./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 143a30a80a62e6cad7506820b1f96be933051e37975b620c656decb608437802 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 18:10:27,062 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 18:10:27,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 18:10:27,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 18:10:27,112 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 18:10:27,115 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 18:10:27,116 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 18:10:27,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 18:10:27,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 18:10:27,125 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 18:10:27,126 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 18:10:27,126 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 18:10:27,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 18:10:27,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 18:10:27,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 18:10:27,130 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 18:10:27,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 18:10:27,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 18:10:27,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 18:10:27,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 18:10:27,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 18:10:27,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 18:10:27,143 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 18:10:27,144 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 18:10:27,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 18:10:27,147 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 18:10:27,147 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 18:10:27,148 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 18:10:27,149 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 18:10:27,149 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 18:10:27,149 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 18:10:27,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 18:10:27,150 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 18:10:27,151 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 18:10:27,151 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 18:10:27,152 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 18:10:27,152 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 18:10:27,152 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 18:10:27,152 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 18:10:27,153 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 18:10:27,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 18:10:27,154 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-21 18:10:27,169 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 18:10:27,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 18:10:27,170 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 18:10:27,170 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 18:10:27,170 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 18:10:27,170 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 18:10:27,171 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 18:10:27,171 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 18:10:27,171 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 18:10:27,171 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 18:10:27,172 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 18:10:27,172 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 18:10:27,172 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 18:10:27,172 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 18:10:27,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 18:10:27,172 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 18:10:27,173 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 18:10:27,173 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 18:10:27,173 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 18:10:27,173 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 18:10:27,173 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 18:10:27,173 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 18:10:27,173 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 18:10:27,174 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 18:10:27,174 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 18:10:27,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:10:27,174 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 18:10:27,174 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 18:10:27,174 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 18:10:27,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 18:10:27,175 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 18:10:27,175 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 143a30a80a62e6cad7506820b1f96be933051e37975b620c656decb608437802 [2021-12-21 18:10:27,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 18:10:27,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 18:10:27,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 18:10:27,367 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 18:10:27,367 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 18:10:27,368 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i [2021-12-21 18:10:27,431 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e387d8857/1df532b4cc304989b9c2fc63c14eaf1e/FLAG0a094a09c [2021-12-21 18:10:27,800 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 18:10:27,801 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i [2021-12-21 18:10:27,822 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e387d8857/1df532b4cc304989b9c2fc63c14eaf1e/FLAG0a094a09c [2021-12-21 18:10:28,189 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e387d8857/1df532b4cc304989b9c2fc63c14eaf1e [2021-12-21 18:10:28,191 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 18:10:28,192 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 18:10:28,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 18:10:28,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 18:10:28,205 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 18:10:28,206 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:10:28" (1/1) ... [2021-12-21 18:10:28,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d3dcda9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:28, skipping insertion in model container [2021-12-21 18:10:28,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:10:28" (1/1) ... [2021-12-21 18:10:28,213 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 18:10:28,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 18:10:28,459 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:10:28,475 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-21 18:10:28,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6c5bc729 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:28, skipping insertion in model container [2021-12-21 18:10:28,476 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 18:10:28,476 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-21 18:10:28,478 INFO L158 Benchmark]: Toolchain (without parser) took 284.80ms. Allocated memory was 86.0MB in the beginning and 123.7MB in the end (delta: 37.7MB). Free memory was 52.1MB in the beginning and 95.1MB in the end (delta: -43.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-21 18:10:28,479 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 86.0MB. Free memory is still 42.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 18:10:28,480 INFO L158 Benchmark]: CACSL2BoogieTranslator took 273.71ms. Allocated memory was 86.0MB in the beginning and 123.7MB in the end (delta: 37.7MB). Free memory was 51.9MB in the beginning and 95.1MB in the end (delta: -43.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-21 18:10:28,481 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 86.0MB. Free memory is still 42.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 273.71ms. Allocated memory was 86.0MB in the beginning and 123.7MB in the end (delta: 37.7MB). Free memory was 51.9MB in the beginning and 95.1MB in the end (delta: -43.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: 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/ldv-memsafety/memleaks_test17_2-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 143a30a80a62e6cad7506820b1f96be933051e37975b620c656decb608437802 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 18:10:29,899 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 18:10:29,901 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 18:10:29,926 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 18:10:29,928 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 18:10:29,930 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 18:10:29,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 18:10:29,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 18:10:29,937 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 18:10:29,940 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 18:10:29,941 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 18:10:29,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 18:10:29,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 18:10:29,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 18:10:29,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 18:10:29,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 18:10:29,948 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 18:10:29,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 18:10:29,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 18:10:29,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 18:10:29,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 18:10:29,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 18:10:29,959 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 18:10:29,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 18:10:29,965 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 18:10:29,965 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 18:10:29,965 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 18:10:29,966 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 18:10:29,966 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 18:10:29,967 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 18:10:29,967 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 18:10:29,968 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 18:10:29,969 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 18:10:29,969 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 18:10:29,970 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 18:10:29,970 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 18:10:29,971 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 18:10:29,971 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 18:10:29,971 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 18:10:29,972 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 18:10:29,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 18:10:29,975 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-21 18:10:29,999 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 18:10:30,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 18:10:30,002 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 18:10:30,002 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 18:10:30,002 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 18:10:30,002 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 18:10:30,003 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 18:10:30,004 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 18:10:30,004 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 18:10:30,004 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 18:10:30,004 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 18:10:30,005 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 18:10:30,005 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 18:10:30,005 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 18:10:30,005 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 18:10:30,005 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 18:10:30,005 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 18:10:30,005 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 18:10:30,006 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 18:10:30,006 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 18:10:30,006 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-21 18:10:30,006 