:31,532 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 08:48:31,540 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-16 08:48:31,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 08:48:31,554 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-2.i[33021,33034] [2021-12-16 08:48:31,622 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 08:48:31,629 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 08:48:31,655 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-2.i[33021,33034] [2021-12-16 08:48:31,707 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 08:48:31,737 INFO L208 MainTranslator]: Completed translation [2021-12-16 08:48:31,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:31 WrapperNode [2021-12-16 08:48:31,737 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 08:48:31,738 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 08:48:31,738 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 08:48:31,739 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 08:48:31,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:31" (1/1) ... [2021-12-16 08:48:31,791 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:31" (1/1) ... [2021-12-16 08:48:31,846 INFO L137 Inliner]: procedures = 180, calls = 400, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1330 [2021-12-16 08:48:31,847 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 08:48:31,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 08:48:31,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 08:48:31,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 08:48:31,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:31" (1/1) ... [2021-12-16 08:48:31,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:31" (1/1) ... [2021-12-16 08:48:31,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:31" (1/1) ... [2021-12-16 08:48:31,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:31" (1/1) ... [2021-12-16 08:48:31,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:31" (1/1) ... [2021-12-16 08:48:31,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:31" (1/1) ... [2021-12-16 08:48:31,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:31" (1/1) ... [2021-12-16 08:48:31,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 08:48:31,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 08:48:31,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 08:48:31,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 08:48:31,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:31" (1/1) ... [2021-12-16 08:48:31,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 08:48:31,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 08:48:31,980 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) [2021-12-16 08:48:32,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 08:48:32,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-16 08:48:32,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-16 08:48:32,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-16 08:48:32,012 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-16 08:48:32,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-16 08:48:32,012 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-16 08:48:32,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 08:48:32,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 08:48:32,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 08:48:32,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 08:48:32,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 08:48:32,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 08:48:32,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-16 08:48:32,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-16 08:48:32,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 08:48:32,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 08:48:32,164 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 08:48:32,165 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 08:48:32,167 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-16 08:48:35,519 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 08:48:35,532 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 08:48:35,533 INFO L301 CfgBuilder]: Removed 69 assume(true) statements. [2021-12-16 08:48:35,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 08:48:35 BoogieIcfgContainer [2021-12-16 08:48:35,536 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 08:48:35,537 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 08:48:35,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 08:48:35,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 08:48:35,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 08:48:31" (1/3) ... [2021-12-16 08:48:35,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10358e98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 08:48:35, skipping insertion in model container [2021-12-16 08:48:35,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:31" (2/3) ... [2021-12-16 08:48:35,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10358e98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 08:48:35, skipping insertion in model container [2021-12-16 08:48:35,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 08:48:35" (3/3) ... [2021-12-16 08:48:35,542 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test4-2.i [2021-12-16 08:48:35,545 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 08:48:35,545 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 753 error locations. [2021-12-16 08:48:35,577 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 08:48:35,583 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 [2021-12-16 08:48:35,583 INFO L340 AbstractCegarLoop]: Starting to check reachability of 753 error locations. [2021-12-16 08:48:35,612 INFO L276 IsEmpty]: Start isEmpty. Operand has 1473 states, 707 states have (on average 2.267326732673267) internal successors, (1603), 1464 states have internal predecessors, (1603), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-16 08:48:35,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-16 08:48:35,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:48:35,616 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-16 08:48:35,616 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-12-16 08:48:35,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:48:35,620 INFO L85 PathProgramCache]: Analyzing trace with hash 37287509, now seen corresponding path program 1 times [2021-12-16 08:48:35,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:48:35,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1019718326] [2021-12-16 08:48:35,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:48:35,629 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:48:35,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:48:35,631 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) [2021-12-16 08:48:35,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-16 08:48:35,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:48:35,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-16 08:48:35,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:48:35,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:48:35,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:48:35,813 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:48:35,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1019718326] [2021-12-16 08:48:35,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1019718326] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:48:35,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:48:35,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 08:48:35,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450908942] [2021-12-16 08:48:35,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:48:35,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 08:48:35,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:48:35,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 08:48:35,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 08:48:35,852 INFO L87 Difference]: Start difference. First operand has 1473 states, 707 states have (on average 2.267326732673267) internal successors, (1603), 1464 states have internal predecessors, (1603), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2021-12-16 08:48:35,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:48:35,928 INFO L93 Difference]: Finished difference Result 1455 states and 1540 transitions. [2021-12-16 08:48:35,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 08:48:35,930 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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 [2021-12-16 08:48:35,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:48:35,948 INFO L225 Difference]: With dead ends: 1455 [2021-12-16 08:48:35,949 INFO L226 Difference]: Without dead ends: 1453 [2021-12-16 08:48:35,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 08:48:35,954 INFO L933 BasicCegarLoop]: 1540 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, 1540 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 [2021-12-16 08:48:35,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1540 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 08:48:35,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2021-12-16 08:48:36,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1453. [2021-12-16 08:48:36,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 698 states have (on average 2.157593123209169) internal successors, (1506), 1444 states have internal predecessors, (1506), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-16 08:48:36,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 1538 transitions. [2021-12-16 08:48:36,023 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 1538 transitions. Word has length 5 [2021-12-16 08:48:36,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:48:36,023 INFO L470 AbstractCegarLoop]: Abstraction has 1453 states and 1538 transitions. [2021-12-16 08:48:36,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2021-12-16 08:48:36,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 1538 transitions. [2021-12-16 08:48:36,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-16 08:48:36,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:48:36,026 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-16 08:48:36,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-16 08:48:36,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:48:36,228 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-12-16 08:48:36,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:48:36,229 INFO L85 PathProgramCache]: Analyzing trace with hash 37287571, now seen corresponding path program 1 times [2021-12-16 08:48:36,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:48:36,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510872020] [2021-12-16 08:48:36,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:48:36,231 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:48:36,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:48:36,240 