./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c78ec383567aee735f8895b5666134248c3b9de1b96295d83b3c1c6979534c2b --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 08:48:36,682 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 08:48:36,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 08:48:36,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 08:48:36,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 08:48:36,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 08:48:36,748 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 08:48:36,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 08:48:36,754 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 08:48:36,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 08:48:36,756 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 08:48:36,757 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 08:48:36,757 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 08:48:36,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 08:48:36,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 08:48:36,765 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 08:48:36,769 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 08:48:36,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 08:48:36,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 08:48:36,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 08:48:36,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 08:48:36,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 08:48:36,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 08:48:36,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 08:48:36,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 08:48:36,785 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 08:48:36,785 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 08:48:36,786 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 08:48:36,787 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 08:48:36,788 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 08:48:36,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 08:48:36,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 08:48:36,790 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 08:48:36,790 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 08:48:36,791 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 08:48:36,792 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 08:48:36,792 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 08:48:36,793 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 08:48:36,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 08:48:36,794 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 08:48:36,794 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 08:48:36,795 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-16 08:48:36,817 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 08:48:36,827 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 08:48:36,827 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 08:48:36,827 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 08:48:36,828 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 08:48:36,828 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 08:48:36,829 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 08:48:36,829 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 08:48:36,829 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 08:48:36,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 08:48:36,829 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 08:48:36,829 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 08:48:36,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 08:48:36,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 08:48:36,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 08:48:36,829 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 08:48:36,830 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 08:48:36,830 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 08:48:36,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 08:48:36,830 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 08:48:36,830 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 08:48:36,830 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 08:48:36,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 08:48:36,830 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 08:48:36,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 08:48:36,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 08:48:36,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 08:48:36,831 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 08:48:36,831 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 08:48:36,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 08:48:36,831 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 08:48:36,831 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c78ec383567aee735f8895b5666134248c3b9de1b96295d83b3c1c6979534c2b [2021-12-16 08:48:37,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 08:48:37,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 08:48:37,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 08:48:37,077 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 08:48:37,078 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 08:48:37,079 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-2.i [2021-12-16 08:48:37,159 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/007bc2380/3d7003815b1248a5894f648062f9959d/FLAGa8761a135 [2021-12-16 08:48:37,622 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 08:48:37,622 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-2.i [2021-12-16 08:48:37,657 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/007bc2380/3d7003815b1248a5894f648062f9959d/FLAGa8761a135 [2021-12-16 08:48:38,152 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/007bc2380/3d7003815b1248a5894f648062f9959d [2021-12-16 08:48:38,154 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 08:48:38,155 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 08:48:38,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 08:48:38,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 08:48:38,158 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 08:48:38,159 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 08:48:38" (1/1) ... [2021-12-16 08:48:38,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63b96ffe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:38, skipping insertion in model container [2021-12-16 08:48:38,159 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 08:48:38" (1/1) ... [2021-12-16 08:48:38,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 08:48:38,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 08:48:38,446 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_test5-2.i[33021,33034] [2021-12-16 08:48:38,544 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_test5-2.i[49681,49694] [2021-12-16 08:48:38,553 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 08:48:38,573 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-16 08:48:38,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@268bdec2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:38, skipping insertion in model container [2021-12-16 08:48:38,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 08:48:38,576 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-16 08:48:38,578 INFO L158 Benchmark]: Toolchain (without parser) took 421.77ms. Allocated memory is still 113.2MB. Free memory was 82.8MB in the beginning and 75.1MB in the end (delta: 7.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-16 08:48:38,579 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 113.2MB. Free memory is still 69.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 08:48:38,580 INFO L158 Benchmark]: CACSL2BoogieTranslator took 420.02ms. Allocated memory is still 113.2MB. Free memory was 82.8MB in the beginning and 75.1MB in the end (delta: 7.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-16 08:48:38,581 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 113.2MB. Free memory is still 69.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 420.02ms. Allocated memory is still 113.2MB. Free memory was 82.8MB in the beginning and 75.1MB in the end (delta: 7.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 737]: 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_test5-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c78ec383567aee735f8895b5666134248c3b9de1b96295d83b3c1c6979534c2b --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 08:48:40,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 08:48:40,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 08:48:40,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 08:48:40,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 08:48:40,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 08:48:40,208 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 08:48:40,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 08:48:40,213 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 08:48:40,216 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 08:48:40,217 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 08:48:40,220 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 08:48:40,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 08:48:40,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 08:48:40,223 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 08:48:40,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 08:48:40,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 08:48:40,229 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 08:48:40,231 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 08:48:40,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 08:48:40,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 08:48:40,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 08:48:40,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 08:48:40,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 08:48:40,239 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 08:48:40,239 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 08:48:40,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 08:48:40,240 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 08:48:40,240 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 08:48:40,241 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 08:48:40,241 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 08:48:40,241 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 08:48:40,242 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 08:48:40,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 08:48:40,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 08:48:40,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 08:48:40,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 08:48:40,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 08:48:40,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 08:48:40,244 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 08:48:40,245 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 08:48:40,246 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-16 08:48:40,272 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 08:48:40,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 08:48:40,272 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 08:48:40,273 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 08:48:40,273 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 08:48:40,274 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 08:48:40,274 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 08:48:40,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 08:48:40,275 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 08:48:40,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 08:48:40,276 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 08:48:40,276 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 08:48:40,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 08:48:40,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 08:48:40,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 08:48:40,277 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 08:48:40,277 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 08:48:40,277 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 08:48:40,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 08:48:40,277 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 08:48:40,278 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-16 08:48:40,278 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-16 08:48:40,278 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 08:48:40,278 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 08:48:40,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 08:48:40,278 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 08:48:40,279 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 08:48:40,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 08:48:40,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 