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-21 18:10:30,006 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 18:10:30,006 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 18:10:30,006 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 18:10:30,007 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 18:10:30,007 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 18:10:30,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:10:30,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 18:10:30,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 18:10:30,014 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-21 18:10:30,014 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-21 18:10:30,014 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 18:10:30,015 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-21 18:10:30,015 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 143a30a80a62e6cad7506820b1f96be933051e37975b620c656decb608437802 [2021-12-21 18:10:30,263 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 18:10:30,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 18:10:30,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 18:10:30,285 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 18:10:30,285 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 18:10:30,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i [2021-12-21 18:10:30,334 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b6e04a62/ee10a15cffcc4b7e997769465f9b55b3/FLAGa89c4438d [2021-12-21 18:10:30,825 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 18:10:30,826 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i [2021-12-21 18:10:30,843 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b6e04a62/ee10a15cffcc4b7e997769465f9b55b3/FLAGa89c4438d [2021-12-21 18:10:30,856 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b6e04a62/ee10a15cffcc4b7e997769465f9b55b3 [2021-12-21 18:10:30,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 18:10:30,860 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 18:10:30,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 18:10:30,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 18:10:30,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 18:10:30,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:10:30" (1/1) ... [2021-12-21 18:10:30,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2819c0c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:30, skipping insertion in model container [2021-12-21 18:10:30,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:10:30" (1/1) ... [2021-12-21 18:10:30,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 18:10:30,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 18:10:31,224 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:10:31,240 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-21 18:10:31,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 18:10:31,285 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:10:31,292 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 18:10:31,347 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:10:31,399 INFO L208 MainTranslator]: Completed translation [2021-12-21 18:10:31,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:31 WrapperNode [2021-12-21 18:10:31,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 18:10:31,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 18:10:31,403 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 18:10:31,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 18:10:31,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:31" (1/1) ... [2021-12-21 18:10:31,421 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:31" (1/1) ... [2021-12-21 18:10:31,440 INFO L137 Inliner]: procedures = 167, calls = 78, calls flagged for inlining = 23, calls inlined = 5, statements flattened = 86 [2021-12-21 18:10:31,441 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 18:10:31,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 18:10:31,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 18:10:31,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 18:10:31,446 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:31" (1/1) ... [2021-12-21 18:10:31,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:31" (1/1) ... [2021-12-21 18:10:31,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:31" (1/1) ... [2021-12-21 18:10:31,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:31" (1/1) ... [2021-12-21 18:10:31,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:31" (1/1) ... [2021-12-21 18:10:31,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:31" (1/1) ... [2021-12-21 18:10:31,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:31" (1/1) ... [2021-12-21 18:10:31,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 18:10:31,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 18:10:31,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 18:10:31,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 18:10:31,464 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:31" (1/1) ... [2021-12-21 18:10:31,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:10:31,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:10:31,484 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 18:10:31,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 18:10:31,509 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-21 18:10:31,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-21 18:10:31,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 18:10:31,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 18:10:31,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 18:10:31,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 18:10:31,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 18:10:31,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 18:10:31,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 18:10:31,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 18:10:31,585 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 18:10:31,586 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 18:10:31,842 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 18:10:31,846 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 18:10:31,846 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-21 18:10:31,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:10:31 BoogieIcfgContainer [2021-12-21 18:10:31,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 18:10:31,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 18:10:31,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 18:10:31,851 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 18:10:31,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 06:10:30" (1/3) ... [2021-12-21 18:10:31,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75cb6245 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:10:31, skipping insertion in model container [2021-12-21 18:10:31,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:31" (2/3) ... [2021-12-21 18:10:31,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75cb6245 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:10:31, skipping insertion in model container [2021-12-21 18:10:31,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:10:31" (3/3) ... [2021-12-21 18:10:31,853 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test17_2-1.i [2021-12-21 18:10:31,857 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 18:10:31,857 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2021-12-21 18:10:31,897 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 18:10:31,902 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 18:10:31,902 INFO L340 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2021-12-21 18:10:31,912 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 38 states have (on average 1.763157894736842) internal successors, (67), 56 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:10:31,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 18:10:31,917 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:31,918 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:31,918 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-12-21 18:10:31,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:31,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1738627285, now seen corresponding path program 1 times [2021-12-21 18:10:31,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:31,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [995261850] [2021-12-21 18:10:31,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:10:31,932 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:31,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:31,934 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:10:31,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-21 18:10:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:10:31,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 18:10:32,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:32,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:10:32,055 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:10:32,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [995261850] [2021-12-21 18:10:32,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [995261850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:10:32,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:10:32,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:10:32,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324323401] [2021-12-21 18:10:32,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:10:32,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:10:32,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:10:32,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:10:32,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:10:32,078 INFO L87 Difference]: Start difference. First operand has 60 states, 38 states have (on average 1.763157894736842) internal successors, (67), 56 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:32,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:10:32,189 INFO L93 Difference]: Finished difference Result 114 states and 129 transitions. [2021-12-21 18:10:32,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:10:32,192 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-12-21 18:10:32,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:10:32,198 INFO L225 Difference]: With dead ends: 114 [2021-12-21 18:10:32,198 INFO L226 Difference]: Without dead ends: 110 [2021-12-21 18:10:32,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:10:32,206 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 55 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:10:32,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 234 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:10:32,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-21 18:10:32,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 62. [2021-12-21 18:10:32,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 40 states have (on average 1.6) internal successors, (64), 57 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 18:10:32,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2021-12-21 18:10:32,243 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 11 [2021-12-21 18:10:32,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:10:32,244 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2021-12-21 18:10:32,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:32,244 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2021-12-21 18:10:32,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 18:10:32,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:32,246 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:32,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-21 18:10:32,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:10:32,453 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-12-21 18:10:32,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:32,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1738628211, now seen corresponding path program 1 times [2021-12-21 18:10:32,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:32,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2117765659] [2021-12-21 18:10:32,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:10:32,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:32,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:32,457 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:10:32,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-21 18:10:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:10:32,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 