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) [2021-12-16 08:48:36,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-16 08:48:36,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:48:36,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 08:48:36,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:48:36,464 INFO L388 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 [2021-12-16 08:48:36,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:48:36,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:48:36,502 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:48:36,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510872020] [2021-12-16 08:48:36,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510872020] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:48:36,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:48:36,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 08:48:36,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132421506] [2021-12-16 08:48:36,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:48:36,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:48:36,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:48:36,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:48:36,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:48:36,505 INFO L87 Difference]: Start difference. First operand 1453 states and 1538 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) [2021-12-16 08:48:38,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:48:38,206 INFO L93 Difference]: Finished difference Result 1490 states and 1588 transitions. [2021-12-16 08:48:38,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:48:38,207 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 [2021-12-16 08:48:38,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:48:38,211 INFO L225 Difference]: With dead ends: 1490 [2021-12-16 08:48:38,211 INFO L226 Difference]: Without dead ends: 1490 [2021-12-16 08:48:38,212 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 [2021-12-16 08:48:38,212 INFO L933 BasicCegarLoop]: 810 mSDtfsCounter, 1159 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1175 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-16 08:48:38,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1175 Valid, 1015 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-16 08:48:38,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2021-12-16 08:48:38,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1436. [2021-12-16 08:48:38,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 774 states have (on average 2.0) internal successors, (1548), 1427 states have internal predecessors, (1548), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-16 08:48:38,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 1580 transitions. [2021-12-16 08:48:38,232 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 1580 transitions. Word has length 5 [2021-12-16 08:48:38,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:48:38,233 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 1580 transitions. [2021-12-16 08:48:38,233 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) [2021-12-16 08:48:38,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 1580 transitions. [2021-12-16 08:48:38,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-16 08:48:38,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:48:38,233 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-16 08:48:38,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-16 08:48:38,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:48:38,439 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-12-16 08:48:38,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:48:38,440 INFO L85 PathProgramCache]: Analyzing trace with hash 37287572, now seen corresponding path program 1 times [2021-12-16 08:48:38,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:48:38,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614126296] [2021-12-16 08:48:38,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:48:38,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:48:38,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:48:38,442 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) [2021-12-16 08:48:38,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-16 08:48:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:48:38,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 08:48:38,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:48:38,549 INFO L388 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 [2021-12-16 08:48:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:48:38,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:48:38,570 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:48:38,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614126296] [2021-12-16 08:48:38,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614126296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:48:38,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:48:38,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 08:48:38,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047993196] [2021-12-16 08:48:38,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:48:38,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:48:38,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:48:38,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:48:38,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:48:38,575 INFO L87 Difference]: Start difference. First operand 1436 states and 1580 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) [2021-12-16 08:48:40,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:48:40,795 INFO L93 Difference]: Finished difference Result 1739 states and 1903 transitions. [2021-12-16 08:48:40,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:48:40,795 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 [2021-12-16 08:48:40,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:48:40,799 INFO L225 Difference]: With dead ends: 1739 [2021-12-16 08:48:40,800 INFO L226 Difference]: Without dead ends: 1739 [2021-12-16 08:48:40,800 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 [2021-12-16 08:48:40,801 INFO L933 BasicCegarLoop]: 1206 mSDtfsCounter, 504 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 1796 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-16 08:48:40,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 1796 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-16 08:48:40,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2021-12-16 08:48:40,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1592. [2021-12-16 08:48:40,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 940 states have (on average 1.9723404255319148) internal successors, (1854), 1583 states have internal predecessors, (1854), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-16 08:48:40,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 1886 transitions. [2021-12-16 08:48:40,823 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 1886 transitions. Word has length 5 [2021-12-16 08:48:40,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:48:40,823 INFO L470 AbstractCegarLoop]: Abstraction has 1592 states and 1886 transitions. [2021-12-16 08:48:40,823 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) [2021-12-16 08:48:40,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 1886 transitions. [2021-12-16 08:48:40,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-16 08:48:40,824 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:48:40,824 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-16 08:48:40,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-16 08:48:41,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:48:41,030 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr640REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-12-16 08:48:41,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:48:41,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1157601995, now seen corresponding path program 1 times [2021-12-16 08:48:41,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:48:41,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678311880] [2021-12-16 08:48:41,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:48:41,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:48:41,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:48:41,034 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) [2021-12-16 08:48:41,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-16 08:48:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:48:41,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 08:48:41,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:48:41,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:48:41,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:48:41,135 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:48:41,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678311880] [2021-12-16 08:48:41,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678311880] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:48:41,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:48:41,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:48:41,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70848145] [2021-12-16 08:48:41,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:48:41,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:48:41,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:48:41,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:48:41,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:48:41,137 INFO L87 Difference]: Start difference. First operand 1592 states and 1886 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-12-16 08:48:41,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:48:41,193 INFO L93 Difference]: Finished difference Result 2936 states and 3493 transitions. [2021-12-16 08:48:41,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:48:41,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-12-16 08:48:41,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:48:41,205 INFO L225 Difference]: With dead ends: 2936 [2021-12-16 08:48:41,205 INFO L226 Difference]: Without dead ends: 2936 [2021-12-16 08:48:41,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:48:41,206 INFO L933 BasicCegarLoop]: 1662 mSDtfsCounter, 1143 mSDsluCounter, 1429 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 3091 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 08:48:41,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1149 Valid, 3091 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 08:48:41,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2936 states. [2021-12-16 08:48:41,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2936 to 1593. [2021-12-16 08:48:41,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 941 states have (on average 1.9713071200850159) internal successors, (1855), 1584 states have internal