08:48:40,279 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 08:48:40,279 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-16 08:48:40,280 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-16 08:48:40,280 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 08:48:40,280 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-16 08:48:40,280 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c78ec383567aee735f8895b5666134248c3b9de1b96295d83b3c1c6979534c2b [2021-12-16 08:48:40,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 08:48:40,549 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 08:48:40,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 08:48:40,551 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 08:48:40,554 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 08:48:40,555 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-2.i [2021-12-16 08:48:40,631 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2193c28f/bbe172f594b84aa5a0454a2ef499b8d3/FLAGfa6945c8f [2021-12-16 08:48:41,105 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 08:48:41,106 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-2.i [2021-12-16 08:48:41,122 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2193c28f/bbe172f594b84aa5a0454a2ef499b8d3/FLAGfa6945c8f [2021-12-16 08:48:41,581 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2193c28f/bbe172f594b84aa5a0454a2ef499b8d3 [2021-12-16 08:48:41,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 08:48:41,590 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 08:48:41,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 08:48:41,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 08:48:41,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 08:48:41,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 08:48:41" (1/1) ... [2021-12-16 08:48:41,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@241777b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:41, skipping insertion in model container [2021-12-16 08:48:41,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 08:48:41" (1/1) ... [2021-12-16 08:48:41,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 08:48:41,634 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 08:48:41,941 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_test5-2.i[33021,33034] [2021-12-16 08:48:42,058 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_test5-2.i[49681,49694] [2021-12-16 08:48:42,071 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 08:48:42,080 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-16 08:48:42,092 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 08:48:42,107 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_test5-2.i[33021,33034] [2021-12-16 08:48:42,153 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_test5-2.i[49681,49694] [2021-12-16 08:48:42,160 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 08:48:42,169 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 08:48:42,184 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_test5-2.i[33021,33034] [2021-12-16 08:48:42,235 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_test5-2.i[49681,49694] [2021-12-16 08:48:42,241 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 08:48:42,269 INFO L208 MainTranslator]: Completed translation [2021-12-16 08:48:42,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:42 WrapperNode [2021-12-16 08:48:42,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 08:48:42,270 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 08:48:42,270 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 08:48:42,271 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 08:48:42,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:42" (1/1) ... [2021-12-16 08:48:42,297 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:42" (1/1) ... [2021-12-16 08:48:42,370 INFO L137 Inliner]: procedures = 180, calls = 439, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1578 [2021-12-16 08:48:42,371 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 08:48:42,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 08:48:42,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 08:48:42,371 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 08:48:42,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:42" (1/1) ... [2021-12-16 08:48:42,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:42" (1/1) ... [2021-12-16 08:48:42,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:42" (1/1) ... [2021-12-16 08:48:42,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:42" (1/1) ... [2021-12-16 08:48:42,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:42" (1/1) ... [2021-12-16 08:48:42,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:42" (1/1) ... [2021-12-16 08:48:42,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:42" (1/1) ... [2021-12-16 08:48:42,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 08:48:42,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 08:48:42,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 08:48:42,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 08:48:42,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:42" (1/1) ... [2021-12-16 08:48:42,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 08:48:42,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 08:48:42,513 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 08:48:42,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 08:48:42,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-16 08:48:42,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-16 08:48:42,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-16 08:48:42,609 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-16 08:48:42,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-16 08:48:42,609 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-16 08:48:42,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 08:48:42,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 08:48:42,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 08:48:42,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 08:48:42,610 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-16 08:48:42,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 08:48:42,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 08:48:42,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-16 08:48:42,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-16 08:48:42,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 08:48:42,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 08:48:42,800 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 08:48:42,802 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 08:48:42,804 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-16 08:48:46,963 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 08:48:46,983 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 08:48:46,984 INFO L301 CfgBuilder]: Removed 92 assume(true) statements. [2021-12-16 08:48:46,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 08:48:46 BoogieIcfgContainer [2021-12-16 08:48:46,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 08:48:46,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 08:48:46,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 08:48:46,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 08:48:46,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 08:48:41" (1/3) ... [2021-12-16 08:48:46,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bc02cbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 08:48:46, skipping insertion in model container [2021-12-16 08:48:46,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:48:42" (2/3) ... [2021-12-16 08:48:46,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bc02cbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 08:48:46, skipping insertion in model container [2021-12-16 08:48:46,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 08:48:46" (3/3) ... [2021-12-16 08:48:46,996 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test5-2.i [2021-12-16 08:48:47,002 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 08:48:47,002 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 834 error locations. [2021-12-16 08:48:47,036 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 08:48:47,040 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 08:48:47,041 INFO L340 AbstractCegarLoop]: Starting to check reachability of 834 error locations. [2021-12-16 08:48:47,068 INFO L276 IsEmpty]: Start isEmpty. Operand has 1655 states, 813 states have (on average 2.2484624846248464) internal successors, (1828), 1646 states have internal predecessors, (1828), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-16 08:48:47,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-16 08:48:47,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:48:47,072 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-16 08:48:47,073 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 830 more)] === [2021-12-16 08:48:47,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:48:47,077 INFO L85 PathProgramCache]: Analyzing trace with hash 37287509, now seen corresponding path program 1 times [2021-12-16 08:48:47,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:48:47,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1561589691] [2021-12-16 08:48:47,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:48:47,085 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:48:47,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:48:47,087 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:48:47,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-16 08:48:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:48:47,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-16 08:48:47,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:48:47,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:48:47,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:48:47,293 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:48:47,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1561589691] [2021-12-16 08:48:47,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1561589691] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:48:47,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:48:47,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 08:48:47,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130037946] [2021-12-16 08:48:47,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:48:47,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 08:48:47,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:48:47,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 08:48:47,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 08:48:47,319 INFO L87 Difference]: Start difference. First operand has 1655 states, 813 states have (on average 2.2484624846248464) internal successors, (1828), 1646 states have internal predecessors, (1828), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:48:47,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:48:47,422 INFO L93 Difference]: Finished difference Result 1637 states and 1731 transitions. [2021-12-16 08:48:47,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 08:48:47,423 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-12-16 08:48:47,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:48:47,442 INFO L225 Difference]: With dead ends: 1637 [2021-12-16 08:48:47,443 INFO L226 Difference]: Without dead ends: 1635 [2021-12-16 08:48:47,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 08:48:47,446 INFO L933 BasicCegarLoop]: 1731 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1731 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 08:48:47,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1731 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 08:48:47,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-12-16 08:48:47,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1635. [2021-12-16 08:48:47,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 804 states have (on average 2.123134328358209) internal successors, (1707), 1626 states have internal predecessors, (1707), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-16 08:48:47,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 1729 transitions. [2021-12-16 08:48:47,548 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 1729 transitions. Word has length 5 [2021-12-16 08:48:47,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:48:47,549 INFO L470 AbstractCegarLoop]: Abstraction has 1635 states and 1729 transitions. [2021-12-16 08:48:47,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:48:47,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 1729 transitions. [2021-12-16 08:48:47,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-16 08:48:47,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:48:47,550 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-16 08:48:47,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-16 08:48:47,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:48:47,757 