18:10:32,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:32,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:10:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:32,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:10:32,572 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:10:32,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2117765659] [2021-12-21 18:10:32,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2117765659] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:10:32,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:10:32,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:10:32,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913657712] [2021-12-21 18:10:32,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:10:32,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:10:32,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:10:32,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:10:32,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:10:32,576 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:32,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:10:32,711 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2021-12-21 18:10:32,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:10:32,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-12-21 18:10:32,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:10:32,713 INFO L225 Difference]: With dead ends: 97 [2021-12-21 18:10:32,713 INFO L226 Difference]: Without dead ends: 97 [2021-12-21 18:10:32,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:10:32,714 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 35 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:10:32,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 158 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:10:32,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-21 18:10:32,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 75. [2021-12-21 18:10:32,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 53 states have (on average 1.5849056603773586) internal successors, (84), 70 states have internal predecessors, (84), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 18:10:32,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2021-12-21 18:10:32,724 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 11 [2021-12-21 18:10:32,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:10:32,725 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2021-12-21 18:10:32,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:32,725 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2021-12-21 18:10:32,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 18:10:32,726 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:32,726 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:32,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-21 18:10:32,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:10:32,927 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-12-21 18:10:32,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:32,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1738628210, now seen corresponding path program 1 times [2021-12-21 18:10:32,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:32,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295683713] [2021-12-21 18:10:32,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:10:32,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:32,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:32,929 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:10:32,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-21 18:10:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:10:32,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 18:10:32,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:32,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:10:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:33,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:10:33,085 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:10:33,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [295683713] [2021-12-21 18:10:33,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [295683713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:10:33,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:10:33,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 18:10:33,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595220436] [2021-12-21 18:10:33,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:10:33,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:10:33,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:10:33,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:10:33,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:10:33,087 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:33,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:10:33,328 INFO L93 Difference]: Finished difference Result 127 states and 150 transitions. [2021-12-21 18:10:33,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 18:10:33,328 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-12-21 18:10:33,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:10:33,329 INFO L225 Difference]: With dead ends: 127 [2021-12-21 18:10:33,329 INFO L226 Difference]: Without dead ends: 127 [2021-12-21 18:10:33,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-12-21 18:10:33,330 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 109 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:10:33,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 371 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:10:33,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-21 18:10:33,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 105. [2021-12-21 18:10:33,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 83 states have (on average 1.5783132530120483) internal successors, (131), 100 states have internal predecessors, (131), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 18:10:33,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 137 transitions. [2021-12-21 18:10:33,337 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 137 transitions. Word has length 11 [2021-12-21 18:10:33,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:10:33,337 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 137 transitions. [2021-12-21 18:10:33,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:33,337 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 137 transitions. [2021-12-21 18:10:33,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 18:10:33,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:33,337 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:33,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-21 18:10:33,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:10:33,544 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-12-21 18:10:33,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:33,545 INFO L85 PathProgramCache]: Analyzing trace with hash -851123604, now seen corresponding path program 1 times [2021-12-21 18:10:33,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:33,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [681000745] [2021-12-21 18:10:33,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:10:33,545 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:33,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:33,546 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:10:33,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-21 18:10:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:10:33,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 18:10:33,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:33,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:33,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:10:33,608 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:10:33,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [681000745] [2021-12-21 18:10:33,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [681000745] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:10:33,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:10:33,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:10:33,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270661939] [2021-12-21 18:10:33,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:10:33,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:10:33,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:10:33,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:10:33,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:10:33,610 INFO L87 Difference]: Start difference. First operand 105 states and 137 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:33,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:10:33,694 INFO L93 Difference]: Finished difference Result 148 states and 185 transitions. [2021-12-21 18:10:33,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:10:33,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-12-21 18:10:33,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:10:33,695 INFO L225 Difference]: With dead ends: 148 [2021-12-21 18:10:33,695 INFO L226 Difference]: Without dead ends: 146 [2021-12-21 18:10:33,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:10:33,696 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 46 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:10:33,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 162 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:10:33,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-21 18:10:33,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 105. [2021-12-21 18:10:33,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 83 states have (on average 1.5662650602409638) internal successors, (130), 100 states have internal predecessors, (130), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 18:10:33,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 136 transitions. [2021-12-21 18:10:33,702 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 136 transitions. Word has length 11 [2021-12-21 18:10:33,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:10:33,702 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 136 transitions. [2021-12-21 18:10:33,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:33,702 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 136 transitions. [2021-12-21 18:10:33,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 18:10:33,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:33,703 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:33,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-21 18:10:33,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:10:33,903 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-12-21 18:10:33,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:33,904 INFO L85 PathProgramCache]: Analyzing trace with hash -851124530, now seen corresponding path program 1 times [2021-12-21 18:10:33,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:33,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [61535807] [2021-12-21 18:10:33,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:10:33,904 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:33,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:33,905 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:10:33,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-21 18:10:33,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:10:33,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 18:10:33,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:34,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:10:34,002 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:10:34,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [61535807] [2021-12-21 18:10:34,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [61535807] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:10:34,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:10:34,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:10:34,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499847011] [2021-12-21 18:10:34,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:10:34,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:10:34,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:10:34,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:10:34,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:10:34,005 INFO L87 Difference]: Start difference. First operand 105 states and 136 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:34,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:10:34,033 