./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 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_test10-3.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 c098eb2ea0abe7b0f4b25f613d67df9ef36b2215e5396f258b75924d2167f9c8 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 19:13:16,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 19:13:16,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 19:13:16,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 19:13:16,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 19:13:16,130 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 19:13:16,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 19:13:16,134 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 19:13:16,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 19:13:16,141 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 19:13:16,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 19:13:16,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 19:13:16,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 19:13:16,145 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 19:13:16,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 19:13:16,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 19:13:16,150 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 19:13:16,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 19:13:16,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 19:13:16,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 19:13:16,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 19:13:16,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 19:13:16,163 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 19:13:16,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 19:13:16,166 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 19:13:16,166 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 19:13:16,167 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 19:13:16,168 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 19:13:16,169 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 19:13:16,169 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 19:13:16,170 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 19:13:16,170 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 19:13:16,172 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 19:13:16,173 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 19:13:16,174 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 19:13:16,174 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 19:13:16,175 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 19:13:16,175 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 19:13:16,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 19:13:16,176 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 19:13:16,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 19:13:16,177 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-22 19:13:16,208 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 19:13:16,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 19:13:16,209 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 19:13:16,209 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 19:13:16,210 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 19:13:16,211 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 19:13:16,211 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 19:13:16,211 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 19:13:16,212 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 19:13:16,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 19:13:16,213 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 19:13:16,213 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 19:13:16,213 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 19:13:16,213 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 19:13:16,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 19:13:16,214 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 19:13:16,214 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 19:13:16,214 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 19:13:16,214 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 19:13:16,214 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 19:13:16,215 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 19:13:16,215 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 19:13:16,215 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 19:13:16,215 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 19:13:16,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 19:13:16,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 19:13:16,216 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 19:13:16,217 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 19:13:16,217 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 19:13:16,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 19:13:16,218 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 19:13:16,218 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c098eb2ea0abe7b0f4b25f613d67df9ef36b2215e5396f258b75924d2167f9c8 [2021-12-22 19:13:16,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 19:13:16,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 19:13:16,452 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 19:13:16,453 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 19:13:16,454 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 19:13:16,455 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-3.i [2021-12-22 19:13:16,529 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d885a3e86/2e1ba56256ac4098a2ee92efb0d527ed/FLAGa7e69d968 [2021-12-22 19:13:17,046 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 19:13:17,047 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-3.i [2021-12-22 19:13:17,073 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d885a3e86/2e1ba56256ac4098a2ee92efb0d527ed/FLAGa7e69d968 [2021-12-22 19:13:17,308 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d885a3e86/2e1ba56256ac4098a2ee92efb0d527ed [2021-12-22 19:13:17,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 19:13:17,311 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 19:13:17,313 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 19:13:17,313 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 19:13:17,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 19:13:17,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:13:17" (1/1) ... [2021-12-22 19:13:17,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a0b36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:13:17, skipping insertion in model container [2021-12-22 19:13:17,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:13:17" (1/1) ... [2021-12-22 19:13:17,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 19:13:17,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 19:13:17,750 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_test10-3.i[33022,33035] [2021-12-22 19:13:17,931 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:13:17,939 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) [2021-12-22 19:13:17,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@b331537 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:13:17, skipping insertion in model container [2021-12-22 19:13:17,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 19:13:17,940 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-22 19:13:17,942 INFO L158 Benchmark]: Toolchain (without parser) took 629.88ms. Allocated memory is still 88.1MB. Free memory was 54.3MB in the beginning and 45.1MB in the end (delta: 9.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-22 19:13:17,943 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 88.1MB. Free memory was 46.7MB in the beginning and 46.7MB in the end (delta: 47.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 19:13:17,944 INFO L158 Benchmark]: CACSL2BoogieTranslator took 627.80ms. Allocated memory is still 88.1MB. Free memory was 54.1MB in the beginning and 45.1MB in the end (delta: 9.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-22 19:13:17,945 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 88.1MB. Free memory was 46.7MB in the beginning and 46.7MB in the end (delta: 47.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 627.80ms. Allocated memory is still 88.1MB. Free memory was 54.1MB in the beginning and 45.1MB in the end (delta: 9.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: 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_test10-3.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 c098eb2ea0abe7b0f4b25f613d67df9ef36b2215e5396f258b75924d2167f9c8 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 19:13:19,763 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 19:13:19,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 19:13:19,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 19:13:19,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 19:13:19,794 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 19:13:19,797 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 19:13:19,803 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 19:13:19,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 19:13:19,809 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 19:13:19,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 19:13:19,814 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 19:13:19,815 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 19:13:19,817 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 19:13:19,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 19:13:19,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 19:13:19,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 19:13:19,822 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 19:13:19,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 19:13:19,830 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 19:13:19,832 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 19:13:19,833 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 