predecessors, (1855), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-16 08:48:41,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 1887 transitions. [2021-12-16 08:48:41,234 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 1887 transitions. Word has length 6 [2021-12-16 08:48:41,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:48:41,235 INFO L470 AbstractCegarLoop]: Abstraction has 1593 states and 1887 transitions. [2021-12-16 08:48:41,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-12-16 08:48:41,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 1887 transitions. [2021-12-16 08:48:41,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 08:48:41,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:48:41,236 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:48:41,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-16 08:48:41,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:48:41,442 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-12-16 08:48:41,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:48:41,443 INFO L85 PathProgramCache]: Analyzing trace with hash 334651453, now seen corresponding path program 1 times [2021-12-16 08:48:41,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:48:41,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2078179524] [2021-12-16 08:48:41,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:48:41,444 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:48:41,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:48:41,447 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) [2021-12-16 08:48:41,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-16 08:48:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:48:41,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 08:48:41,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:48:41,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:48:41,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:48:41,592 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:48:41,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2078179524] [2021-12-16 08:48:41,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2078179524] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:48:41,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:48:41,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:48:41,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692158514] [2021-12-16 08:48:41,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:48:41,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:48:41,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:48:41,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:48:41,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:48:41,594 INFO L87 Difference]: Start difference. First operand 1593 states and 1887 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-12-16 08:48:41,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:48:41,619 INFO L93 Difference]: Finished difference Result 1557 states and 1850 transitions. [2021-12-16 08:48:41,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:48:41,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2021-12-16 08:48:41,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:48:41,623 INFO L225 Difference]: With dead ends: 1557 [2021-12-16 08:48:41,624 INFO L226 Difference]: Without dead ends: 1557 [2021-12-16 08:48:41,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:48:41,624 INFO L933 BasicCegarLoop]: 1387 mSDtfsCounter, 1347 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1363 SdHoareTripleChecker+Valid, 1420 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 08:48:41,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1363 Valid, 1420 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 08:48:41,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1557 states. [2021-12-16 08:48:41,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1557 to 1551. [2021-12-16 08:48:41,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 923 states have (on average 1.9631635969664138) internal successors, (1812), 1542 states have internal predecessors, (1812), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-16 08:48:41,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 1844 transitions. [2021-12-16 08:48:41,645 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 1844 transitions. Word has length 11 [2021-12-16 08:48:41,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:48:41,645 INFO L470 AbstractCegarLoop]: Abstraction has 1551 states and 1844 transitions. [2021-12-16 08:48:41,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-12-16 08:48:41,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 1844 transitions. [2021-12-16 08:48:41,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 08:48:41,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:48:41,646 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:48:41,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-16 08:48:41,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:48:41,853 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-12-16 08:48:41,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:48:41,853 INFO L85 PathProgramCache]: Analyzing trace with hash -522505033, now seen corresponding path program 1 times [2021-12-16 08:48:41,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:48:41,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1450980374] [2021-12-16 08:48:41,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:48:41,854 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:48:41,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:48:41,855 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) [2021-12-16 08:48:41,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-16 08:48:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:48:41,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 08:48:41,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:48:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:48:42,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:48:42,009 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:48:42,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1450980374] [2021-12-16 08:48:42,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1450980374] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:48:42,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:48:42,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 08:48:42,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394338758] [2021-12-16 08:48:42,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:48:42,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:48:42,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:48:42,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:48:42,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:48:42,010 INFO L87 Difference]: Start difference. First operand 1551 states and 1844 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-12-16 08:48:42,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:48:42,071 INFO L93 Difference]: Finished difference Result 1536 states and 1822 transitions. [2021-12-16 08:48:42,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:48:42,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 13 [2021-12-16 08:48:42,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:48:42,076 INFO L225 Difference]: With dead ends: 1536 [2021-12-16 08:48:42,076 INFO L226 Difference]: Without dead ends: 1536 [2021-12-16 08:48:42,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 08:48:42,077 INFO L933 BasicCegarLoop]: 1342 mSDtfsCounter, 1318 mSDsluCounter, 1368 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1334 SdHoareTripleChecker+Valid, 2710 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 08:48:42,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1334 Valid, 2710 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 08:48:42,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-12-16 08:48:42,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1529. [2021-12-16 08:48:42,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 915 states have (on average 1.9486338797814207) internal successors, (1783), 1520 states have internal predecessors, (1783), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-16 08:48:42,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 1815 transitions. [2021-12-16 08:48:42,103 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 1815 transitions. Word has length 13 [2021-12-16 08:48:42,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:48:42,103 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 1815 transitions. [2021-12-16 08:48:42,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-12-16 08:48:42,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 1815 transitions. [2021-12-16 08:48:42,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 08:48:42,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:48:42,105 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:48:42,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-16 08:48:42,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:48:42,313 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-12-16 08:48:42,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:48:42,313 INFO L85 PathProgramCache]: Analyzing trace with hash -22216187, now seen corresponding path program 1 times [2021-12-16 08:48:42,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:48:42,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [41607934] [2021-12-16 08:48:42,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:48:42,314 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:48:42,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:48:42,315 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) [2021-12-16 08:48:42,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-16 08:48:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:48:42,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 08:48:42,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:48:42,455 INFO L388 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 [2021-12-16 08:48:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:48:42,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:48:42,518 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:48:42,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [41607934] [2021-12-16 08:48:42,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [41607934] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:48:42,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:48:42,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:48:42,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398449689] [2021-12-16 08:48:42,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:48:42,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:48:42,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:48:42,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:48:42,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:48:42,520 INFO L87 Difference]: Start