INFO L93 Difference]: Finished difference Result 89 states and 111 transitions. [2021-12-21 18:10:34,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:10:34,033 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-12-21 18:10:34,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:10:34,034 INFO L225 Difference]: With dead ends: 89 [2021-12-21 18:10:34,034 INFO L226 Difference]: Without dead ends: 87 [2021-12-21 18:10:34,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:10:34,035 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 0 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:10:34,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 245 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:10:34,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-21 18:10:34,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-12-21 18:10:34,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 66 states have (on average 1.5757575757575757) internal successors, (104), 83 states have internal predecessors, (104), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:10:34,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2021-12-21 18:10:34,039 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 11 [2021-12-21 18:10:34,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:10:34,039 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2021-12-21 18:10:34,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:34,040 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2021-12-21 18:10:34,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-21 18:10:34,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:34,040 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:34,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-21 18:10:34,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:10:34,248 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-12-21 18:10:34,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:34,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1832553715, now seen corresponding path program 1 times [2021-12-21 18:10:34,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:34,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1768937689] [2021-12-21 18:10:34,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:10:34,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:34,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:34,250 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:10:34,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-21 18:10:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:10:34,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 18:10:34,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:34,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:10:34,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:34,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:10:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:35,051 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:10:35,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1768937689] [2021-12-21 18:10:35,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1768937689] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:10:35,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:10:35,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-12-21 18:10:35,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991461157] [2021-12-21 18:10:35,052 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:10:35,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 18:10:35,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:10:35,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 18:10:35,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-12-21 18:10:35,053 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:10:35,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:10:35,779 INFO L93 Difference]: Finished difference Result 204 states and 233 transitions. [2021-12-21 18:10:35,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 18:10:35,780 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2021-12-21 18:10:35,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:10:35,781 INFO L225 Difference]: With dead ends: 204 [2021-12-21 18:10:35,781 INFO L226 Difference]: Without dead ends: 204 [2021-12-21 18:10:35,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-12-21 18:10:35,782 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 429 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 18:10:35,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 433 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 256 Invalid, 0 Unknown, 99 Unchecked, 0.5s Time] [2021-12-21 18:10:35,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-12-21 18:10:35,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 96. [2021-12-21 18:10:35,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 75 states have (on average 1.5333333333333334) internal successors, (115), 92 states have internal predecessors, (115), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:10:35,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 120 transitions. [2021-12-21 18:10:35,791 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 120 transitions. Word has length 14 [2021-12-21 18:10:35,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:10:35,791 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 120 transitions. [2021-12-21 18:10:35,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:10:35,792 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 120 transitions. [2021-12-21 18:10:35,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-21 18:10:35,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:35,793 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:35,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-21 18:10:35,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:10:36,000 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-12-21 18:10:36,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:36,000 INFO L85 PathProgramCache]: Analyzing trace with hash -68910454, now seen corresponding path program 1 times [2021-12-21 18:10:36,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:36,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346928119] [2021-12-21 18:10:36,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:10:36,000 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:36,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:36,001 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:10:36,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-21 18:10:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:10:36,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 18:10:36,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:36,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:36,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:10:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:36,251 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:10:36,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346928119] [2021-12-21 18:10:36,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [346928119] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:10:36,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:10:36,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-21 18:10:36,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810797920] [2021-12-21 18:10:36,251 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:10:36,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 18:10:36,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:10:36,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 18:10:36,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:10:36,252 INFO L87 Difference]: Start difference. First operand 96 states and 120 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:10:36,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:10:36,383 INFO L93 Difference]: Finished difference Result 102 states and 124 transitions. [2021-12-21 18:10:36,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 18:10:36,384 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2021-12-21 18:10:36,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:10:36,385 INFO L225 Difference]: With dead ends: 102 [2021-12-21 18:10:36,385 INFO L226 Difference]: Without dead ends: 102 [2021-12-21 18:10:36,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-12-21 18:10:36,385 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 143 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:10:36,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 219 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:10:36,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-21 18:10:36,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-12-21 18:10:36,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 80 states have (on average 1.4875) internal successors, (119), 97 states have internal predecessors, (119), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:10:36,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2021-12-21 18:10:36,390 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 21 [2021-12-21 18:10:36,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:10:36,390 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2021-12-21 18:10:36,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:10:36,390 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2021-12-21 18:10:36,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-21 18:10:36,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:36,391 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:36,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-21 18:10:36,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:10:36,597 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-12-21 18:10:36,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:36,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1435873458, now seen corresponding path program 2 times [2021-12-21 18:10:36,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:36,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921745474] [2021-12-21 18:10:36,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:10:36,598 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:36,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:36,599 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:10:36,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-21 18:10:36,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:10:36,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:10:36,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 18:10:36,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:36,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:10:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:36,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:10:38,520 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:38,520 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:10:38,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921745474] [2021-12-21 18:10:38,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921745474] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:10:38,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:10:38,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-12-21 18:10:38,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971009988] [2021-12-21 18:10:38,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:10:38,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-21 18:10:38,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:10:38,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-21 18:10:38,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-12-21 18:10:38,522 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 22 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:10:41,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:10:41,000 INFO L93 Difference]: Finished difference Result 132 states and 149 transitions. [2021-12-21 18:10:41,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 18:10:41,001 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 22 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-12-21 18:10:41,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:10:41,002 INFO L225 Difference]: With dead ends: 132 [2021-12-21 18:10:41,002 INFO L226 Difference]: Without dead ends: 132 [2021-12-21 18:10:41,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2021-12-21 18:10:41,003 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 471 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:10:41,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 628 