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 830 more)] === [2021-12-16 08:48:47,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:48:47,760 INFO L85 PathProgramCache]: Analyzing trace with hash 37287571, now seen corresponding path program 1 times [2021-12-16 08:48:47,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:48:47,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2124096768] [2021-12-16 08:48:47,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:48:47,762 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:48:47,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:48:47,764 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:48:47,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-16 08:48:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:48:47,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 08:48:47,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:48:47,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 08:48:47,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:48:47,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:48:47,949 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:48:47,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2124096768] [2021-12-16 08:48:47,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2124096768] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:48:47,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:48:47,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 08:48:47,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999624146] [2021-12-16 08:48:47,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:48:47,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:48:47,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:48:47,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:48:47,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:48:47,964 INFO L87 Difference]: Start difference. First operand 1635 states and 1729 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:48:50,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:48:50,042 INFO L93 Difference]: Finished difference Result 1891 states and 2028 transitions. [2021-12-16 08:48:50,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:48:50,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-12-16 08:48:50,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:48:50,047 INFO L225 Difference]: With dead ends: 1891 [2021-12-16 08:48:50,047 INFO L226 Difference]: Without dead ends: 1891 [2021-12-16 08:48:50,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:48:50,048 INFO L933 BasicCegarLoop]: 1168 mSDtfsCounter, 1369 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1380 SdHoareTripleChecker+Valid, 1533 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-16 08:48:50,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1380 Valid, 1533 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-16 08:48:50,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2021-12-16 08:48:50,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1620. [2021-12-16 08:48:50,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 880 states have (on average 1.9897727272727272) internal successors, (1751), 1611 states have internal predecessors, (1751), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-16 08:48:50,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 1773 transitions. [2021-12-16 08:48:50,074 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 1773 transitions. Word has length 5 [2021-12-16 08:48:50,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:48:50,075 INFO L470 AbstractCegarLoop]: Abstraction has 1620 states and 1773 transitions. [2021-12-16 08:48:50,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:48:50,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 1773 transitions. [2021-12-16 08:48:50,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-16 08:48:50,076 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:48:50,076 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-16 08:48:50,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-16 08:48:50,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:48:50,288 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 830 more)] === [2021-12-16 08:48:50,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:48:50,289 INFO L85 PathProgramCache]: Analyzing trace with hash 37287572, now seen corresponding path program 1 times [2021-12-16 08:48:50,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:48:50,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425854791] [2021-12-16 08:48:50,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:48:50,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:48:50,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:48:50,307 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:48:50,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-16 08:48:50,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:48:50,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 08:48:50,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:48:50,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 08:48:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:48:50,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:48:50,462 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:48:50,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425854791] [2021-12-16 08:48:50,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425854791] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:48:50,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:48:50,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 08:48:50,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521776329] [2021-12-16 08:48:50,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:48:50,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:48:50,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:48:50,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:48:50,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:48:50,466 INFO L87 Difference]: Start difference. First operand 1620 states and 1773 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:48:53,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:48:53,392 INFO L93 Difference]: Finished difference Result 2140 states and 2343 transitions. [2021-12-16 08:48:53,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:48:53,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-12-16 08:48:53,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:48:53,398 INFO L225 Difference]: With dead ends: 2140 [2021-12-16 08:48:53,398 INFO L226 Difference]: Without dead ends: 2140 [2021-12-16 08:48:53,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:48:53,398 INFO L933 BasicCegarLoop]: 1560 mSDtfsCounter, 741 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 2268 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-16 08:48:53,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 2268 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1066 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-16 08:48:53,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2021-12-16 08:48:53,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 1776. [2021-12-16 08:48:53,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1046 states have (on average 1.9665391969407267) internal successors, (2057), 1767 states have internal predecessors, (2057), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-16 08:48:53,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 2079 transitions. [2021-12-16 08:48:53,437 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 2079 transitions. Word has length 5 [2021-12-16 08:48:53,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:48:53,437 INFO L470 AbstractCegarLoop]: Abstraction has 1776 states and 2079 transitions. [2021-12-16 08:48:53,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:48:53,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 2079 transitions. [2021-12-16 08:48:53,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-16 08:48:53,437 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:48:53,438 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-16 08:48:53,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-16 08:48:53,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:48:53,644 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr640REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 830 more)] === [2021-12-16 08:48:53,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:48:53,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1157601995, now seen corresponding path program 1 times [2021-12-16 08:48:53,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:48:53,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [290961495] [2021-12-16 08:48:53,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:48:53,647 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:48:53,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:48:53,648 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:48:53,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-16 08:48:53,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:48:53,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 08:48:53,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:48:53,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:48:53,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:48:53,783 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:48:53,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [290961495] [2021-12-16 08:48:53,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [290961495] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:48:53,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:48:53,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:48:53,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668377203] [2021-12-16 08:48:53,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:48:53,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:48:53,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:48:53,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:48:53,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:48:53,788 INFO L87 Difference]: Start difference. First operand 1776 states and 2079 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:48:53,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:48:53,881 INFO L93 Difference]: Finished difference Result 3336 states and 3931 transitions. [2021-12-16 08:48:53,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:48:53,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-16 08:48:53,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:48:53,893 INFO L225 Difference]: With dead ends: 3336 [2021-12-16 08:48:53,894 INFO L226 Difference]: Without dead ends: 3336 [2021-12-16 08:48:53,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:48:53,896 INFO L933 BasicCegarLoop]: 1854 mSDtfsCounter, 1377 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1388 SdHoareTripleChecker+Valid, 3471 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 08:48:53,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1388 Valid, 3471 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 08:48:53,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-12-16 08:48:53,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 1778. [2021-12-16 08:48:53,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1048 states have (on average 1.9646946564885497) internal successors, (2059), 1769 states have internal predecessors, (2059), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-16 08:48:53,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 2081 transitions. [2021-12-16 08:48:53,939 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 2081 transitions. Word has length 6 [2021-12-16 08:48:53,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:48:53,939 INFO L470 AbstractCegarLoop]: Abstraction has 1778 states and 2081 transitions. [2021-12-16 08:48:53,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:48:53,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 2081 transitions. [2021-12-16 08:48:53,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 08:48:53,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:48:53,940 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:48:53,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-16 08:48:54,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:48:54,146 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 830 more)] === [2021-12-16 08:48:54,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:48:54,147 INFO L85 PathProgramCache]: Analyzing trace with hash 334651453, now seen corresponding path program 1 times [2021-12-16 08:48:54,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:48:54,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184016035] [2021-12-16 08:48:54,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:48:54,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:48:54,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:48:54,148 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:48:54,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-16 