difference. First operand 1529 states and 1815 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 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) [2021-12-16 08:48:44,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:48:44,958 INFO L93 Difference]: Finished difference Result 2173 states and 2457 transitions. [2021-12-16 08:48:44,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 08:48:44,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 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 27 [2021-12-16 08:48:44,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:48:44,966 INFO L225 Difference]: With dead ends: 2173 [2021-12-16 08:48:44,967 INFO L226 Difference]: Without dead ends: 2173 [2021-12-16 08:48:44,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 08:48:44,968 INFO L933 BasicCegarLoop]: 687 mSDtfsCounter, 2585 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 1395 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2598 SdHoareTripleChecker+Valid, 1340 SdHoareTripleChecker+Invalid, 1456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-16 08:48:44,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2598 Valid, 1340 Invalid, 1456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1395 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-16 08:48:44,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2173 states. [2021-12-16 08:48:44,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2173 to 1525. [2021-12-16 08:48:44,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 915 states have (on average 1.9442622950819672) internal successors, (1779), 1516 states have internal predecessors, (1779), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-16 08:48:44,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 1811 transitions. [2021-12-16 08:48:44,987 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 1811 transitions. Word has length 27 [2021-12-16 08:48:44,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:48:44,987 INFO L470 AbstractCegarLoop]: Abstraction has 1525 states and 1811 transitions. [2021-12-16 08:48:44,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 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) [2021-12-16 08:48:44,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 1811 transitions. [2021-12-16 08:48:44,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 08:48:44,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:48:44,988 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:48:44,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-16 08:48:45,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:48:45,195 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-12-16 08:48:45,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:48:45,196 INFO L85 PathProgramCache]: Analyzing trace with hash -22216186, now seen corresponding path program 1 times [2021-12-16 08:48:45,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:48:45,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1770081017] [2021-12-16 08:48:45,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:48:45,196 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:48:45,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:48:45,197 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) [2021-12-16 08:48:45,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-16 08:48:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:48:45,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 08:48:45,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:48:45,333 INFO L388 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 [2021-12-16 08:48:45,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:48:45,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:48:45,461 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:48:45,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1770081017] [2021-12-16 08:48:45,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1770081017] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:48:45,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:48:45,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:48:45,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796133885] [2021-12-16 08:48:45,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:48:45,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:48:45,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:48:45,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:48:45,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:48:45,463 INFO L87 Difference]: Start difference. First operand 1525 states and 1811 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 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) [2021-12-16 08:48:48,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:48:48,395 INFO L93 Difference]: Finished difference Result 1908 states and 2095 transitions. [2021-12-16 08:48:48,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 08:48:48,395 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 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 27 [2021-12-16 08:48:48,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:48:48,400 INFO L225 Difference]: With dead ends: 1908 [2021-12-16 08:48:48,400 INFO L226 Difference]: Without dead ends: 1908 [2021-12-16 08:48:48,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 08:48:48,400 INFO L933 BasicCegarLoop]: 1070 mSDtfsCounter, 1061 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 1642 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 2254 SdHoareTripleChecker+Invalid, 1646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-16 08:48:48,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1071 Valid, 2254 Invalid, 1646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1642 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-16 08:48:48,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2021-12-16 08:48:48,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1521. [2021-12-16 08:48:48,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 915 states have (on average 1.9398907103825136) internal successors, (1775), 1512 states have internal predecessors, (1775), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-16 08:48:48,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 1807 transitions. [2021-12-16 08:48:48,418 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 1807 transitions. Word has length 27 [2021-12-16 08:48:48,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:48:48,419 INFO L470 AbstractCegarLoop]: Abstraction has 1521 states and 1807 transitions. [2021-12-16 08:48:48,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 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) [2021-12-16 08:48:48,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 1807 transitions. [2021-12-16 08:48:48,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-16 08:48:48,420 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:48:48,420 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:48:48,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-16 08:48:48,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:48:48,624 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr108REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-12-16 08:48:48,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:48:48,625 INFO L85 PathProgramCache]: Analyzing trace with hash 810363537, now seen corresponding path program 1 times [2021-12-16 08:48:48,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:48:48,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221759142] [2021-12-16 08:48:48,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:48:48,625 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:48:48,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:48:48,626 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) [2021-12-16 08:48:48,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-16 08:48:48,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:48:48,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 08:48:48,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:48:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:48:48,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:48:48,860 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:48:48,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221759142] [2021-12-16 08:48:48,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221759142] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:48:48,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:48:48,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 08:48:48,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188083773] [2021-12-16 08:48:48,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:48:48,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:48:48,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:48:48,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:48:48,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:48:48,862 INFO L87 Difference]: Start difference. First operand 1521 states and 1807 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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) [2021-12-16 08:48:48,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:48:48,896 INFO L93 Difference]: Finished difference Result 1521 states and 1803 transitions. [2021-12-16 08:48:48,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:48:48,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 42 [2021-12-16 08:48:48,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:48:48,900 INFO L225 Difference]: With dead ends: 1521 [2021-12-16 08:48:48,900 INFO L226 Difference]: Without dead ends: 1521 [2021-12-16 08:48:48,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 08:48:48,901 INFO L933 BasicCegarLoop]: 1336 mSDtfsCounter, 1294 mSDsluCounter, 1352 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1310 SdHoareTripleChecker+Valid, 2688 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 08:48:48,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1310 Valid, 2688 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 08:48:48,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2021-12-16 08:48:48,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 1515. [2021-12-16 08:48:48,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 909 states have (on average 1.9416941694169416) internal successors, (1765), 1506 states have internal predecessors, (1765), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-16 08:48:48,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 1797 transitions. [2021-12-16 08:48:48,916 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 1797 transitions. Word has length 42 [2021-12-16 08:48:48,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:48:48,917 INFO L470 AbstractCegarLoop]: Abstraction has 1515 states and 1797 transitions. [2021-12-16 08:48:48,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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) [2021-12-16 