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 480 Invalid, 0 Unknown, 91 Unchecked, 1.0s Time] [2021-12-21 18:10:41,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-21 18:10:41,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2021-12-21 18:10:41,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 93 states have (on average 1.4516129032258065) internal successors, (135), 110 states have internal predecessors, (135), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:10:41,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 140 transitions. [2021-12-21 18:10:41,014 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 140 transitions. Word has length 23 [2021-12-21 18:10:41,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:10:41,014 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 140 transitions. [2021-12-21 18:10:41,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 22 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:10:41,014 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 140 transitions. [2021-12-21 18:10:41,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-21 18:10:41,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:41,015 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:41,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-21 18:10:41,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:10:41,222 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-12-21 18:10:41,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:41,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1424196022, now seen corresponding path program 2 times [2021-12-21 18:10:41,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:41,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518700210] [2021-12-21 18:10:41,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:10:41,223 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:41,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:41,224 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:10:41,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-21 18:10:41,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-21 18:10:41,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:10:41,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 18:10:41,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:41,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:10:41,352 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-21 18:10:41,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:10:41,353 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:10:41,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518700210] [2021-12-21 18:10:41,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518700210] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:10:41,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:10:41,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:10:41,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97732860] [2021-12-21 18:10:41,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:10:41,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:10:41,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:10:41,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:10:41,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:10:41,354 INFO L87 Difference]: Start difference. First operand 114 states and 140 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:41,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:10:41,509 INFO L93 Difference]: Finished difference Result 156 states and 185 transitions. [2021-12-21 18:10:41,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:10:41,509 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 33 [2021-12-21 18:10:41,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:10:41,510 INFO L225 Difference]: With dead ends: 156 [2021-12-21 18:10:41,510 INFO L226 Difference]: Without dead ends: 156 [2021-12-21 18:10:41,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 18:10:41,511 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 82 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:10:41,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 196 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:10:41,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-21 18:10:41,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 118. [2021-12-21 18:10:41,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 97 states have (on average 1.4639175257731958) internal successors, (142), 114 states have internal predecessors, (142), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:10:41,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 147 transitions. [2021-12-21 18:10:41,515 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 147 transitions. Word has length 33 [2021-12-21 18:10:41,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:10:41,515 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 147 transitions. [2021-12-21 18:10:41,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:41,515 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 147 transitions. [2021-12-21 18:10:41,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-21 18:10:41,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:41,516 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:41,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-21 18:10:41,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:10:41,716 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-12-21 18:10:41,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:41,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1424196021, now seen corresponding path program 1 times [2021-12-21 18:10:41,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:41,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969330175] [2021-12-21 18:10:41,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:10:41,717 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:41,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:41,718 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:10:41,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-21 18:10:41,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:10:41,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 18:10:41,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:41,933 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:41,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:10:42,201 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:42,201 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:10:42,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969330175] [2021-12-21 18:10:42,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969330175] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:10:42,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:10:42,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-21 18:10:42,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560638907] [2021-12-21 18:10:42,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:10:42,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 18:10:42,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:10:42,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 18:10:42,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-12-21 18:10:42,203 INFO L87 Difference]: Start difference. First operand 118 states and 147 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:10:42,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:10:42,446 INFO L93 Difference]: Finished difference Result 118 states and 143 transitions. [2021-12-21 18:10:42,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 18:10:42,446 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-12-21 18:10:42,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:10:42,447 INFO L225 Difference]: With dead ends: 118 [2021-12-21 18:10:42,447 INFO L226 Difference]: Without dead ends: 118 [2021-12-21 18:10:42,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2021-12-21 18:10:42,448 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 93 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:10:42,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 538 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:10:42,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-21 18:10:42,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-12-21 18:10:42,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 97 states have (on average 1.422680412371134) internal successors, (138), 114 states have internal predecessors, (138), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:10:42,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 143 transitions. [2021-12-21 18:10:42,451 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 143 transitions. Word has length 33 [2021-12-21 18:10:42,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:10:42,451 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 143 transitions. [2021-12-21 18:10:42,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:10:42,452 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 143 transitions. [2021-12-21 18:10:42,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-21 18:10:42,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:42,452 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:42,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-21 18:10:42,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:10:42,654 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-12-21 18:10:42,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:42,655 INFO L85 PathProgramCache]: Analyzing trace with hash 2030306542, now seen corresponding path program 3 times [2021-12-21 18:10:42,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:42,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668367888] [2021-12-21 18:10:42,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 18:10:42,656 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:42,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:42,656 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:10:42,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-21 18:10:42,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-21 18:10:42,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:10:42,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-21 18:10:42,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:42,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:10:43,453 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:43,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:10:48,813 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:48,813 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:10:48,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668367888] [2021-12-21 18:10:48,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668367888] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:10:48,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:10:48,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 36 [2021-12-21 18:10:48,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205804733] [2021-12-21 18:10:48,814 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:10:48,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-21 18:10:48,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:10:48,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-21 18:10:48,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=979, Unknown=0, NotChecked=0, Total=1260 [2021-12-21 18:10:48,816 INFO L87 Difference]: Start difference. First operand 118 states and 143 transitions. Second operand has 36 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:10:53,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:10:53,455 INFO L93 Difference]: Finished difference Result 180 states and 202 transitions. [2021-12-21 18:10:53,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 18:10:53,456 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2021-12-21 18:10:53,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:10:53,457 INFO L225 Difference]: With dead ends: 180 [2021-12-21 18:10:53,457 INFO L226 Difference]: Without dead ends: 180 [2021-12-21 18:10:53,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=316, Invalid=1090, Unknown=0, NotChecked=0, Total=1406 [2021-12-21 18:10:53,458 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 1116 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-21 18:10:53,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1119 Valid, 990 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 938 Invalid, 0 Unknown, 119 Unchecked, 2.6s Time] [2021-12-21 18:10:53,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-21 