08:48:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:48:54,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 08:48:54,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:48:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:48:54,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:48:54,314 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:48:54,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184016035] [2021-12-16 08:48:54,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184016035] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:48:54,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:48:54,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:48:54,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063295456] [2021-12-16 08:48:54,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:48:54,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:48:54,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:48:54,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:48:54,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:48:54,317 INFO L87 Difference]: Start difference. First operand 1778 states and 2081 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:48:54,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:48:54,343 INFO L93 Difference]: Finished difference Result 1742 states and 2044 transitions. [2021-12-16 08:48:54,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:48:54,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-16 08:48:54,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:48:54,348 INFO L225 Difference]: With dead ends: 1742 [2021-12-16 08:48:54,348 INFO L226 Difference]: Without dead ends: 1742 [2021-12-16 08:48:54,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:48:54,349 INFO L933 BasicCegarLoop]: 1580 mSDtfsCounter, 1550 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1561 SdHoareTripleChecker+Valid, 1608 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 08:48:54,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1561 Valid, 1608 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 08:48:54,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2021-12-16 08:48:54,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1736. [2021-12-16 08:48:54,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1030 states have (on average 1.9572815533980583) internal successors, (2016), 1727 states have internal predecessors, (2016), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-16 08:48:54,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2038 transitions. [2021-12-16 08:48:54,378 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2038 transitions. Word has length 11 [2021-12-16 08:48:54,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:48:54,379 INFO L470 AbstractCegarLoop]: Abstraction has 1736 states and 2038 transitions. [2021-12-16 08:48:54,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:48:54,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2038 transitions. [2021-12-16 08:48:54,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 08:48:54,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:48:54,379 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:48:54,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-16 08:48:54,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:48:54,600 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 830 more)] === [2021-12-16 08:48:54,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:48:54,601 INFO L85 PathProgramCache]: Analyzing trace with hash -522505033, now seen corresponding path program 1 times [2021-12-16 08:48:54,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:48:54,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411746759] [2021-12-16 08:48:54,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:48:54,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:48:54,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:48:54,603 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:48:54,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-16 08:48:54,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:48:54,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 08:48:54,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:48:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:48:54,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:48:54,774 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:48:54,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411746759] [2021-12-16 08:48:54,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411746759] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:48:54,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:48:54,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 08:48:54,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844247899] [2021-12-16 08:48:54,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:48:54,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:48:54,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:48:54,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:48:54,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:48:54,776 INFO L87 Difference]: Start difference. First operand 1736 states and 2038 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:48:54,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:48:54,839 INFO L93 Difference]: Finished difference Result 1721 states and 2016 transitions. [2021-12-16 08:48:54,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:48:54,839 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-16 08:48:54,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:48:54,844 INFO L225 Difference]: With dead ends: 1721 [2021-12-16 08:48:54,844 INFO L226 Difference]: Without dead ends: 1721 [2021-12-16 08:48:54,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 08:48:54,845 INFO L933 BasicCegarLoop]: 1535 mSDtfsCounter, 1521 mSDsluCounter, 1556 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1532 SdHoareTripleChecker+Valid, 3091 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 08:48:54,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1532 Valid, 3091 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 08:48:54,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2021-12-16 08:48:54,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1714. [2021-12-16 08:48:54,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1022 states have (on average 1.9442270058708415) internal successors, (1987), 1705 states have internal predecessors, (1987), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-16 08:48:54,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 2009 transitions. [2021-12-16 08:48:54,868 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 2009 transitions. Word has length 13 [2021-12-16 08:48:54,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:48:54,869 INFO L470 AbstractCegarLoop]: Abstraction has 1714 states and 2009 transitions. [2021-12-16 08:48:54,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:48:54,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 2009 transitions. [2021-12-16 08:48:54,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 08:48:54,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:48:54,870 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:48:54,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-16 08:48:55,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:48:55,077 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 830 more)] === [2021-12-16 08:48:55,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:48:55,078 INFO L85 PathProgramCache]: Analyzing trace with hash -22216187, now seen corresponding path program 1 times [2021-12-16 08:48:55,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:48:55,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1093329606] [2021-12-16 08:48:55,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:48:55,079 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:48:55,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:48:55,080 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:48:55,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-16 08:48:55,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:48:55,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 08:48:55,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:48:55,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 08:48:55,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:48:55,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:48:55,295 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:48:55,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1093329606] [2021-12-16 08:48:55,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1093329606] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:48:55,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:48:55,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:48:55,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756408015] [2021-12-16 08:48:55,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:48:55,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:48:55,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:48:55,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:48:55,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:48:55,297 INFO L87 Difference]: Start difference. First operand 1714 states and 2009 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:48:58,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:48:58,276 INFO L93 Difference]: Finished difference Result 2759 states and 3092 transitions. [2021-12-16 08:48:58,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 08:48:58,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-16 08:48:58,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:48:58,283 INFO L225 Difference]: With dead ends: 2759 [2021-12-16 08:48:58,283 INFO L226 Difference]: Without dead ends: 2759 [2021-12-16 08:48:58,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 08:48:58,284 INFO L933 BasicCegarLoop]: 800 mSDtfsCounter, 3206 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 1708 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3214 SdHoareTripleChecker+Valid, 1886 SdHoareTripleChecker+Invalid, 1757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-16 08:48:58,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3214 Valid, 1886 Invalid, 1757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1708 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-16 08:48:58,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2759 states. [2021-12-16 08:48:58,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2759 to 1710. [2021-12-16 08:48:58,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1022 states have (on average 1.9403131115459882) internal successors, (1983), 1701 states have internal predecessors, (1983), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-16 08:48:58,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 2005 transitions. [2021-12-16 08:48:58,310 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 2005 transitions. Word has length 27 [2021-12-16 08:48:58,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:48:58,311 INFO L470 AbstractCegarLoop]: Abstraction has 1710 states and 2005 transitions. [2021-12-16 08:48:58,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:48:58,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 2005 transitions. [2021-12-16 08:48:58,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 08:48:58,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:48:58,312 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:48:58,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-16 08:48:58,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:48:58,528 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 830 more)] === [2021-12-16 08:48:58,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:48:58,529 INFO L85 PathProgramCache]: Analyzing trace with hash -22216186, now seen corresponding path program 1 times [2021-12-16 08:48:58,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:48:58,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [444823142] [2021-12-16 08:48:58,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:48:58,530 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:48:58,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:48:58,543 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:48:58,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-16 08:48:58,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:48:58,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 08:48:58,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:48:58,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 08:48:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:48:58,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:48:58,824 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:48:58,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [444823142] [2021-12-16 