08:48:48,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 1797 transitions. [2021-12-16 08:48:48,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-16 08:48:48,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:48:48,918 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:48:48,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-16 08:48:49,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:48:49,127 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr108REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-12-16 08:48:49,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:48:49,127 INFO L85 PathProgramCache]: Analyzing trace with hash 2087041861, now seen corresponding path program 1 times [2021-12-16 08:48:49,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:48:49,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955291348] [2021-12-16 08:48:49,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:48:49,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:48:49,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:48:49,131 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) [2021-12-16 08:48:49,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-16 08:48:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:48:49,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 08:48:49,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:48:49,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:48:49,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:48:49,512 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:48:49,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955291348] [2021-12-16 08:48:49,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955291348] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:48:49,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:48:49,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:48:49,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431363917] [2021-12-16 08:48:49,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:48:49,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:48:49,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:48:49,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:48:49,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:48:49,514 INFO L87 Difference]: Start difference. First operand 1515 states and 1797 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2021-12-16 08:48:49,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:48:49,653 INFO L93 Difference]: Finished difference Result 1756 states and 2047 transitions. [2021-12-16 08:48:49,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:48:49,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 50 [2021-12-16 08:48:49,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:48:49,658 INFO L225 Difference]: With dead ends: 1756 [2021-12-16 08:48:49,658 INFO L226 Difference]: Without dead ends: 1756 [2021-12-16 08:48:49,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:48:49,658 INFO L933 BasicCegarLoop]: 1415 mSDtfsCounter, 269 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 2626 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 08:48:49,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 2626 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 08:48:49,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-12-16 08:48:49,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1561. [2021-12-16 08:48:49,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 955 states have (on average 1.8963350785340314) internal successors, (1811), 1552 states have internal predecessors, (1811), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-16 08:48:49,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 1843 transitions. [2021-12-16 08:48:49,676 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 1843 transitions. Word has length 50 [2021-12-16 08:48:49,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:48:49,676 INFO L470 AbstractCegarLoop]: Abstraction has 1561 states and 1843 transitions. [2021-12-16 08:48:49,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2021-12-16 08:48:49,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 1843 transitions. [2021-12-16 08:48:49,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-16 08:48:49,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:48:49,680 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:48:49,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-16 08:48:49,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:48:49,888 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-12-16 08:48:49,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:48:49,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1009990608, now seen corresponding path program 1 times [2021-12-16 08:48:49,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:48:49,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1023146301] [2021-12-16 08:48:49,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:48:49,889 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:48:49,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:48:49,890 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) [2021-12-16 08:48:49,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-16 08:48:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:48:50,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 08:48:50,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:48:50,177 INFO L388 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 [2021-12-16 08:48:50,182 INFO L388 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 [2021-12-16 08:48:50,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 08:48:50,510 INFO L388 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 [2021-12-16 08:48:50,518 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 08:48:50,518 INFO L388 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 14 treesize of output 14 [2021-12-16 08:48:50,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:48:50,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:48:50,530 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:48:50,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1023146301] [2021-12-16 08:48:50,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1023146301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:48:50,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:48:50,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:48:50,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290119265] [2021-12-16 08:48:50,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:48:50,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:48:50,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:48:50,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:48:50,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:48:50,532 INFO L87 Difference]: Start difference. First operand 1561 states and 1843 transitions. Second operand has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-12-16 08:48:52,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:48:52,323 INFO L93 Difference]: Finished difference Result 1530 states and 1766 transitions. [2021-12-16 08:48:52,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:48:52,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 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 53 [2021-12-16 08:48:52,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:48:52,327 INFO L225 Difference]: With dead ends: 1530 [2021-12-16 08:48:52,327 INFO L226 Difference]: Without dead ends: 1530 [2021-12-16 08:48:52,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:48:52,327 INFO L933 BasicCegarLoop]: 562 mSDtfsCounter, 2001 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2007 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-16 08:48:52,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2007 Valid, 790 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-16 08:48:52,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2021-12-16 08:48:52,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1311. [2021-12-16 08:48:52,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 789 states have (on average 1.7870722433460076) internal successors, (1410), 1302 states have internal predecessors, (1410), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-16 08:48:52,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 1442 transitions. [2021-12-16 08:48:52,341 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 1442 transitions. Word has length 53 [2021-12-16 08:48:52,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:48:52,341 INFO L470 AbstractCegarLoop]: Abstraction has 1311 states and 1442 transitions. [2021-12-16 08:48:52,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-12-16 08:48:52,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 1442 transitions. [2021-12-16 08:48:52,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-16 08:48:52,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:48:52,344 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:48:52,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-16 08:48:52,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:48:52,553 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr66REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-12-16 08:48:52,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:48:52,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1993678057, now seen corresponding path program 1 times [2021-12-16 08:48:52,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:48:52,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714133880] [2021-12-16 08:48:52,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:48:52,555 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:48:52,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:48:52,555 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) [2021-12-16 08:48:52,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-16 08:48:52,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:48:52,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 08:48:52,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:48:52,804 INFO L388 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 [2021-12-16 08:48:52,818 INFO L388 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 [2021-12-16 08:48:52,836 INFO L388 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 [2021-12-16 08:48:52,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:48:52,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:48:52,846 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:48:52,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714133880] [2021-12-16 08:48:52,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714133880] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:48:52,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:48:52,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 08:48:52,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253458198] [2021-12-16 08:48:52,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:48:52,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 