18:10:53,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 116. [2021-12-21 18:10:53,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 96 states have (on average 1.40625) internal successors, (135), 112 states have internal predecessors, (135), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:10:53,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 140 transitions. [2021-12-21 18:10:53,461 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 140 transitions. Word has length 41 [2021-12-21 18:10:53,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:10:53,461 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 140 transitions. [2021-12-21 18:10:53,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:10:53,461 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 140 transitions. [2021-12-21 18:10:53,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 18:10:53,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:53,462 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:53,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-21 18:10:53,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:10:53,670 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-12-21 18:10:53,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:53,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1720133109, now seen corresponding path program 2 times [2021-12-21 18:10:53,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:53,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065940782] [2021-12-21 18:10:53,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:10:53,671 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:53,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:53,672 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:10:53,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-21 18:10:53,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-21 18:10:53,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:10:53,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 18:10:53,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:53,810 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-21 18:10:53,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:10:53,811 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:10:53,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065940782] [2021-12-21 18:10:53,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065940782] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:10:53,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:10:53,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:10:53,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721618028] [2021-12-21 18:10:53,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:10:53,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:10:53,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:10:53,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:10:53,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:10:53,812 INFO L87 Difference]: Start difference. First operand 116 states and 140 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:53,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:10:53,848 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2021-12-21 18:10:53,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:10:53,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-12-21 18:10:53,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:10:53,850 INFO L225 Difference]: With dead ends: 132 [2021-12-21 18:10:53,850 INFO L226 Difference]: Without dead ends: 132 [2021-12-21 18:10:53,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:10:53,851 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 132 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:10:53,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 113 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:10:53,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-21 18:10:53,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 90. [2021-12-21 18:10:53,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 70 states have (on average 1.3142857142857143) internal successors, (92), 86 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:10:53,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2021-12-21 18:10:53,855 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 45 [2021-12-21 18:10:53,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:10:53,855 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2021-12-21 18:10:53,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:53,855 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2021-12-21 18:10:53,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-21 18:10:53,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:53,856 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:53,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-21 18:10:54,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:10:54,063 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-12-21 18:10:54,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:54,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1217377455, now seen corresponding path program 1 times [2021-12-21 18:10:54,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:54,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779183062] [2021-12-21 18:10:54,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:10:54,064 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:54,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:54,065 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:10:54,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-21 18:10:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:10:54,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 18:10:54,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:54,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:10:54,313 INFO L353 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-21 18:10:54,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2021-12-21 18:10:54,326 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-21 18:10:54,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:10:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-21 18:10:54,489 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:10:54,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779183062] [2021-12-21 18:10:54,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779183062] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:10:54,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:10:54,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-12-21 18:10:54,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616328981] [2021-12-21 18:10:54,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:10:54,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 18:10:54,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:10:54,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 18:10:54,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-21 18:10:54,490 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:10:54,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:10:54,689 INFO L93 Difference]: Finished difference Result 149 states and 166 transitions. [2021-12-21 18:10:54,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 18:10:54,690 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2021-12-21 18:10:54,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:10:54,691 INFO L225 Difference]: With dead ends: 149 [2021-12-21 18:10:54,691 INFO L226 Difference]: Without dead ends: 149 [2021-12-21 18:10:54,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-21 18:10:54,691 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 71 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:10:54,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 418 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 191 Invalid, 0 Unknown, 72 Unchecked, 0.2s Time] [2021-12-21 18:10:54,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-21 18:10:54,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 103. [2021-12-21 18:10:54,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 83 states have (on average 1.3373493975903614) internal successors, (111), 98 states have internal predecessors, (111), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 18:10:54,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 119 transitions. [2021-12-21 18:10:54,694 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 119 transitions. Word has length 50 [2021-12-21 18:10:54,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:10:54,695 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 119 transitions. [2021-12-21 18:10:54,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:10:54,695 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 119 transitions. [2021-12-21 18:10:54,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-21 18:10:54,696 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:54,696 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:54,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-21 18:10:54,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:10:54,904 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-12-21 18:10:54,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:54,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1217377454, now seen corresponding path program 1 times [2021-12-21 18:10:54,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:54,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725252950] [2021-12-21 18:10:54,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:10:54,905 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:54,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:54,906 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:10:54,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-21 18:10:55,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:10:55,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-21 18:10:55,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:55,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:10:55,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:10:57,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:10:57,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-21 18:10:57,453 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:10:57,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2021-12-21 18:10:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-21 18:10:57,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:10:57,947 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:10:57,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725252950] [2021-12-21 18:10:57,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725252950] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:10:57,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [696226272] [2021-12-21 18:10:57,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:10:57,948 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-21 18:10:57,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-21 18:10:57,950 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-21 18:10:57,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-12-21 18:10:58,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:10:58,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-21 18:10:58,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:58,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:10:58,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:10:58,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:10:58,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-21 18:10:58,666 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:10:58,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2021-12-21 18:10:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-21 18:10:58,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:10:58,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [696226272] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:10:58,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:10:58,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-12-21 18:10:58,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282498856] [2021-12-21 18:10:58,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:10:58,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 18:10:58,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:10:58,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 18:10:58,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=128, Unknown=1, NotChecked=0, Total=156 [2021-12-21 18:10:58,993 INFO L87 Difference]: Start difference. First operand 103 states and 119 