08:48:58,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [444823142] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:48:58,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:48:58,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:48:58,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38192109] [2021-12-16 08:48:58,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:48:58,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:48:58,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:48:58,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:48:58,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:48:58,825 INFO L87 Difference]: Start difference. First operand 1710 states and 2005 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:49:02,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:49:02,420 INFO L93 Difference]: Finished difference Result 2278 states and 2483 transitions. [2021-12-16 08:49:02,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 08:49:02,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-16 08:49:02,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:49:02,431 INFO L225 Difference]: With dead ends: 2278 [2021-12-16 08:49:02,432 INFO L226 Difference]: Without dead ends: 2278 [2021-12-16 08:49:02,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 08:49:02,432 INFO L933 BasicCegarLoop]: 1178 mSDtfsCounter, 1501 mSDsluCounter, 1425 mSDsCounter, 0 mSdLazyCounter, 1857 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1501 SdHoareTripleChecker+Valid, 2603 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-16 08:49:02,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1501 Valid, 2603 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1857 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-16 08:49:02,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2021-12-16 08:49:02,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 1706. [2021-12-16 08:49:02,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1706 states, 1022 states have (on average 1.936399217221135) internal successors, (1979), 1697 states have internal predecessors, (1979), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-16 08:49:02,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 2001 transitions. [2021-12-16 08:49:02,470 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 2001 transitions. Word has length 27 [2021-12-16 08:49:02,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:49:02,471 INFO L470 AbstractCegarLoop]: Abstraction has 1706 states and 2001 transitions. [2021-12-16 08:49:02,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:49:02,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 2001 transitions. [2021-12-16 08:49:02,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-16 08:49:02,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:49:02,472 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:49:02,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-16 08:49:02,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:49:02,679 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr108REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 830 more)] === [2021-12-16 08:49:02,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:49:02,679 INFO L85 PathProgramCache]: Analyzing trace with hash 810363537, now seen corresponding path program 1 times [2021-12-16 08:49:02,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:49:02,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [24556149] [2021-12-16 08:49:02,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:49:02,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:49:02,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:49:02,681 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:49:02,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-16 08:49:02,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:49:02,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 08:49:02,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:49:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:49:02,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:49:02,927 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:49:02,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [24556149] [2021-12-16 08:49:02,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [24556149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:49:02,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:49:02,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 08:49:02,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267107887] [2021-12-16 08:49:02,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:49:02,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:49:02,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:49:02,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:49:02,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:49:02,930 INFO L87 Difference]: Start difference. First operand 1706 states and 2001 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:49:02,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:49:02,964 INFO L93 Difference]: Finished difference Result 1706 states and 1997 transitions. [2021-12-16 08:49:02,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:49:02,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-16 08:49:02,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:49:02,970 INFO L225 Difference]: With dead ends: 1706 [2021-12-16 08:49:02,970 INFO L226 Difference]: Without dead ends: 1706 [2021-12-16 08:49:02,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 08:49:02,971 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 1497 mSDsluCounter, 1540 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1508 SdHoareTripleChecker+Valid, 3069 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 08:49:02,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1508 Valid, 3069 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 08:49:02,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2021-12-16 08:49:02,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1700. [2021-12-16 08:49:02,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1016 states have (on average 1.937992125984252) internal successors, (1969), 1691 states have internal predecessors, (1969), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-16 08:49:02,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 1991 transitions. [2021-12-16 08:49:02,994 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 1991 transitions. Word has length 42 [2021-12-16 08:49:02,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:49:02,995 INFO L470 AbstractCegarLoop]: Abstraction has 1700 states and 1991 transitions. [2021-12-16 08:49:02,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:49:02,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 1991 transitions. [2021-12-16 08:49:02,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-16 08:49:02,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:49:02,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:49:03,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-16 08:49:03,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:49:03,206 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr108REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 830 more)] === [2021-12-16 08:49:03,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:49:03,207 INFO L85 PathProgramCache]: Analyzing trace with hash 2087041861, now seen corresponding path program 1 times [2021-12-16 08:49:03,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:49:03,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757083703] [2021-12-16 08:49:03,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:49:03,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:49:03,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:49:03,210 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:49:03,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-16 08:49:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:49:03,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 08:49:03,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:49:03,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:49:03,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:49:03,654 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:49:03,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757083703] [2021-12-16 08:49:03,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757083703] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:49:03,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:49:03,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:49:03,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141133752] [2021-12-16 08:49:03,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:49:03,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:49:03,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:49:03,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:49:03,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:49:03,656 INFO L87 Difference]: Start difference. First operand 1700 states and 1991 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:49:03,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:49:03,817 INFO L93 Difference]: Finished difference Result 1941 states and 2241 transitions. [2021-12-16 08:49:03,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:49:03,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-12-16 08:49:03,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:49:03,823 INFO L225 Difference]: With dead ends: 1941 [2021-12-16 08:49:03,823 INFO L226 Difference]: Without dead ends: 1941 [2021-12-16 08:49:03,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:49:03,824 INFO L933 BasicCegarLoop]: 1608 mSDtfsCounter, 269 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 3012 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 08:49:03,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 3012 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 08:49:03,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2021-12-16 08:49:03,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 1746. [2021-12-16 08:49:03,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1062 states have (on average 1.8973634651600753) internal successors, (2015), 1737 states have internal predecessors, (2015), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-16 08:49:03,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 2037 transitions. [2021-12-16 08:49:03,845 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 2037 transitions. Word has length 50 [2021-12-16 08:49:03,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:49:03,846 INFO L470 AbstractCegarLoop]: Abstraction has 1746 states and 2037 transitions. [2021-12-16 08:49:03,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:49:03,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 2037 transitions. [2021-12-16 08:49:03,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-16 08:49:03,849 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:49:03,849 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:49:03,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-16 08:49:04,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:49:04,057 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 830 more)] === [2021-12-16 08:49:04,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:49:04,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1009990608, now seen corresponding path program 1 times [2021-12-16 08:49:04,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:49:04,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1361038421] [2021-12-16 08:49:04,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:49:04,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:49:04,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:49:04,059 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:49:04,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-16 08:49:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:49:04,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 08:49:04,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:49:04,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 08:49:04,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 08:49:04,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 08:49:04,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 08:49:04,795 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 08:49:04,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-16 08:49:04,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:49:04,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:49:04,809 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:49:04,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1361038421] [2021-12-16 08:49:04,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1361038421] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:49:04,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:49:04,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:49:04,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274938973] [2021-12-16 