19:13:19,835 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 19:13:19,836 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 19:13:19,843 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 19:13:19,844 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 19:13:19,844 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 19:13:19,846 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 19:13:19,846 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 19:13:19,847 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 19:13:19,848 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 19:13:19,848 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 19:13:19,850 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 19:13:19,851 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 19:13:19,852 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 19:13:19,852 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 19:13:19,853 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 19:13:19,853 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 19:13:19,853 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 19:13:19,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 19:13:19,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 19:13:19,859 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-22 19:13:19,893 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 19:13:19,894 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 19:13:19,895 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 19:13:19,895 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 19:13:19,896 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 19:13:19,896 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 19:13:19,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 19:13:19,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 19:13:19,898 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 19:13:19,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 19:13:19,899 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 19:13:19,899 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 19:13:19,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 19:13:19,900 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 19:13:19,900 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 19:13:19,900 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 19:13:19,900 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 19:13:19,900 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 19:13:19,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 19:13:19,901 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 19:13:19,901 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-22 19:13:19,901 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-22 19:13:19,901 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 19:13:19,902 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 19:13:19,902 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 19:13:19,902 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 19:13:19,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 19:13:19,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 19:13:19,903 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 19:13:19,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 19:13:19,903 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-22 19:13:19,903 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-22 19:13:19,904 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 19:13:19,904 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-22 19:13:19,904 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c098eb2ea0abe7b0f4b25f613d67df9ef36b2215e5396f258b75924d2167f9c8 [2021-12-22 19:13:20,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 19:13:20,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 19:13:20,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 19:13:20,283 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 19:13:20,284 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 19:13:20,285 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-3.i [2021-12-22 19:13:20,339 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1883db6fe/b01ffab3305d4a40bcd11b7cfe943355/FLAG9a87d6ae9 [2021-12-22 19:13:20,961 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 19:13:20,962 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-3.i [2021-12-22 19:13:20,980 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1883db6fe/b01ffab3305d4a40bcd11b7cfe943355/FLAG9a87d6ae9 [2021-12-22 19:13:21,180 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1883db6fe/b01ffab3305d4a40bcd11b7cfe943355 [2021-12-22 19:13:21,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 19:13:21,185 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 19:13:21,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 19:13:21,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 19:13:21,193 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 19:13:21,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:13:21" (1/1) ... [2021-12-22 19:13:21,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@557268fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:13:21, skipping insertion in model container [2021-12-22 19:13:21,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:13:21" (1/1) ... [2021-12-22 19:13:21,202 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 19:13:21,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 19:13:21,671 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_test10-3.i[33022,33035] [2021-12-22 19:13:21,945 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:13:21,956 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-22 19:13:21,967 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 19:13:21,990 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_test10-3.i[33022,33035] [2021-12-22 19:13:22,117 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:13:22,124 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 19:13:22,157 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_test10-3.i[33022,33035] [2021-12-22 19:13:22,286 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:13:22,321 INFO L208 MainTranslator]: Completed translation [2021-12-22 19:13:22,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:13:22 WrapperNode [2021-12-22 19:13:22,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 19:13:22,323 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 19:13:22,323 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 19:13:22,323 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 19:13:22,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:13:22" (1/1) ... [2021-12-22 19:13:22,412 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:13:22" (1/1) ... [2021-12-22 19:13:22,511 INFO L137 Inliner]: procedures = 180, calls = 623, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2491 [2021-12-22 19:13:22,512 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 19:13:22,513 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 19:13:22,513 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 19:13:22,513 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 19:13:22,520 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:13:22" (1/1) ... [2021-12-22 19:13:22,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:13:22" (1/1) ... [2021-12-22 19:13:22,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:13:22" (1/1) ... [2021-12-22 19:13:22,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:13:22" (1/1) ... [2021-12-22 19:13:22,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:13:22" (1/1) ... [2021-12-22 19:13:22,685 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:13:22" (1/1) ... [2021-12-22 19:13:22,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:13:22" (1/1) ... [2021-12-22 19:13:22,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 19:13:22,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 19:13:22,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 19:13:22,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 19:13:22,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:13:22" (1/1) ... [2021-12-22 19:13:22,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 19:13:22,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:13:22,759 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) [2021-12-22 19:13:22,791 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 [2021-12-22 19:13:22,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-22 19:13:22,806 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2021-12-22 19:13:22,806 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2021-12-22 19:13:22,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-22 19:13:22,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-22 19:13:22,807 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-22 19:13:22,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-22 19:13:22,807 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-22 19:13:22,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 19:13:22,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 19:13:22,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 19:13:22,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 19:13:22,808 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-22 19:13:22,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 19:13:22,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 19:13:22,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-22 19:13:22,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-22 19:13:22,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 19:13:22,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 19:13:23,174 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 19:13:23,175 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 19:13:23,179 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 19:13:31,142 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 19:13:31,163 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 19:13:31,164 INFO