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:10:59,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:10:59,502 INFO L93 Difference]: Finished difference Result 195 states and 217 transitions. [2021-12-21 18:10:59,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 18:10:59,503 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2021-12-21 18:10:59,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:10:59,504 INFO L225 Difference]: With dead ends: 195 [2021-12-21 18:10:59,504 INFO L226 Difference]: Without dead ends: 195 [2021-12-21 18:10:59,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=43, Invalid=196, Unknown=1, NotChecked=0, Total=240 [2021-12-21 18:10:59,504 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 130 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:10:59,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 520 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 374 Invalid, 0 Unknown, 53 Unchecked, 0.4s Time] [2021-12-21 18:10:59,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-21 18:10:59,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 110. [2021-12-21 18:10:59,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 103 states have internal predecessors, (118), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-21 18:10:59,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 129 transitions. [2021-12-21 18:10:59,508 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 129 transitions. Word has length 50 [2021-12-21 18:10:59,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:10:59,508 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 129 transitions. [2021-12-21 18:10:59,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:10:59,508 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 129 transitions. [2021-12-21 18:10:59,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-21 18:10:59,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:59,509 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:59,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-12-21 18:10:59,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-21 18:10:59,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:10:59,914 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-12-21 18:10:59,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:59,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1668680547, now seen corresponding path program 1 times [2021-12-21 18:10:59,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:59,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245723289] [2021-12-21 18:10:59,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:10:59,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:59,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:59,915 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:10:59,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-21 18:11:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:11:00,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 18:11:00,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:11:00,097 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-21 18:11:00,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:11:00,097 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:11:00,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245723289] [2021-12-21 18:11:00,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245723289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:11:00,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:11:00,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:11:00,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192422029] [2021-12-21 18:11:00,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:11:00,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:11:00,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:11:00,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:11:00,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:11:00,099 INFO L87 Difference]: Start difference. First operand 110 states and 129 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:11:00,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:11:00,139 INFO L93 Difference]: Finished difference Result 156 states and 180 transitions. [2021-12-21 18:11:00,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 18:11:00,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2021-12-21 18:11:00,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:11:00,140 INFO L225 Difference]: With dead ends: 156 [2021-12-21 18:11:00,141 INFO L226 Difference]: Without dead ends: 156 [2021-12-21 18:11:00,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:11:00,141 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 42 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:11:00,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 237 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:11:00,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-21 18:11:00,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 112. [2021-12-21 18:11:00,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 91 states have (on average 1.3076923076923077) internal successors, (119), 104 states have internal predecessors, (119), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-21 18:11:00,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 130 transitions. [2021-12-21 18:11:00,144 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 130 transitions. Word has length 52 [2021-12-21 18:11:00,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:11:00,144 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 130 transitions. [2021-12-21 18:11:00,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:11:00,144 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 130 transitions. [2021-12-21 18:11:00,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-21 18:11:00,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:11:00,145 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:11:00,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-21 18:11:00,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:11:00,352 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-12-21 18:11:00,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:11:00,353 INFO L85 PathProgramCache]: Analyzing trace with hash 74129788, now seen corresponding path program 1 times [2021-12-21 18:11:00,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:11:00,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959050755] [2021-12-21 18:11:00,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:11:00,353 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:11:00,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:11:00,354 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:11:00,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-21 18:11:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:11:00,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 18:11:00,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:11:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-21 18:11:00,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:11:00,518 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:11:00,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959050755] [2021-12-21 18:11:00,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959050755] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:11:00,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:11:00,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:11:00,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211109621] [2021-12-21 18:11:00,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:11:00,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:11:00,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:11:00,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:11:00,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:11:00,520 INFO L87 Difference]: Start difference. First operand 112 states and 130 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:11:00,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:11:00,561 INFO L93 Difference]: Finished difference Result 144 states and 164 transitions. [2021-12-21 18:11:00,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:11:00,562 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2021-12-21 18:11:00,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:11:00,563 INFO L225 Difference]: With dead ends: 144 [2021-12-21 18:11:00,563 INFO L226 Difference]: Without dead ends: 144 [2021-12-21 18:11:00,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:11:00,564 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 51 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:11:00,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 188 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:11:00,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-21 18:11:00,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 114. [2021-12-21 18:11:00,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 93 states have (on average 1.3010752688172043) internal successors, (121), 106 states have internal predecessors, (121), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-21 18:11:00,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 132 transitions. [2021-12-21 18:11:00,567 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 132 transitions. Word has length 52 [2021-12-21 18:11:00,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:11:00,567 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 132 transitions. [2021-12-21 18:11:00,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:11:00,567 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 132 transitions. [2021-12-21 18:11:00,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-21 18:11:00,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:11:00,568 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:11:00,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-21 18:11:00,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:11:00,775 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-12-21 18:11:00,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:11:00,775 INFO L85 PathProgramCache]: Analyzing trace with hash -176607943, now seen corresponding path program 1 times [2021-12-21 18:11:00,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:11:00,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136592717] [2021-12-21 18:11:00,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:11:00,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:11:00,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:11:00,777 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:11:00,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-21 18:11:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:11:00,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 18:11:00,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:11:01,015 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-21 18:11:01,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:11:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-21 18:11:01,132 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:11:01,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136592717] [2021-12-21 18:11:01,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [136592717] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:11:01,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:11:01,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-21 18:11:01,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713605783] [2021-12-21 18:11:01,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:11:01,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:11:01,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:11:01,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:11:01,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:11:01,134 INFO L87 Difference]: Start difference. First operand 114 states and 132 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 18:11:01,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:11:01,270 INFO L93 Difference]: Finished difference Result 314 states and 366 transitions. [2021-12-21 18:11:01,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:11:01,271 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 55 [2021-12-21 18:11:01,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:11:01,272 INFO L225 Difference]: With dead ends: 314 [2021-12-21 18:11:01,272 INFO L226 Difference]: Without dead ends: 314 [2021-12-21 18:11:01,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-12-21 18:11:01,273 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 