08:49:04,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:49:04,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:49:04,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:49:04,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:49:04,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:49:04,811 INFO L87 Difference]: Start difference. First operand 1746 states and 2037 transitions. Second operand has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:49:07,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:49:07,079 INFO L93 Difference]: Finished difference Result 1933 states and 2208 transitions. [2021-12-16 08:49:07,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:49:07,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-16 08:49:07,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:49:07,096 INFO L225 Difference]: With dead ends: 1933 [2021-12-16 08:49:07,097 INFO L226 Difference]: Without dead ends: 1933 [2021-12-16 08:49:07,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:49:07,097 INFO L933 BasicCegarLoop]: 631 mSDtfsCounter, 1569 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1585 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 1436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-16 08:49:07,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1585 Valid, 984 Invalid, 1436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1336 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-16 08:49:07,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2021-12-16 08:49:07,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1496. [2021-12-16 08:49:07,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 896 states have (on average 1.8013392857142858) internal successors, (1614), 1487 states have internal predecessors, (1614), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-16 08:49:07,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 1636 transitions. [2021-12-16 08:49:07,148 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 1636 transitions. Word has length 53 [2021-12-16 08:49:07,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:49:07,148 INFO L470 AbstractCegarLoop]: Abstraction has 1496 states and 1636 transitions. [2021-12-16 08:49:07,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:49:07,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 1636 transitions. [2021-12-16 08:49:07,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-16 08:49:07,150 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:49:07,150 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:49:07,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-16 08:49:07,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:49:07,359 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr66REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 830 more)] === [2021-12-16 08:49:07,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:49:07,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1993678057, now seen corresponding path program 1 times [2021-12-16 08:49:07,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:49:07,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042908410] [2021-12-16 08:49:07,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:49:07,360 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:49:07,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:49:07,362 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:49:07,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-16 08:49:07,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:49:07,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 08:49:07,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:49:07,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 08:49:07,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 08:49:07,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-12-16 08:49:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:49:07,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:49:07,704 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:49:07,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042908410] [2021-12-16 08:49:07,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042908410] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:49:07,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:49:07,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 08:49:07,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388545130] [2021-12-16 08:49:07,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:49:07,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 08:49:07,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:49:07,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 08:49:07,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 08:49:07,706 INFO L87 Difference]: Start difference. First operand 1496 states and 1636 transitions. Second operand has 5 states, 4 states have (on average 14.5) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:49:10,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:49:10,092 INFO L93 Difference]: Finished difference Result 1495 states and 1635 transitions. [2021-12-16 08:49:10,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 08:49:10,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.5) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-16 08:49:10,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:49:10,096 INFO L225 Difference]: With dead ends: 1495 [2021-12-16 08:49:10,096 INFO L226 Difference]: Without dead ends: 1495 [2021-12-16 08:49:10,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-16 08:49:10,097 INFO L933 BasicCegarLoop]: 1449 mSDtfsCounter, 4 mSDsluCounter, 2255 mSDsCounter, 0 mSdLazyCounter, 2097 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3704 SdHoareTripleChecker+Invalid, 2098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-16 08:49:10,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 3704 Invalid, 2098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2097 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-16 08:49:10,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1495 states. [2021-12-16 08:49:10,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1495 to 1495. [2021-12-16 08:49:10,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 896 states have (on average 1.8002232142857142) internal successors, (1613), 1486 states have internal predecessors, (1613), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-16 08:49:10,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 1635 transitions. [2021-12-16 08:49:10,110 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 1635 transitions. Word has length 58 [2021-12-16 08:49:10,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:49:10,110 INFO L470 AbstractCegarLoop]: Abstraction has 1495 states and 1635 transitions. [2021-12-16 08:49:10,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.5) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:49:10,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 1635 transitions. [2021-12-16 08:49:10,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-16 08:49:10,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:49:10,111 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:49:10,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-16 08:49:10,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:49:10,331 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr67REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 830 more)] === [2021-12-16 08:49:10,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:49:10,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1993678056, now seen corresponding path program 1 times [2021-12-16 08:49:10,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:49:10,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2038258055] [2021-12-16 08:49:10,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:49:10,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:49:10,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:49:10,333 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:49:10,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-16 08:49:10,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:49:10,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 08:49:10,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:49:10,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 08:49:10,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 08:49:10,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 08:49:10,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-12-16 08:49:10,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 08:49:10,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:49:10,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:49:10,691 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:49:10,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2038258055] [2021-12-16 08:49:10,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2038258055] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:49:10,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:49:10,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 08:49:10,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647151797] [2021-12-16 08:49:10,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:49:10,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 08:49:10,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:49:10,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 08:49:10,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 08:49:10,693 INFO L87 Difference]: Start difference. First operand 1495 states and 1635 transitions. Second operand has 5 states, 4 states have (on average 14.5) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:49:14,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:49:14,114 INFO L93 Difference]: Finished difference Result 1494 states and 1634 transitions. [2021-12-16 08:49:14,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 08:49:14,115 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.5) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-16 08:49:14,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:49:14,118 INFO L225 Difference]: With dead ends: 1494 [2021-12-16 08:49:14,118 INFO L226 Difference]: Without dead ends: 1494 [2021-12-16 08:49:14,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-16 08:49:14,118 INFO L933 BasicCegarLoop]: 1449 mSDtfsCounter, 2 mSDsluCounter, 2301 mSDsCounter, 0 mSdLazyCounter, 2049 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3750 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-16 08:49:14,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3750 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2049 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-16 08:49:14,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2021-12-16 08:49:14,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1494. [2021-12-16 08:49:14,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 895 states have (on average 1.8011173184357543) internal successors, (1612), 1485 states have internal predecessors, (1612), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-16 08:49:14,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 1634 transitions. [2021-12-16 08:49:14,135 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 1634 transitions. Word has length 58 [2021-12-16 08:49:14,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:49:14,136 INFO L470 AbstractCegarLoop]: Abstraction has 1494 states and 1634 transitions. [2021-12-16 08:49:14,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.5) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:49:14,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 1634 transitions. [2021-12-16 08:49:14,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-16 08:49:14,136 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:49:14,137 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:49:14,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-16 08:49:14,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:49:14,346 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 830 more)] === [2021-12-16 08:49:14,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:49:14,346 INFO L85 PathProgramCache]: Analyzing trace with hash 2015085822, now seen corresponding path program 1 times [2021-12-16 08:49:14,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:49:14,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469096404] [2021-12-16 08:49:14,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:49:14,347 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:49:14,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:49:14,348 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:49:14,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-16 08:49:14,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:49:14,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 08:49:14,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:49:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:49:14,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:49:14,699 