L299 CfgBuilder]: Removed 168 assume(true) statements. [2021-12-22 19:13:31,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:13:31 BoogieIcfgContainer [2021-12-22 19:13:31,168 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 19:13:31,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 19:13:31,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 19:13:31,173 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 19:13:31,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:13:21" (1/3) ... [2021-12-22 19:13:31,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b9930e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:13:31, skipping insertion in model container [2021-12-22 19:13:31,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:13:22" (2/3) ... [2021-12-22 19:13:31,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b9930e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:13:31, skipping insertion in model container [2021-12-22 19:13:31,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:13:31" (3/3) ... [2021-12-22 19:13:31,175 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test10-3.i [2021-12-22 19:13:31,180 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 19:13:31,181 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1193 error locations. [2021-12-22 19:13:31,218 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 19:13:31,224 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 [2021-12-22 19:13:31,225 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1193 error locations. [2021-12-22 19:13:31,282 INFO L276 IsEmpty]: Start isEmpty. Operand has 2437 states, 1232 states have (on average 2.2280844155844157) internal successors, (2745), 2423 states have internal predecessors, (2745), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-22 19:13:31,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-22 19:13:31,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:13:31,288 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-22 19:13:31,288 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-12-22 19:13:31,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:13:31,292 INFO L85 PathProgramCache]: Analyzing trace with hash 66598, now seen corresponding path program 1 times [2021-12-22 19:13:31,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:13:31,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477367163] [2021-12-22 19:13:31,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:13:31,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:13:31,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:13:31,305 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) [2021-12-22 19:13:31,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-22 19:13:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:13:31,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 19:13:31,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:13:31,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 19:13:31,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:13:31,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:13:31,642 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:13:31,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477367163] [2021-12-22 19:13:31,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477367163] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:13:31,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:13:31,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 19:13:31,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785526228] [2021-12-22 19:13:31,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:13:31,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:13:31,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:13:31,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:13:31,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:13:31,677 INFO L87 Difference]: Start difference. First operand has 2437 states, 1232 states have (on average 2.2280844155844157) internal successors, (2745), 2423 states have internal predecessors, (2745), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2021-12-22 19:13:35,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:13:35,766 INFO L93 Difference]: Finished difference Result 3281 states and 3483 transitions. [2021-12-22 19:13:35,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:13:35,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2021-12-22 19:13:35,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:13:35,802 INFO L225 Difference]: With dead ends: 3281 [2021-12-22 19:13:35,802 INFO L226 Difference]: Without dead ends: 3279 [2021-12-22 19:13:35,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:13:35,810 INFO L933 BasicCegarLoop]: 1665 mSDtfsCounter, 2318 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2328 SdHoareTripleChecker+Valid, 2230 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-22 19:13:35,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2328 Valid, 2230 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1661 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-12-22 19:13:35,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2021-12-22 19:13:35,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 2579. [2021-12-22 19:13:35,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2579 states, 1398 states have (on average 2.067238912732475) internal successors, (2890), 2563 states have internal predecessors, (2890), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-22 19:13:35,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2579 states to 2579 states and 2922 transitions. [2021-12-22 19:13:35,946 INFO L78 Accepts]: Start accepts. Automaton has 2579 states and 2922 transitions. Word has length 3 [2021-12-22 19:13:35,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:13:35,947 INFO L470 AbstractCegarLoop]: Abstraction has 2579 states and 2922 transitions. [2021-12-22 19:13:35,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2021-12-22 19:13:35,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2579 states and 2922 transitions. [2021-12-22 19:13:35,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-22 19:13:35,948 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:13:35,948 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-22 19:13:35,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-22 19:13:36,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:13:36,160 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-12-22 19:13:36,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:13:36,160 INFO L85 PathProgramCache]: Analyzing trace with hash 66599, now seen corresponding path program 1 times [2021-12-22 19:13:36,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:13:36,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [235497301] [2021-12-22 19:13:36,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:13:36,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:13:36,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:13:36,165 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) [2021-12-22 19:13:36,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-22 19:13:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:13:36,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 19:13:36,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:13:36,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 19:13:36,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:13:36,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:13:36,432 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:13:36,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [235497301] [2021-12-22 19:13:36,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [235497301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:13:36,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:13:36,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 19:13:36,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057695718] [2021-12-22 19:13:36,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:13:36,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:13:36,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:13:36,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:13:36,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:13:36,440 INFO L87 Difference]: Start difference. First operand 2579 states and 2922 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2021-12-22 19:13:41,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:13:41,440 INFO L93 Difference]: Finished difference Result 3727 states and 4170 transitions. [2021-12-22 19:13:41,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:13:41,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2021-12-22 19:13:41,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:13:41,453 INFO L225 Difference]: With dead ends: 3727 [2021-12-22 19:13:41,454 INFO L226 Difference]: Without dead ends: 3727 [2021-12-22 19:13:41,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:13:41,455 INFO L933 BasicCegarLoop]: 2045 mSDtfsCounter, 1240 mSDsluCounter, 1388 mSDsCounter, 0 mSdLazyCounter, 1695 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1244 SdHoareTripleChecker+Valid, 3433 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-22 19:13:41,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1244 Valid, 3433 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1695 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-12-22 19:13:41,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3727 states. [2021-12-22 19:13:41,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3727 to 3028. [2021-12-22 19:13:41,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3028 states, 1845 states have (on average 2.0233062330623306) internal successors, (3733), 3009 states have internal predecessors, (3733), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-22 19:13:41,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3028 states to 3028 states and 3771 transitions. [2021-12-22 19:13:41,516 INFO L78 Accepts]: Start accepts. Automaton