564 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:11:01,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 311 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:11:01,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-12-21 18:11:01,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 146. [2021-12-21 18:11:01,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 121 states have (on average 1.2975206611570247) internal successors, (157), 132 states have internal predecessors, (157), 8 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-21 18:11:01,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 180 transitions. [2021-12-21 18:11:01,277 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 180 transitions. Word has length 55 [2021-12-21 18:11:01,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:11:01,277 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 180 transitions. [2021-12-21 18:11:01,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 18:11:01,278 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 180 transitions. [2021-12-21 18:11:01,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-21 18:11:01,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:11:01,278 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:11:01,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-21 18:11:01,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:11:01,487 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-12-21 18:11:01,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:11:01,487 INFO L85 PathProgramCache]: Analyzing trace with hash 785915305, now seen corresponding path program 1 times [2021-12-21 18:11:01,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:11:01,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90727398] [2021-12-21 18:11:01,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:11:01,488 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:11:01,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:11:01,488 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) [2021-12-21 18:11:01,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-21 18:11:01,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:11:01,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 18:11:01,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:11:01,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:11:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-21 18:11:01,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:11:01,891 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-21 18:11:01,892 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:11:01,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90727398] [2021-12-21 18:11:01,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90727398] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:11:01,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:11:01,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-12-21 18:11:01,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839709818] [2021-12-21 18:11:01,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:11:01,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:11:01,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:11:01,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:11:01,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:11:01,893 INFO L87 Difference]: Start difference. First operand 146 states and 180 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:11:02,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:11:02,037 INFO L93 Difference]: Finished difference Result 168 states and 200 transitions. [2021-12-21 18:11:02,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 18:11:02,038 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2021-12-21 18:11:02,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:11:02,039 INFO L225 Difference]: With dead ends: 168 [2021-12-21 18:11:02,039 INFO L226 Difference]: Without dead ends: 168 [2021-12-21 18:11:02,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-21 18:11:02,040 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 44 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:11:02,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 244 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2021-12-21 18:11:02,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-21 18:11:02,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 151. [2021-12-21 18:11:02,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 125 states have (on average 1.304) internal successors, (163), 136 states have internal predecessors, (163), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-21 18:11:02,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 186 transitions. [2021-12-21 18:11:02,044 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 186 transitions. Word has length 55 [2021-12-21 18:11:02,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:11:02,044 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 186 transitions. [2021-12-21 18:11:02,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:11:02,045 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 186 transitions. [2021-12-21 18:11:02,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-21 18:11:02,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:11:02,045 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:11:02,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-21 18:11:02,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:11:02,254 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-12-21 18:11:02,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:11:02,254 INFO L85 PathProgramCache]: Analyzing trace with hash 785915306, now seen corresponding path program 1 times [2021-12-21 18:11:02,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:11:02,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [905943362] [2021-12-21 18:11:02,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:11:02,255 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:11:02,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:11:02,256 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:11:02,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-21 18:11:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:11:02,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-21 18:11:02,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:11:02,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:11:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-21 18:11:02,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:11:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-21 18:11:03,495 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:11:03,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [905943362] [2021-12-21 18:11:03,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [905943362] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:11:03,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:11:03,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-12-21 18:11:03,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339150909] [2021-12-21 18:11:03,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:11:03,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 18:11:03,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:11:03,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 18:11:03,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-12-21 18:11:03,497 INFO L87 Difference]: Start difference. First operand 151 states and 186 transitions. Second operand has 16 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 states have internal predecessors, (47), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 18:11:04,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:11:04,224 INFO L93 Difference]: Finished difference Result 217 states and 252 transitions. [2021-12-21 18:11:04,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 18:11:04,225 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 states have internal predecessors, (47), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 55 [2021-12-21 18:11:04,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:11:04,226 INFO L225 Difference]: With dead ends: 217 [2021-12-21 18:11:04,226 INFO L226 Difference]: Without dead ends: 217 [2021-12-21 18:11:04,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-12-21 18:11:04,227 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 421 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:11:04,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 364 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 190 Invalid, 0 Unknown, 133 Unchecked, 0.4s Time] [2021-12-21 18:11:04,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-12-21 18:11:04,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 176. [2021-12-21 18:11:04,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 150 states have (on average 1.38) internal successors, (207), 161 states have internal predecessors, (207), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-21 18:11:04,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 230 transitions. [2021-12-21 18:11:04,231 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 230 transitions. Word has length 55 [2021-12-21 18:11:04,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:11:04,231 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 230 transitions. [2021-12-21 18:11:04,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 states have internal predecessors, (47), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 18:11:04,231 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 230 transitions. [2021-12-21 18:11:04,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 18:11:04,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:11:04,232 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:11:04,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-21 18:11:04,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:11:04,440 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-12-21 18:11:04,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:11:04,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1406429259, now seen corresponding path program 1 times [2021-12-21 18:11:04,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:11:04,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [178545528] [2021-12-21 18:11:04,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:11:04,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:11:04,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:11:04,441 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:11:04,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-21 18:11:04,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:11:04,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-21 18:11:04,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:11:04,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-21 18:11:04,689 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-21 18:11:04,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-12-21 18:11:04,724 INFO L353 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-21 18:11:04,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-21 18:11:04,758 INFO L353 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-21 18:11:04,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-21 18:11:04,792 INFO L353 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-21 18:11:04,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-21 18:11:04,827 INFO L353 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-21 18:11:04,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-21 18:11:04,863 INFO L353 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-21 18:11:04,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-21 18:11:04,900 INFO L353 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-21 18:11:04,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-21 18:11:04,941 INFO L353 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-21 18:11:04,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-21 18:11:04,980 INFO L353 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-21 18:11:04,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-21 18:11:05,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 18:11:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 4 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:11:05,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:11:10,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 84 [2021-12-21 18:11:16,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3236137598451692 treesize of output 3235862720544748