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:49:14,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469096404] [2021-12-16 08:49:14,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469096404] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:49:14,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:49:14,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 08:49:14,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853583124] [2021-12-16 08:49:14,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:49:14,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:49:14,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:49:14,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:49:14,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:49:14,707 INFO L87 Difference]: Start difference. First operand 1494 states and 1634 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 08:49:14,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:49:14,778 INFO L93 Difference]: Finished difference Result 1497 states and 1639 transitions. [2021-12-16 08:49:14,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:49:14,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-12-16 08:49:14,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:49:14,788 INFO L225 Difference]: With dead ends: 1497 [2021-12-16 08:49:14,788 INFO L226 Difference]: Without dead ends: 1497 [2021-12-16 08:49:14,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 08:49:14,789 INFO L933 BasicCegarLoop]: 1448 mSDtfsCounter, 2 mSDsluCounter, 2888 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4336 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 08:49:14,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4336 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 08:49:14,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-12-16 08:49:14,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1497. [2021-12-16 08:49:14,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 897 states have (on average 1.8004459308807135) internal successors, (1615), 1488 states have internal predecessors, (1615), 11 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (13), 7 states have call predecessors, (13), 11 states have call successors, (13) [2021-12-16 08:49:14,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 1639 transitions. [2021-12-16 08:49:14,810 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 1639 transitions. Word has length 66 [2021-12-16 08:49:14,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:49:14,810 INFO L470 AbstractCegarLoop]: Abstraction has 1497 states and 1639 transitions. [2021-12-16 08:49:14,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 08:49:14,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 1639 transitions. [2021-12-16 08:49:14,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-16 08:49:14,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:49:14,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:49:14,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-16 08:49:15,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:49:15,020 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 830 more)] === [2021-12-16 08:49:15,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:49:15,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1745990217, now seen corresponding path program 1 times [2021-12-16 08:49:15,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:49:15,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1292717016] [2021-12-16 08:49:15,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:49:15,022 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:49:15,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:49:15,022 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:49:15,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-16 08:49:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:49:15,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 08:49:15,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:49:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:49:15,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 08:49:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:49:15,489 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:49:15,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1292717016] [2021-12-16 08:49:15,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1292717016] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 08:49:15,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 08:49:15,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-16 08:49:15,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887470049] [2021-12-16 08:49:15,490 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 08:49:15,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 08:49:15,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:49:15,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 08:49:15,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-16 08:49:15,491 INFO L87 Difference]: Start difference. First operand 1497 states and 1639 transitions. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:49:15,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:49:15,641 INFO L93 Difference]: Finished difference Result 1509 states and 1657 transitions. [2021-12-16 08:49:15,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 08:49:15,641 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 67 [2021-12-16 08:49:15,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:49:15,644 INFO L225 Difference]: With dead ends: 1509 [2021-12-16 08:49:15,644 INFO L226 Difference]: Without dead ends: 1509 [2021-12-16 08:49:15,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-12-16 08:49:15,645 INFO L933 BasicCegarLoop]: 1448 mSDtfsCounter, 20 mSDsluCounter, 4327 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 5775 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 08:49:15,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 5775 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 08:49:15,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-12-16 08:49:15,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1507. [2021-12-16 08:49:15,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 906 states have (on average 1.7991169977924946) internal successors, (1630), 1497 states have internal predecessors, (1630), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (13), 7 states have call predecessors, (13), 11 states have call successors, (13) [2021-12-16 08:49:15,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 1654 transitions. [2021-12-16 08:49:15,659 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 1654 transitions. Word has length 67 [2021-12-16 08:49:15,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:49:15,659 INFO L470 AbstractCegarLoop]: Abstraction has 1507 states and 1654 transitions. [2021-12-16 08:49:15,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:49:15,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 1654 transitions. [2021-12-16 08:49:15,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-16 08:49:15,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:49:15,660 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:49:15,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-16 08:49:15,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:49:15,870 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 830 more)] === [2021-12-16 08:49:15,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:49:15,870 INFO L85 PathProgramCache]: Analyzing trace with hash 483699518, now seen corresponding path program 2 times [2021-12-16 08:49:15,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:49:15,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959844773] [2021-12-16 08:49:15,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 08:49:15,871 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:49:15,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:49:15,880 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:49:15,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-16 08:49:16,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 08:49:16,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 08:49:16,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 08:49:16,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:49:16,394 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:49:16,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 08:49:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:49:16,579 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:49:16,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959844773] [2021-12-16 08:49:16,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959844773] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 08:49:16,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 08:49:16,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-16 08:49:16,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115940340] [2021-12-16 08:49:16,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 08:49:16,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 08:49:16,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:49:16,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 08:49:16,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-12-16 08:49:16,580 INFO L87 Difference]: Start difference. First operand 1507 states and 1654 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:49:17,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:49:17,189 INFO L93 Difference]: Finished difference Result 1528 states and 1686 transitions. [2021-12-16 08:49:17,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-16 08:49:17,191 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 70 [2021-12-16 08:49:17,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:49:17,194 INFO L225 Difference]: With dead ends: 1528 [2021-12-16 08:49:17,194 INFO L226 Difference]: Without dead ends: 1524 [2021-12-16 08:49:17,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-12-16 08:49:17,195 INFO L933 BasicCegarLoop]: 1451 mSDtfsCounter, 43 mSDsluCounter, 12993 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 14444 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 08:49:17,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 14444 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 08:49:17,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2021-12-16 08:49:17,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1516. [2021-12-16 08:49:17,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 915 states have (on average 1.794535519125683) internal successors, (1642), 1506 states have internal predecessors, (1642), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (13), 7 states have call predecessors, (13), 11 states have call successors, (13) [2021-12-16 08:49:17,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 1666 transitions. [2021-12-16 08:49:17,231 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 1666 transitions. Word has length 70 [2021-12-16 08:49:17,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:49:17,231 INFO L470 AbstractCegarLoop]: Abstraction has 1516 states and 1666 transitions. [2021-12-16 08:49:17,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:49:17,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 1666 transitions. [2021-12-16 08:49:17,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-16 08:49:17,236 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:49:17,236 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:49:17,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-16 08:49:17,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:49:17,446 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 830 more)] === [2021-12-16 08:49:17,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:49:17,447 INFO L85 PathProgramCache]: Analyzing trace with hash 436758686, now seen corresponding path program 3 times [2021-12-16 08:49:17,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:49:17,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715539924] [2021-12-16 08:49:17,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 08:49:17,448 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:49:17,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:49:17,449 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:49:17,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-16 08:49:18,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-16 08:49:18,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 08:49:18,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 08:49:18,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:49:18,270 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:49:18,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 08:49:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:49:18,858 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:49:18,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715539924] [2021-12-16 08:49:18,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715539924] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 