has 3028 states and 3771 transitions. Word has length 3 [2021-12-22 19:13:41,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:13:41,517 INFO L470 AbstractCegarLoop]: Abstraction has 3028 states and 3771 transitions. [2021-12-22 19:13:41,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2021-12-22 19:13:41,517 INFO L276 IsEmpty]: Start isEmpty. Operand 3028 states and 3771 transitions. [2021-12-22 19:13:41,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 19:13:41,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:13:41,518 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:13:41,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-22 19:13:41,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:13:41,726 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-12-22 19:13:41,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:13:41,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1375609072, now seen corresponding path program 1 times [2021-12-22 19:13:41,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:13:41,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592904734] [2021-12-22 19:13:41,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:13:41,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:13:41,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:13:41,731 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) [2021-12-22 19:13:41,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-22 19:13:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:13:41,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 19:13:41,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:13:41,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 19:13:41,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 19:13:42,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 19:13:42,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-22 19:13:42,064 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 19:13:42,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2021-12-22 19:13:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:13:42,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:13:42,118 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:13:42,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592904734] [2021-12-22 19:13:42,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592904734] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:13:42,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:13:42,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:13:42,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735198690] [2021-12-22 19:13:42,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:13:42,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:13:42,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:13:42,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:13:42,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:13:42,122 INFO L87 Difference]: Start difference. First operand 3028 states and 3771 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-12-22 19:13:51,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:13:51,525 INFO L93 Difference]: Finished difference Result 6006 states and 6937 transitions. [2021-12-22 19:13:51,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:13:51,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-12-22 19:13:51,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:13:51,544 INFO L225 Difference]: With dead ends: 6006 [2021-12-22 19:13:51,545 INFO L226 Difference]: Without dead ends: 6006 [2021-12-22 19:13:51,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:13:51,546 INFO L933 BasicCegarLoop]: 981 mSDtfsCounter, 3127 mSDsluCounter, 2181 mSDsCounter, 0 mSdLazyCounter, 4719 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3137 SdHoareTripleChecker+Valid, 3162 SdHoareTripleChecker+Invalid, 4747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 4719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2021-12-22 19:13:51,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3137 Valid, 3162 Invalid, 4747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 4719 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2021-12-22 19:13:51,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6006 states. [2021-12-22 19:13:51,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6006 to 3747. [2021-12-22 19:13:51,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3747 states, 2564 states have (on average 2.0514820592823715) internal successors, (5260), 3722 states have internal predecessors, (5260), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:13:51,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3747 states to 3747 states and 5310 transitions. [2021-12-22 19:13:51,626 INFO L78 Accepts]: Start accepts. Automaton has 3747 states and 5310 transitions. Word has length 7 [2021-12-22 19:13:51,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:13:51,627 INFO L470 AbstractCegarLoop]: Abstraction has 3747 states and 5310 transitions. [2021-12-22 19:13:51,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-12-22 19:13:51,627 INFO L276 IsEmpty]: Start isEmpty. Operand 3747 states and 5310 transitions. [2021-12-22 19:13:51,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 19:13:51,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:13:51,628 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:13:51,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-22 19:13:51,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:13:51,840 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-12-22 19:13:51,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:13:51,841 INFO L85 PathProgramCache]: Analyzing trace with hash -305791726, now seen corresponding path program 1 times [2021-12-22 19:13:51,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:13:51,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862568150] [2021-12-22 19:13:51,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:13:51,842 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:13:51,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:13:51,843 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) [2021-12-22 19:13:51,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-22 19:13:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:13:52,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 19:13:52,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:13:52,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 19:13:52,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:13:52,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:13:52,034 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:13:52,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862568150] [2021-12-22 19:13:52,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1862568150] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:13:52,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:13:52,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 19:13:52,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314836491] [2021-12-22 19:13:52,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:13:52,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:13:52,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:13:52,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:13:52,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:13:52,037 INFO L87 Difference]: Start difference. First operand 3747 states and 5310 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-12-22 19:13:54,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:13:54,684 INFO L93 Difference]: Finished difference Result 4951 states and 6827 transitions. [2021-12-22 19:13:54,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:13:54,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2021-12-22 19:13:54,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:13:54,698 INFO L225 Difference]: With dead ends: 4951 [2021-12-22 19:13:54,699 INFO L226 Difference]: Without dead ends: 4951 [2021-12-22 19:13:54,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:13:54,700 INFO L933 BasicCegarLoop]: 2366 mSDtfsCounter, 1998 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2008 SdHoareTripleChecker+Valid, 3212 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-22 19:13:54,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2008 Valid, 3212 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1577 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-22 19:13:54,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4951 states. [2021-12-22 19:13:54,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4951 to 3656. [2021-12-22 19:13:54,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3656 states, 2564 states have (on average 1.968408736349454) internal successors, (5047), 3631 states have internal predecessors, (5047), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:13:54,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3656 states to 3656 states and 5097 transitions. [2021-12-22 19:13:54,780 INFO L78 Accepts]: Start accepts. Automaton has 3656 states and 5097 transitions. Word has length 8 [2021-12-22 19:13:54,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:13:54,780 INFO L470 AbstractCegarLoop]: Abstraction has 3656 states and 5097 transitions. [2021-12-22 19:13:54,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-12-22 19:13:54,781 INFO L276 IsEmpty]: Start isEmpty. Operand 3656 states and 5097 transitions. [2021-12-22 19:13:54,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 19:13:54,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:13:54,782 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:13:54,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-22 19:13:54,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:13:54,991 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-12-22 19:13:54,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:13:54,991 INFO L85 PathProgramCache]: Analyzing trace with hash -305791725, now seen corresponding path program 1 times [2021-12-22 