08:48:52,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:48:52,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 08:48:52,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 08:48:52,849 INFO L87 Difference]: Start difference. First operand 1311 states and 1442 transitions. Second operand has 5 states, 4 states have (on average 14.5) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-16 08:48:54,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:48:54,851 INFO L93 Difference]: Finished difference Result 1310 states and 1441 transitions. [2021-12-16 08:48:54,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 08:48:54,852 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.5) internal successors, (58), 5 states have internal predecessors, (58), 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 58 [2021-12-16 08:48:54,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:48:54,855 INFO L225 Difference]: With dead ends: 1310 [2021-12-16 08:48:54,855 INFO L226 Difference]: Without dead ends: 1310 [2021-12-16 08:48:54,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-16 08:48:54,855 INFO L933 BasicCegarLoop]: 1256 mSDtfsCounter, 4 mSDsluCounter, 1918 mSDsCounter, 0 mSdLazyCounter, 1855 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3174 SdHoareTripleChecker+Invalid, 1856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-16 08:48:54,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 3174 Invalid, 1856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1855 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-16 08:48:54,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-12-16 08:48:54,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1310. [2021-12-16 08:48:54,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 789 states have (on average 1.785804816223067) internal successors, (1409), 1301 states have internal predecessors, (1409), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-16 08:48:54,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1441 transitions. [2021-12-16 08:48:54,866 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1441 transitions. Word has length 58 [2021-12-16 08:48:54,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:48:54,867 INFO L470 AbstractCegarLoop]: Abstraction has 1310 states and 1441 transitions. [2021-12-16 08:48:54,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.5) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-16 08:48:54,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1441 transitions. [2021-12-16 08:48:54,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-16 08:48:54,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:48:54,868 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:48:54,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-16 08:48:55,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:48:55,077 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr67REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-12-16 08:48:55,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:48:55,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1993678056, now seen corresponding path program 1 times [2021-12-16 08:48:55,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:48:55,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655158202] [2021-12-16 08:48:55,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:48:55,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:48:55,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:48:55,079 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) [2021-12-16 08:48:55,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-16 08:48:55,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:48:55,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 08:48:55,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:48:55,341 INFO L388 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 [2021-12-16 08:48:55,358 INFO L388 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 [2021-12-16 08:48:55,364 INFO L388 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 [2021-12-16 08:48:55,399 INFO L388 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 [2021-12-16 08:48:55,403 INFO L388 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 [2021-12-16 08:48:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:48:55,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:48:55,414 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:48:55,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [655158202] [2021-12-16 08:48:55,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [655158202] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:48:55,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:48:55,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 08:48:55,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520849655] [2021-12-16 08:48:55,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:48:55,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 08:48:55,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:48:55,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 08:48:55,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 08:48:55,416 INFO L87 Difference]: Start difference. First operand 1310 states and 1441 transitions. Second operand has 5 states, 4 states have (on average 14.5) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-16 08:48:58,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:48:58,067 INFO L93 Difference]: Finished difference Result 1309 states and 1440 transitions. [2021-12-16 08:48:58,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 08:48:58,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.5) internal successors, (58), 5 states have internal predecessors, (58), 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 58 [2021-12-16 08:48:58,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:48:58,070 INFO L225 Difference]: With dead ends: 1309 [2021-12-16 08:48:58,070 INFO L226 Difference]: Without dead ends: 1309 [2021-12-16 08:48:58,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-16 08:48:58,071 INFO L933 BasicCegarLoop]: 1256 mSDtfsCounter, 2 mSDsluCounter, 1957 mSDsCounter, 0 mSdLazyCounter, 1814 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3213 SdHoareTripleChecker+Invalid, 1815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-16 08:48:58,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3213 Invalid, 1815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1814 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-16 08:48:58,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2021-12-16 08:48:58,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 1309. [2021-12-16 08:48:58,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 788 states have (on average 1.7868020304568528) internal successors, (1408), 1300 states have internal predecessors, (1408), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-16 08:48:58,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 1440 transitions. [2021-12-16 08:48:58,092 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 1440 transitions. Word has length 58 [2021-12-16 08:48:58,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:48:58,093 INFO L470 AbstractCegarLoop]: Abstraction has 1309 states and 1440 transitions. [2021-12-16 08:48:58,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.5) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-16 08:48:58,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 1440 transitions. [2021-12-16 08:48:58,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-16 08:48:58,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:48:58,093 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:48:58,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-16 08:48:58,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:48:58,303 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-12-16 08:48:58,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:48:58,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1427434238, now seen corresponding path program 1 times [2021-12-16 08:48:58,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:48:58,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134431710] [2021-12-16 08:48:58,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:48:58,304 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:48:58,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:48:58,305 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) [2021-12-16 08:48:58,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-16 08:48:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:48:58,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 08:48:58,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:48:58,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:48:58,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:48:58,612 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:48:58,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134431710] [2021-12-16 08:48:58,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134431710] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:48:58,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:48:58,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 08:48:58,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985319115] [2021-12-16 08:48:58,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:48:58,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:48:58,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:48:58,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:48:58,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:48:58,614 INFO L87 Difference]: Start difference. First operand 1309 states and 1440 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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) [2021-12-16 08:48:58,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:48:58,656 INFO L93 Difference]: Finished difference Result 1312 states and 1445 transitions. [2021-12-16 08:48:58,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:48:58,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 66 [2021-12-16 08:48:58,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:48:58,661 INFO L225 Difference]: With dead ends: 1312 [2021-12-16 08:48:58,661 INFO L226 Difference]: Without dead ends: 1312 [2021-12-16 08:48:58,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 08:48:58,662 INFO L933 BasicCegarLoop]: 1255 mSDtfsCounter, 2 mSDsluCounter, 2502 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3757 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 08:48:58,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3757 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 08:48:58,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2021-12-16 08:48:58,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 1312. [2021-12-16 08:48:58,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 790 states have (on average 1.7860759493670886) internal