08:49:18,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 08:49:18,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-12-16 08:49:18,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928695747] [2021-12-16 08:49:18,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 08:49:18,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-16 08:49:18,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:49:18,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-16 08:49:18,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-12-16 08:49:18,859 INFO L87 Difference]: Start difference. First operand 1516 states and 1666 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:49:21,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:49:21,587 INFO L93 Difference]: Finished difference Result 1558 states and 1742 transitions. [2021-12-16 08:49:21,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-16 08:49:21,587 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 76 [2021-12-16 08:49:21,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:49:21,590 INFO L225 Difference]: With dead ends: 1558 [2021-12-16 08:49:21,590 INFO L226 Difference]: Without dead ends: 1552 [2021-12-16 08:49:21,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=793, Invalid=1559, Unknown=0, NotChecked=0, Total=2352 [2021-12-16 08:49:21,592 INFO L933 BasicCegarLoop]: 1455 mSDtfsCounter, 138 mSDsluCounter, 17387 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 18842 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-16 08:49:21,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 18842 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-16 08:49:21,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2021-12-16 08:49:21,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1534. [2021-12-16 08:49:21,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 933 states have (on average 1.7845659163987138) internal successors, (1665), 1524 states have internal predecessors, (1665), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (13), 7 states have call predecessors, (13), 11 states have call successors, (13) [2021-12-16 08:49:21,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 1689 transitions. [2021-12-16 08:49:21,630 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 1689 transitions. Word has length 76 [2021-12-16 08:49:21,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:49:21,630 INFO L470 AbstractCegarLoop]: Abstraction has 1534 states and 1689 transitions. [2021-12-16 08:49:21,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:49:21,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 1689 transitions. [2021-12-16 08:49:21,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-16 08:49:21,631 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:49:21,631 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:49:21,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-16 08:49:21,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:49:21,842 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 830 more)] === [2021-12-16 08:49:21,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:49:21,843 INFO L85 PathProgramCache]: Analyzing trace with hash -357348514, now seen corresponding path program 4 times [2021-12-16 08:49:21,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:49:21,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [912461902] [2021-12-16 08:49:21,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 08:49:21,844 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:49:21,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:49:21,845 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:49:21,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-16 08:49:22,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 08:49:22,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 08:49:22,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-16 08:49:22,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:49:22,511 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:49:22,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 08:49:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:49:23,615 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:49:23,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [912461902] [2021-12-16 08:49:23,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [912461902] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 08:49:23,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 08:49:23,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-16 08:49:23,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255490063] [2021-12-16 08:49:23,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 08:49:23,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-16 08:49:23,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:49:23,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-16 08:49:23,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=1778, Unknown=0, NotChecked=0, Total=2450 [2021-12-16 08:49:23,620 INFO L87 Difference]: Start difference. First operand 1534 states and 1689 transitions. Second operand has 50 states, 50 states have (on average 2.22) internal successors, (111), 50 states have internal predecessors, (111), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:49:34,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:49:34,951 INFO L93 Difference]: Finished difference Result 1614 states and 1822 transitions. [2021-12-16 08:49:34,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-12-16 08:49:34,952 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.22) internal successors, (111), 50 states have internal predecessors, (111), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 88 [2021-12-16 08:49:34,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:49:34,972 INFO L225 Difference]: With dead ends: 1614 [2021-12-16 08:49:34,972 INFO L226 Difference]: Without dead ends: 1610 [2021-12-16 08:49:34,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=3791, Invalid=9319, Unknown=0, NotChecked=0, Total=13110 [2021-12-16 08:49:34,975 INFO L933 BasicCegarLoop]: 1468 mSDtfsCounter, 409 mSDsluCounter, 39413 mSDsCounter, 0 mSdLazyCounter, 3178 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 40881 SdHoareTripleChecker+Invalid, 3624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 3178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-16 08:49:34,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 40881 Invalid, 3624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 3178 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-16 08:49:34,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2021-12-16 08:49:35,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1568. [2021-12-16 08:49:35,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 967 states have (on average 1.7693898655635987) internal successors, (1711), 1558 states have internal predecessors, (1711), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (13), 7 states have call predecessors, (13), 11 states have call successors, (13) [2021-12-16 08:49:35,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 1735 transitions. [2021-12-16 08:49:35,009 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 1735 transitions. Word has length 88 [2021-12-16 08:49:35,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:49:35,010 INFO L470 AbstractCegarLoop]: Abstraction has 1568 states and 1735 transitions. [2021-12-16 08:49:35,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.22) internal successors, (111), 50 states have internal predecessors, (111), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:49:35,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 1735 transitions. [2021-12-16 08:49:35,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-16 08:49:35,011 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:49:35,011 INFO L514 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:49:35,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-16 08:49:35,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:49:35,222 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 830 more)] === [2021-12-16 08:49:35,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:49:35,222 INFO L85 PathProgramCache]: Analyzing trace with hash 182176190, now seen corresponding path program 5 times [2021-12-16 08:49:35,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:49:35,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902492876] [2021-12-16 08:49:35,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 08:49:35,223 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:49:35,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:49:35,224 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:49:35,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-16 08:49:36,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-12-16 08:49:36,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 08:49:36,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-16 08:49:36,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:49:36,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 08:49:36,617 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-16 08:49:36,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-16 08:49:36,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 08:49:36,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-16 08:49:37,058 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| (_ BitVec 32)) (v_arrayElimCell_9 (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1|))) (_ bv1 1))) (not (= |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| v_arrayElimCell_9)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| v_arrayElimCell_9)) (_ bv1 1))))) (exists ((v_ArrVal_1606 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1606)))) is different from true [2021-12-16 08:49:37,116 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| (_ BitVec 32)) (v_arrayElimCell_9 (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1|))) (_ bv1 1))) (not (= |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| v_arrayElimCell_9)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| v_arrayElimCell_9)) (_ bv1 1))))) (exists ((v_ArrVal_1608 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1608)))) is different from true [2021-12-16 08:49:37,635 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| (_ BitVec 32)) (v_arrayElimCell_9 (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1|))) (_ bv1 1))) (not (= |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| v_arrayElimCell_9)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| v_arrayElimCell_9)) (_ bv1 1))))) (exists ((v_ArrVal_1623 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1623)))) is different from true [2021-12-16 08:49:37,690 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| (_ BitVec 32)) (v_arrayElimCell_9 (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1|))) (_ bv1 1))) (not (= |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| v_arrayElimCell_9)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| v_arrayElimCell_9)) (_ bv1 1))))) (exists ((v_ArrVal_1625 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1625)))) is different from true [2021-12-16 08:49:38,141 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| (_ BitVec 32)) (v_arrayElimCell_9 (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1|))) (_ bv1 1))) (not (= |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| v_arrayElimCell_9)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| v_arrayElimCell_9)) (_ bv1 1))))) (exists ((v_ArrVal_1639 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1639)))) is different from true [2021-12-16 08:49:38,332 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 08:49:38,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2021-12-16 08:49:38,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-12-16 08:49:38,409 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 741 trivial. 210 not checked. [2021-12-16 08:49:38,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 08:49:38,644 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1689 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem33#1.base| v_ArrVal_1689) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd |c_ULTIMATE.start_main_~user~0#1.offset| (_ bv8 32)))) (_ bv1 1)))) is different from false [2021-12-16 08:49:38,646 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:49:38,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902492876] [2021-12-16 08:49:38,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902492876] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 08:49:38,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1905450330] [2021-12-16 08:49:38,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 08:49:38,647 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-16 08:49:38,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-16 08:49:38,648 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-16 08:49:38,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process