19:13:54,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:13:54,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556392822] [2021-12-22 19:13:54,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:13:54,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:13:54,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:13:54,993 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) [2021-12-22 19:13:54,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-22 19:13:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:13:55,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 19:13:55,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:13:55,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 19:13:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:13:55,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:13:55,205 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:13:55,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556392822] [2021-12-22 19:13:55,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556392822] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:13:55,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:13:55,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 19:13:55,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366305733] [2021-12-22 19:13:55,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:13:55,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:13:55,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:13:55,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:13:55,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:13:55,207 INFO L87 Difference]: Start difference. First operand 3656 states and 5097 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-12-22 19:13:59,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:13:59,332 INFO L93 Difference]: Finished difference Result 5371 states and 7455 transitions. [2021-12-22 19:13:59,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:13:59,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2021-12-22 19:13:59,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:13:59,346 INFO L225 Difference]: With dead ends: 5371 [2021-12-22 19:13:59,346 INFO L226 Difference]: Without dead ends: 5371 [2021-12-22 19:13:59,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:13:59,347 INFO L933 BasicCegarLoop]: 2746 mSDtfsCounter, 1369 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 1670 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 3931 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:13:59,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1373 Valid, 3931 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1670 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-12-22 19:13:59,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5371 states. [2021-12-22 19:13:59,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5371 to 3978. [2021-12-22 19:13:59,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 2896 states have (on average 1.9540745856353592) internal successors, (5659), 3953 states have internal predecessors, (5659), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:13:59,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 5709 transitions. [2021-12-22 19:13:59,415 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 5709 transitions. Word has length 8 [2021-12-22 19:13:59,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:13:59,416 INFO L470 AbstractCegarLoop]: Abstraction has 3978 states and 5709 transitions. [2021-12-22 19:13:59,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-12-22 19:13:59,416 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 5709 transitions. [2021-12-22 19:13:59,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 19:13:59,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:13:59,417 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:13:59,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-22 19:13:59,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:13:59,626 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-12-22 19:13:59,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:13:59,627 INFO L85 PathProgramCache]: Analyzing trace with hash -690352907, now seen corresponding path program 1 times [2021-12-22 19:13:59,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:13:59,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539530727] [2021-12-22 19:13:59,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:13:59,628 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:13:59,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:13:59,629 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) [2021-12-22 19:13:59,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-22 19:13:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:13:59,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 19:13:59,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:13:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:13:59,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:13:59,823 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:13:59,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539530727] [2021-12-22 19:13:59,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539530727] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:13:59,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:13:59,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:13:59,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109674596] [2021-12-22 19:13:59,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:13:59,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:13:59,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:13:59,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:13:59,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:13:59,825 INFO L87 Difference]: Start difference. First operand 3978 states and 5709 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) [2021-12-22 19:13:59,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:13:59,865 INFO L93 Difference]: Finished difference Result 3918 states and 5623 transitions. [2021-12-22 19:13:59,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:13:59,866 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 [2021-12-22 19:13:59,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:13:59,884 INFO L225 Difference]: With dead ends: 3918 [2021-12-22 19:13:59,884 INFO L226 Difference]: Without dead ends: 3918 [2021-12-22 19:13:59,885 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 [2021-12-22 19:13:59,887 INFO L933 BasicCegarLoop]: 2407 mSDtfsCounter, 1197 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1201 SdHoareTripleChecker+Valid, 3623 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 [2021-12-22 19:13:59,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1201 Valid, 3623 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:13:59,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3918 states. [2021-12-22 19:13:59,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3918 to 3918. [2021-12-22 19:13:59,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 2860 states have (on average 1.9486013986013986) internal successors, (5573), 3893 states have internal predecessors, (5573), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:13:59,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 5623 transitions. [2021-12-22 19:13:59,951 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 5623 transitions. Word has length 11 [2021-12-22 19:13:59,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:13:59,952 INFO L470 AbstractCegarLoop]: Abstraction has 3918 states and 5623 transitions. [2021-12-22 19:13:59,952 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) [2021-12-22 19:13:59,953 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 5623 transitions. [2021-12-22 19:13:59,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-22 19:13:59,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:13:59,953 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:13:59,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-22 19:14:00,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:14:00,163 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-12-22 19:14:00,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:14:00,163 INFO L85 PathProgramCache]: Analyzing trace with hash -2004126129, now seen corresponding path program 1 times [2021-12-22 19:14:00,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:14:00,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [954146502] [2021-12-22 19:14:00,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:14:00,164 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:14:00,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:14:00,165 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) [2021-12-22 19:14:00,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-22 19:14:00,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:14:00,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 19:14:00,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:14:00,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:14:00,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:14:00,376 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:14:00,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [954146502] [2021-12-22 19:14:00,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [954146502] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:14:00,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:14:00,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 19:14:00,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727106860] [2021-12-22 19:14:00,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:14:00,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:14:00,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:14:00,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:14:00,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:14:00,379 INFO L87 Difference]: Start difference. First operand 3918 states and 5623 