successors, (1411), 1303 states have internal predecessors, (1411), 16 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (18), 7 states have call predecessors, (18), 16 states have call successors, (18) [2021-12-16 08:48:58,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1445 transitions. [2021-12-16 08:48:58,676 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1445 transitions. Word has length 66 [2021-12-16 08:48:58,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:48:58,676 INFO L470 AbstractCegarLoop]: Abstraction has 1312 states and 1445 transitions. [2021-12-16 08:48:58,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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) [2021-12-16 08:48:58,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1445 transitions. [2021-12-16 08:48:58,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-16 08:48:58,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:48:58,677 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:48:58,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-16 08:48:58,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:48:58,889 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-12-16 08:48:58,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:48:58,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1840539799, now seen corresponding path program 1 times [2021-12-16 08:48:58,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:48:58,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [925062683] [2021-12-16 08:48:58,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:48:58,891 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:48:58,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:48:58,892 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) [2021-12-16 08:48:58,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-16 08:48:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:48:59,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 08:48:59,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:48:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:48:59,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 08:48:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:48:59,298 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:48:59,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [925062683] [2021-12-16 08:48:59,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [925062683] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 08:48:59,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 08:48:59,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-16 08:48:59,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474686880] [2021-12-16 08:48:59,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 08:48:59,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 08:48:59,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:48:59,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 08:48:59,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-16 08:48:59,300 INFO L87 Difference]: Start difference. First operand 1312 states and 1445 transitions. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:48:59,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:48:59,447 INFO L93 Difference]: Finished difference Result 1324 states and 1463 transitions. [2021-12-16 08:48:59,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 08:48:59,448 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 67 [2021-12-16 08:48:59,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:48:59,451 INFO L225 Difference]: With dead ends: 1324 [2021-12-16 08:48:59,451 INFO L226 Difference]: Without dead ends: 1324 [2021-12-16 08:48:59,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-12-16 08:48:59,452 INFO L933 BasicCegarLoop]: 1255 mSDtfsCounter, 12 mSDsluCounter, 7487 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 8742 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 08:48:59,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 8742 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 08:48:59,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-12-16 08:48:59,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1322. [2021-12-16 08:48:59,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 799 states have (on average 1.7847309136420526) internal successors, (1426), 1312 states have internal predecessors, (1426), 16 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (18), 7 states have call predecessors, (18), 16 states have call successors, (18) [2021-12-16 08:48:59,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 1460 transitions. [2021-12-16 08:48:59,465 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 1460 transitions. Word has length 67 [2021-12-16 08:48:59,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:48:59,465 INFO L470 AbstractCegarLoop]: Abstraction has 1322 states and 1460 transitions. [2021-12-16 08:48:59,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:48:59,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 1460 transitions. [2021-12-16 08:48:59,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-16 08:48:59,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:48:59,466 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:48:59,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-16 08:48:59,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:48:59,675 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-12-16 08:48:59,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:48:59,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1070860606, now seen corresponding path program 2 times [2021-12-16 08:48:59,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:48:59,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225720403] [2021-12-16 08:48:59,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 08:48:59,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:48:59,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:48:59,677 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) [2021-12-16 08:48:59,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-16 08:48:59,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 08:48:59,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 08:48:59,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 08:48:59,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:49:00,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:49:00,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 08:49:00,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:49:00,298 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:49:00,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225720403] [2021-12-16 08:49:00,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [225720403] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 08:49:00,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 08:49:00,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-16 08:49:00,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529522798] [2021-12-16 08:49:00,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 08:49:00,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 08:49:00,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:49:00,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 08:49:00,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-12-16 08:49:00,299 INFO L87 Difference]: Start difference. First operand 1322 states and 1460 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:49:00,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:49:00,776 INFO L93 Difference]: Finished difference Result 1343 states and 1492 transitions. [2021-12-16 08:49:00,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-16 08:49:00,777 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 70 [2021-12-16 08:49:00,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:49:00,779 INFO L225 Difference]: With dead ends: 1343 [2021-12-16 08:49:00,780 INFO L226 Difference]: Without dead ends: 1339 [2021-12-16 08:49:00,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-12-16 08:49:00,780 INFO L933 BasicCegarLoop]: 1258 mSDtfsCounter, 51 mSDsluCounter, 6268 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 7526 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 08:49:00,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 7526 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 08:49:00,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2021-12-16 08:49:00,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 1331. [2021-12-16 08:49:00,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 808 states have (on average 1.7797029702970297) internal successors, (1438), 1321 states have internal predecessors, (1438), 16 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (18), 7 states have call predecessors, (18), 16 states have call successors, (18) [2021-12-16 08:49:00,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 1472 transitions. [2021-12-16 08:49:00,804 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 1472 transitions. Word has length 70 [2021-12-16 08:49:00,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:49:00,804 INFO L470 AbstractCegarLoop]: Abstraction has 1331 states and 1472 transitions. [2021-12-16 08:49:00,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:49:00,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 1472 transitions. [2021-12-16 08:49:00,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-16 08:49:00,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:49:00,808 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:49:00,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-16 08:49:01,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:49:01,015 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-12-16 08:49:01,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:49:01,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1953798814, now seen corresponding path program 3 times [2021-12-16 08:49:01,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:49:01,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786781364] [2021-12-16 08:49:01,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 08:49:01,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:49:01,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:49:01,017 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) [2021-12-16 08:49:01,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-16 08:49:01,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-16 08:49:01,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 08:49:01,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 08:49:01,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:49:01,729 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:49:01,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 08:49:02,314 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:49:02,314 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:49:02,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786781364] [2021-12-16 