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) [2021-12-22 19:14:00,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:14:00,463 INFO L93 Difference]: Finished difference Result 3890 states and 5567 transitions. [2021-12-22 19:14:00,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:14:00,463 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 [2021-12-22 19:14:00,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:14:00,471 INFO L225 Difference]: With dead ends: 3890 [2021-12-22 19:14:00,472 INFO L226 Difference]: Without dead ends: 3890 [2021-12-22 19:14:00,472 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 [2021-12-22 19:14:00,473 INFO L933 BasicCegarLoop]: 2362 mSDtfsCounter, 1168 mSDsluCounter, 3571 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1172 SdHoareTripleChecker+Valid, 5933 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 [2021-12-22 19:14:00,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1172 Valid, 5933 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:14:00,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3890 states. [2021-12-22 19:14:00,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3890 to 3888. [2021-12-22 19:14:00,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3888 states, 2844 states have (on average 1.939170182841069) internal successors, (5515), 3863 states have internal predecessors, (5515), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:14:00,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3888 states to 3888 states and 5565 transitions. [2021-12-22 19:14:00,547 INFO L78 Accepts]: Start accepts. Automaton has 3888 states and 5565 transitions. Word has length 13 [2021-12-22 19:14:00,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:14:00,548 INFO L470 AbstractCegarLoop]: Abstraction has 3888 states and 5565 transitions. [2021-12-22 19:14:00,548 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) [2021-12-22 19:14:00,549 INFO L276 IsEmpty]: Start isEmpty. Operand 3888 states and 5565 transitions. [2021-12-22 19:14:00,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 19:14:00,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:14:00,550 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] [2021-12-22 19:14:00,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-22 19:14:00,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:14:00,760 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-12-22 19:14:00,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:14:00,760 INFO L85 PathProgramCache]: Analyzing trace with hash 445820063, now seen corresponding path program 1 times [2021-12-22 19:14:00,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:14:00,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [95230503] [2021-12-22 19:14:00,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:14:00,761 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:14:00,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:14:00,762 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) [2021-12-22 19:14:00,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-22 19:14:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:14:00,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 19:14:00,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:14:01,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:14:01,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:14:01,019 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:14:01,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [95230503] [2021-12-22 19:14:01,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [95230503] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:14:01,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:14:01,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:14:01,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456684608] [2021-12-22 19:14:01,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:14:01,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:14:01,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:14:01,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:14:01,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:14:01,022 INFO L87 Difference]: Start difference. First operand 3888 states and 5565 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-12-22 19:14:01,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:14:01,077 INFO L93 Difference]: Finished difference Result 5514 states and 7318 transitions. [2021-12-22 19:14:01,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:14:01,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 20 [2021-12-22 19:14:01,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:14:01,088 INFO L225 Difference]: With dead ends: 5514 [2021-12-22 19:14:01,089 INFO L226 Difference]: Without dead ends: 5514 [2021-12-22 19:14:01,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:14:01,090 INFO L933 BasicCegarLoop]: 4091 mSDtfsCounter, 2288 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2298 SdHoareTripleChecker+Valid, 5893 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 [2021-12-22 19:14:01,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2298 Valid, 5893 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:14:01,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5514 states. [2021-12-22 19:14:01,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5514 to 3828. [2021-12-22 19:14:01,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 2808 states have (on average 1.9334045584045585) internal successors, (5429), 3803 states have internal predecessors, (5429), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:14:01,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 5479 transitions. [2021-12-22 19:14:01,169 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 5479 transitions. Word has length 20 [2021-12-22 19:14:01,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:14:01,170 INFO L470 AbstractCegarLoop]: Abstraction has 3828 states and 5479 transitions. [2021-12-22 19:14:01,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-12-22 19:14:01,170 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 5479 transitions. [2021-12-22 19:14:01,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 19:14:01,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:14:01,171 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] [2021-12-22 19:14:01,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-22 19:14:01,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:14:01,383 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-12-22 19:14:01,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:14:01,383 INFO L85 PathProgramCache]: Analyzing trace with hash 591123743, now seen corresponding path program 1 times [2021-12-22 19:14:01,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:14:01,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [942238446] [2021-12-22 19:14:01,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:14:01,384 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:14:01,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:14:01,386 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) [2021-12-22 19:14:01,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-22 19:14:01,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:14:01,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 19:14:01,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:14:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:14:01,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:14:01,657 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:14:01,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [942238446] [2021-12-22 19:14:01,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [942238446] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:14:01,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:14:01,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:14:01,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552446577] [2021-12-22 19:14:01,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:14:01,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:14:01,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:14:01,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:14:01,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:14:01,659 INFO L87 Difference]: Start difference. First operand 3828 states and 5479 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-12-22 19:14:01,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:14:01,705 INFO L93 Difference]: Finished difference Result 5347 states and 7027 transitions. [2021-12-22 19:14:01,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:14:01,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 20 [2021-12-22 19:14:01,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:14:01,717 INFO L225 Difference]: With dead ends: 5347 [2021-12-22 19:14:01,717 INFO L226 Difference]: Without dead ends: 5347 [2021-12-22 19:14:01,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:14:01,718 INFO L933 BasicCegarLoop]: 3778 mSDtfsCounter, 2245 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2255 SdHoareTripleChecker+Valid, 5532 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 [2021-12-22 19:14:01,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2255 Valid, 5532 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:14:01,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5347 states. [2021-12-22 19:14:01,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5347 to 3696. [2021-12-22 19:14:01,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3696 states, 2700 states have (on average 1.915185185185185) internal successors, (5171), 3671 states have internal predecessors, (5171), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:14:01,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3696 states to 3696 states and 5221 transitions. [2021-12-22 19:14:01,780 INFO L78 Accepts]: Start accepts. Automaton has 3696 states and 5221 transitions. Word has length 20 [2021-12-22 19:14:01,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:14:01,780 INFO L470 AbstractCegarLoop]: Abstraction has 3696 states and 5221 transitions. [2021-12-22 19:14:01,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-12-22 19:14:01,781 INFO L276 IsEmpty]: Start isEmpty. Operand 3696 states and 5221 transitions. [2021-12-22 19:14:01,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 19:14:01,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:14:01,781 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] [2021-12-22 19:14:01,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-22 19:14:01,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:14:01,993 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-12-22 19:14:01,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:14:01,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1063651591, now seen corresponding path program 1 times [2021-12-22 19:14:01,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:14:01,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478520481] [2021-12-22 19:14:01,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:14:01,994 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:14:01,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:14:01,995 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) [2021-12-22 19:14:01,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-22 19:14:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:14:02,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 19:14:02,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:14:02,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:14:02,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:14:02,252 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:14:02,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478520481] [2021-12-22 19:14:02,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478520481] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:14:02,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:14:02,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 19:14:02,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700256940] [2021-12-22 19:14:02,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:14:02,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:14:02,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:14:02,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:14:02,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:14:02,255 INFO L87 Difference]: Start difference. First operand 3696 states and 5221 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2021-12-22 19:14:02,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:14:02,336 INFO L93 Difference]: Finished difference Result 5312 states and 6961 transitions. [2021-12-22 19:14:02,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:14:02,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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 22 [2021-12-22 19:14:02,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:14:02,347 INFO L225 Difference]: With dead ends: 5312 [2021-12-22 19:14:02,347 INFO L226 Difference]: Without dead ends: 5312 [2021-12-22 19:14:02,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:14:02,348 INFO L933 BasicCegarLoop]: 3960 mSDtfsCounter, 2216 mSDsluCounter, 5712 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2226 SdHoareTripleChecker+Valid, 9672 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 [2021-12-22 19:14:02,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2226 Valid, 9672 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:14:02,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5312 states. [2021-12-22 19:14:02,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5312 to 3666. [2021-12-22 19:14:02,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3666 states, 2684 states have (on average 1.9049925484351713) internal successors, (5113), 3641 states have internal predecessors, (5113), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:14:02,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3666 states to 3666 states and 5163 transitions. [2021-12-22 19:14:02,408 INFO L78 Accepts]: Start accepts. Automaton has 3666 states and 5163 transitions. Word has length 22 [2021-12-22 19:14:02,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:14:02,409 INFO L470 AbstractCegarLoop]: Abstraction has 3666 states and 5163 transitions. [2021-12-22 19:14:02,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2021-12-22 19:14:02,409 INFO L276 IsEmpty]: Start isEmpty. Operand 3666 states and 5163 transitions. [2021-12-22 19:14:02,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 19:14:02,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:14:02,410 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] [2021-12-22 19:14:02,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-22 19:14:02,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:14:02,620 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr359REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-12-22 19:14:02,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:14:02,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1134259450, now seen corresponding path program 1 times [2021-12-22 19:14:02,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:14:02,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538147141] [2021-12-22 19:14:02,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:14:02,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:14:02,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:14:02,622 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) [2021-12-22 19:14:02,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-22 19:14:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:14:02,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 19:14:02,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:14:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:14:02,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:14:02,852 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:14:02,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538147141] [2021-12-22 19:14:02,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538147141] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:14:02,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:14:02,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 19:14:02,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526719885] [2021-12-22 19:14:02,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:14:02,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:14:02,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:14:02,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:14:02,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:14:02,854 INFO L87 Difference]: Start difference. First operand 3666 states and 5163 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2021-12-22 19:14:02,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:14:02,965 INFO L93 Difference]: Finished difference Result 5239 states and 6772 transitions. [2021-12-22 19:14:02,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:14:02,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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 22 [2021-12-22 19:14:02,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:14:02,974 INFO L225 Difference]: With dead ends: 5239 [2021-12-22 19:14:02,974 INFO L226 Difference]: Without dead ends: 5239 [2021-12-22 19:14:02,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:14:02,975 INFO L933 BasicCegarLoop]: 3885 mSDtfsCounter, 2181 mSDsluCounter, 5597 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2191 SdHoareTripleChecker+Valid, 9482 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 [2021-12-22 19:14:02,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2191 Valid, 9482 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:14:02,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5239 states. [2021-12-22 19:14:03,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5239 to 3604. [2021-12-22 19:14:03,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3604 states, 2636 states have (on average 1.8736722306525038) internal successors, (4939), 3579 states have internal predecessors, (4939), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:14:03,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3604 states to 3604 states and 4989 transitions. [2021-12-22 19:14:03,032 INFO L78 Accepts]: Start accepts. Automaton has 3604 states and 4989 transitions. Word has length 22 [2021-12-22 19:14:03,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:14:03,033 INFO L470 AbstractCegarLoop]: Abstraction has 3604 states and 4989 transitions. [2021-12-22 19:14:03,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2021-12-22 19:14:03,034 INFO L276 IsEmpty]: Start isEmpty. Operand 3604 states and 4989 transitions. [2021-12-22 19:14:03,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 19:14:03,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:14:03,035 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] [2021-12-22 19:14:03,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-22 19:14:03,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:14:03,246 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-12-22 19:14:03,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:14:03,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519613, now seen corresponding path program 1 times [2021-12-22 19:14:03,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:14:03,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1133417528] [2021-12-22 19:14:03,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:14:03,247 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:14:03,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:14:03,248 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) [2021-12-22 19:14:03,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-22 19:14:03,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:14:03,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 