08:49:02,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [786781364] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 08:49:02,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 08:49:02,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-12-16 08:49:02,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806360122] [2021-12-16 08:49:02,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 08:49:02,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-16 08:49:02,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:49:02,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-16 08:49:02,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-12-16 08:49:02,316 INFO L87 Difference]: Start difference. First operand 1331 states and 1472 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:49:04,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:49:04,880 INFO L93 Difference]: Finished difference Result 1373 states and 1548 transitions. [2021-12-16 08:49:04,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-16 08:49:04,880 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 76 [2021-12-16 08:49:04,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:49:04,883 INFO L225 Difference]: With dead ends: 1373 [2021-12-16 08:49:04,883 INFO L226 Difference]: Without dead ends: 1367 [2021-12-16 08:49:04,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=793, Invalid=1559, Unknown=0, NotChecked=0, Total=2352 [2021-12-16 08:49:04,884 INFO L933 BasicCegarLoop]: 1262 mSDtfsCounter, 189 mSDsluCounter, 13826 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 15088 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-16 08:49:04,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 15088 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-16 08:49:04,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2021-12-16 08:49:04,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1349. [2021-12-16 08:49:04,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 826 states have (on average 1.7687651331719128) internal successors, (1461), 1339 states have internal predecessors, (1461), 16 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (18), 7 states have call predecessors, (18), 16 states have call successors, (18) [2021-12-16 08:49:04,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 1495 transitions. [2021-12-16 08:49:04,896 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 1495 transitions. Word has length 76 [2021-12-16 08:49:04,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:49:04,896 INFO L470 AbstractCegarLoop]: Abstraction has 1349 states and 1495 transitions. [2021-12-16 08:49:04,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:49:04,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 1495 transitions. [2021-12-16 08:49:04,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-16 08:49:04,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:49:04,897 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:49:04,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-16 08:49:05,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:49:05,107 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-12-16 08:49:05,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:49:05,108 INFO L85 PathProgramCache]: Analyzing trace with hash -613669538, now seen corresponding path program 4 times [2021-12-16 08:49:05,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:49:05,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891198629] [2021-12-16 08:49:05,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 08:49:05,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:49:05,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:49:05,109 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) [2021-12-16 08:49:05,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-16 08:49:05,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 08:49:05,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 08:49:05,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-16 08:49:05,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:49:05,735 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:49:05,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 08:49:07,037 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:49:07,037 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:49:07,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891198629] [2021-12-16 08:49:07,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891198629] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 08:49:07,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 08:49:07,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-16 08:49:07,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773077997] [2021-12-16 08:49:07,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 08:49:07,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-16 08:49:07,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:49:07,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-16 08:49:07,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=1778, Unknown=0, NotChecked=0, Total=2450 [2021-12-16 08:49:07,049 INFO L87 Difference]: Start difference. First operand 1349 states and 1495 transitions. Second operand has 50 states, 50 states have (on average 2.22) internal successors, (111), 50 states have internal predecessors, (111), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:49:16,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:49:16,867 INFO L93 Difference]: Finished difference Result 1429 states and 1628 transitions. [2021-12-16 08:49:16,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-12-16 08:49:16,867 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.22) internal successors, (111), 50 states have internal predecessors, (111), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 88 [2021-12-16 08:49:16,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:49:16,870 INFO L225 Difference]: With dead ends: 1429 [2021-12-16 08:49:16,870 INFO L226 Difference]: Without dead ends: 1425 [2021-12-16 08:49:16,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=3791, Invalid=9319, Unknown=0, NotChecked=0, Total=13110 [2021-12-16 08:49:16,873 INFO L933 BasicCegarLoop]: 1275 mSDtfsCounter, 507 mSDsluCounter, 29214 mSDsCounter, 0 mSdLazyCounter, 2979 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 30489 SdHoareTripleChecker+Invalid, 3425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 2979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-16 08:49:16,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [507 Valid, 30489 Invalid, 3425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 2979 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-16 08:49:16,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-12-16 08:49:16,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1383. [2021-12-16 08:49:16,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 860 states have (on average 1.7523255813953489) internal successors, (1507), 1373 states have internal predecessors, (1507), 16 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (18), 7 states have call predecessors, (18), 16 states have call successors, (18) [2021-12-16 08:49:16,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 1541 transitions. [2021-12-16 08:49:16,906 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 1541 transitions. Word has length 88 [2021-12-16 08:49:16,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:49:16,907 INFO L470 AbstractCegarLoop]: Abstraction has 1383 states and 1541 transitions. [2021-12-16 08:49:16,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.22) internal successors, (111), 50 states have internal predecessors, (111), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:49:16,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 1541 transitions. [2021-12-16 08:49:16,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-16 08:49:16,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:49:16,908 INFO L514 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:49:16,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-16 08:49:17,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:49:17,119 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-12-16 08:49:17,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:49:17,119 INFO L85 PathProgramCache]: Analyzing trace with hash 97867710, now seen corresponding path program 5 times [2021-12-16 08:49:17,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:49:17,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [293515724] [2021-12-16 08:49:17,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 08:49:17,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:49:17,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:49:17,120 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:49:17,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-16 08:49:18,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-12-16 08:49:18,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 08:49:18,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-16 08:49:18,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:49:18,341 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-16 08:49:18,342 INFO L388 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 21 [2021-12-16 08:49:18,667 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-12-16 08:49:18,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 47 [2021-12-16 08:49:18,714 INFO L388 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 [2021-12-16 08:49:18,854 INFO L388 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 45 treesize of output 27 [2021-12-16 08:49:23,909 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 08:49:23,910 INFO L388 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 57 treesize of output 56 [2021-12-16 08:49:23,957 INFO L388 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 30 [2021-12-16 08:49:23,996 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2021-12-16 08:49:23,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 08:49:24,218 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1651 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem33#1.base| v_ArrVal_1651) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd |c_ULTIMATE.start_main_~user~0#1.offset| (_ bv8 32)))) (_ bv1 1)))) is different from false [2021-12-16 08:49:24,220 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:49:24,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [293515724] [2021-12-16 08:49:24,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [293515724] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 08:49:24,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [163588337] [2021-12-16 08:49:24,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 08:49:24,220 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-16 08:49:24,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-16 08:49:24,221 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-16 08:49:24,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process