19:14:03,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:14:03,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 19:14:03,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:14:03,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:14:03,517 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:14:03,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1133417528] [2021-12-22 19:14:03,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1133417528] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:14:03,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:14:03,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:14:03,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161655267] [2021-12-22 19:14:03,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:14:03,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:14:03,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:14:03,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:14:03,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:14:03,519 INFO L87 Difference]: Start difference. First operand 3604 states and 4989 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) [2021-12-22 19:14:06,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:14:06,948 INFO L93 Difference]: Finished difference Result 4225 states and 5525 transitions. [2021-12-22 19:14:06,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:14:06,949 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 [2021-12-22 19:14:06,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:14:06,960 INFO L225 Difference]: With dead ends: 4225 [2021-12-22 19:14:06,960 INFO L226 Difference]: Without dead ends: 4225 [2021-12-22 19:14:06,960 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 [2021-12-22 19:14:06,961 INFO L933 BasicCegarLoop]: 1515 mSDtfsCounter, 3097 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 2082 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3103 SdHoareTripleChecker+Valid, 2793 SdHoareTripleChecker+Invalid, 2103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-22 19:14:06,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3103 Valid, 2793 Invalid, 2103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2082 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-22 19:14:06,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4225 states. [2021-12-22 19:14:07,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4225 to 3600. [2021-12-22 19:14:07,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3600 states, 2636 states have (on average 1.8706373292867982) internal successors, (4931), 3575 states have internal predecessors, (4931), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:14:07,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3600 states to 3600 states and 4981 transitions. [2021-12-22 19:14:07,016 INFO L78 Accepts]: Start accepts. Automaton has 3600 states and 4981 transitions. Word has length 27 [2021-12-22 19:14:07,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:14:07,016 INFO L470 AbstractCegarLoop]: Abstraction has 3600 states and 4981 transitions. [2021-12-22 19:14:07,016 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) [2021-12-22 19:14:07,017 INFO L276 IsEmpty]: Start isEmpty. Operand 3600 states and 4981 transitions. [2021-12-22 19:14:07,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 19:14:07,017 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:14:07,017 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] [2021-12-22 19:14:07,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-22 19:14:07,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:14:07,235 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-12-22 19:14:07,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:14:07,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519614, now seen corresponding path program 1 times [2021-12-22 19:14:07,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:14:07,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2048899665] [2021-12-22 19:14:07,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:14:07,236 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:14:07,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:14:07,238 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) [2021-12-22 19:14:07,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-22 19:14:07,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:14:07,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 19:14:07,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:14:07,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 19:14:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:14:07,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:14:07,642 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:14:07,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2048899665] [2021-12-22 19:14:07,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2048899665] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:14:07,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:14:07,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:14:07,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404335905] [2021-12-22 19:14:07,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:14:07,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:14:07,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:14:07,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:14:07,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:14:07,644 INFO L87 Difference]: Start difference. First operand 3600 states and 4981 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) [2021-12-22 19:14:12,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:14:12,733 INFO L93 Difference]: Finished difference Result 4679 states and 6151 transitions. [2021-12-22 19:14:12,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 19:14:12,733 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 [2021-12-22 19:14:12,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:14:12,740 INFO L225 Difference]: With dead ends: 4679 [2021-12-22 19:14:12,740 INFO L226 Difference]: Without dead ends: 4679 [2021-12-22 19:14:12,740 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 [2021-12-22 19:14:12,741 INFO L933 BasicCegarLoop]: 1748 mSDtfsCounter, 2279 mSDsluCounter, 2351 mSDsCounter, 0 mSdLazyCounter, 2575 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2279 SdHoareTripleChecker+Valid, 4099 SdHoareTripleChecker+Invalid, 2587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:14:12,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2279 Valid, 4099 Invalid, 2587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2575 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-12-22 19:14:12,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4679 states. [2021-12-22 19:14:12,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4679 to 3636. [2021-12-22 19:14:12,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 2672 states have (on average 1.8607784431137724) internal successors, (4972), 3611 states have internal predecessors, (4972), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:14:12,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 5022 transitions. [2021-12-22 19:14:12,815 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 5022 transitions. Word has length 27 [2021-12-22 19:14:12,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:14:12,815 INFO L470 AbstractCegarLoop]: Abstraction has 3636 states and 5022 transitions. [2021-12-22 19:14:12,816 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) [2021-12-22 19:14:12,816 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 5022 transitions. [2021-12-22 19:14:12,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 19:14:12,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:14:12,819 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] [2021-12-22 19:14:12,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-22 19:14:13,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:14:13,029 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-12-22 19:14:13,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:14:13,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128551, now seen corresponding path program 1 times [2021-12-22 19:14:13,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:14:13,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775938868] [2021-12-22 19:14:13,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:14:13,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:14:13,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:14:13,032 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) [2021-12-22 19:14:13,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-22 19:14:13,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:14:13,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 19:14:13,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:14:13,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 19:14:13,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:14:13,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:14:13,326 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:14:13,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775938868] [2021-12-22 19:14:13,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775938868] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:14:13,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:14:13,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:14:13,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958148917] [2021-12-22 19:14:13,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:14:13,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:14:13,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:14:13,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:14:13,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:14:13,327 INFO L87 Difference]: Start difference. First operand 3636 states and 5022 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 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)