./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/array02-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/array02-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-21 23:57:14,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 23:57:14,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 23:57:14,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 23:57:14,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 23:57:14,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 23:57:14,118 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 23:57:14,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 23:57:14,132 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 23:57:14,137 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 23:57:14,138 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 23:57:14,140 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 23:57:14,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 23:57:14,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 23:57:14,143 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 23:57:14,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 23:57:14,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 23:57:14,146 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 23:57:14,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 23:57:14,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 23:57:14,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 23:57:14,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 23:57:14,156 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 23:57:14,157 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 23:57:14,160 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 23:57:14,160 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 23:57:14,160 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 23:57:14,161 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 23:57:14,162 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 23:57:14,162 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 23:57:14,162 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 23:57:14,163 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 23:57:14,164 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 23:57:14,165 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 23:57:14,166 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 23:57:14,166 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 23:57:14,166 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 23:57:14,166 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 23:57:14,167 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 23:57:14,167 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 23:57:14,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 23:57:14,168 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-21 23:57:14,199 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 23:57:14,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 23:57:14,199 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 23:57:14,199 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 23:57:14,200 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 23:57:14,200 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 23:57:14,201 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 23:57:14,201 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 23:57:14,201 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 23:57:14,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 23:57:14,202 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 23:57:14,202 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 23:57:14,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 23:57:14,203 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 23:57:14,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 23:57:14,203 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 23:57:14,203 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 23:57:14,203 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 23:57:14,203 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 23:57:14,204 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 23:57:14,204 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 23:57:14,204 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 23:57:14,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 23:57:14,204 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 23:57:14,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 23:57:14,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 23:57:14,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 23:57:14,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 23:57:14,206 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 23:57:14,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 23:57:14,206 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 23:57:14,206 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 [2021-12-21 23:57:14,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 23:57:14,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 23:57:14,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 23:57:14,407 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 23:57:14,408 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 23:57:14,409 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-12-21 23:57:14,467 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0899f894e/7b8a2f8346ae4e6c920bec4f92e07442/FLAG6ae40107c [2021-12-21 23:57:14,793 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 23:57:14,793 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-12-21 23:57:14,802 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0899f894e/7b8a2f8346ae4e6c920bec4f92e07442/FLAG6ae40107c [2021-12-21 23:57:15,202 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0899f894e/7b8a2f8346ae4e6c920bec4f92e07442 [2021-12-21 23:57:15,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 23:57:15,205 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 23:57:15,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 23:57:15,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 23:57:15,208 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 23:57:15,209 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:57:15" (1/1) ... [2021-12-21 23:57:15,210 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61914261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:15, skipping insertion in model container [2021-12-21 23:57:15,210 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:57:15" (1/1) ... [2021-12-21 23:57:15,214 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 23:57:15,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 23:57:15,457 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 23:57:15,463 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 23:57:15,465 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@28da52bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:15, skipping insertion in model container [2021-12-21 23:57:15,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 23:57:15,465 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-21 23:57:15,467 INFO L158 Benchmark]: Toolchain (without parser) took 261.23ms. Allocated memory was 94.4MB in the beginning and 121.6MB in the end (delta: 27.3MB). Free memory was 63.8MB in the beginning and 97.6MB in the end (delta: -33.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 23:57:15,468 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 94.4MB. Free memory is still 51.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 23:57:15,469 INFO L158 Benchmark]: CACSL2BoogieTranslator took 259.54ms. Allocated memory was 94.4MB in the beginning and 121.6MB in the end (delta: 27.3MB). Free memory was 63.4MB in the beginning and 97.6MB in the end (delta: -34.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 23:57:15,471 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 94.4MB. Free memory is still 51.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 259.54ms. Allocated memory was 94.4MB in the beginning and 121.6MB in the end (delta: 27.3MB). Free memory was 63.4MB in the beginning and 97.6MB in the end (delta: -34.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 533]: 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/array-memsafety/array02-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-21 23:57:16,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 23:57:16,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 23:57:16,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 23:57:16,882 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 23:57:16,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 23:57:16,884 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 23:57:16,888 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 23:57:16,890 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 23:57:16,893 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 23:57:16,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 23:57:16,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 23:57:16,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 23:57:16,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 23:57:16,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 23:57:16,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 23:57:16,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 23:57:16,902 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 23:57:16,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 23:57:16,908 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 23:57:16,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 23:57:16,910 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 23:57:16,910 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 23:57:16,912 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 23:57:16,916 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 23:57:16,917 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 23:57:16,917 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 23:57:16,918 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 23:57:16,918 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 23:57:16,919 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 23:57:16,919 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 23:57:16,919 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 23:57:16,921 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 23:57:16,921 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 23:57:16,922 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 23:57:16,922 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 23:57:16,922 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 23:57:16,923 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 23:57:16,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 23:57:16,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 23:57:16,924 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 23:57:16,925 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-21 23:57:16,952 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 23:57:16,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 23:57:16,953 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 23:57:16,953 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 23:57:16,954 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 23:57:16,954 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 23:57:16,955 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 23:57:16,955 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 23:57:16,956 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 23:57:16,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 23:57:16,956 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 23:57:16,957 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 23:57:16,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 23:57:16,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 23:57:16,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 23:57:16,957 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 23:57:16,957 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 23:57:16,957 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 23:57:16,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 23:57:16,958 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 23:57:16,958 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-21 23:57:16,958 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-21 23:57:16,958 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 23:57:16,958 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 23:57:16,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 23:57:16,958 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 23:57:16,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 23:57:16,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 23:57:16,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 23:57:16,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 23:57:16,959 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-21 23:57:16,959 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-21 23:57:16,960 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 23:57:16,960 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-21 23:57:16,960 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 [2021-12-21 23:57:17,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 23:57:17,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 23:57:17,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 23:57:17,241 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 23:57:17,241 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 23:57:17,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-12-21 23:57:17,308 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8475dda2a/ec169f11c006487e8b0535f282a82727/FLAG2ae3b0bf1 [2021-12-21 23:57:17,702 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 23:57:17,702 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-12-21 23:57:17,711 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8475dda2a/ec169f11c006487e8b0535f282a82727/FLAG2ae3b0bf1 [2021-12-21 23:57:17,728 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8475dda2a/ec169f11c006487e8b0535f282a82727 [2021-12-21 23:57:17,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 23:57:17,731 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 23:57:17,733 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 23:57:17,733 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 23:57:17,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 23:57:17,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:57:17" (1/1) ... [2021-12-21 23:57:17,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@419563 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:17, skipping insertion in model container [2021-12-21 23:57:17,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:57:17" (1/1) ... [2021-12-21 23:57:17,745 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 23:57:17,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 23:57:18,027 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 23:57:18,035 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-21 23:57:18,040 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 23:57:18,068 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 23:57:18,075 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 23:57:18,105 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 23:57:18,129 INFO L208 MainTranslator]: Completed translation [2021-12-21 23:57:18,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:18 WrapperNode [2021-12-21 23:57:18,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 23:57:18,131 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 23:57:18,131 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 23:57:18,131 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 23:57:18,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:18" (1/1) ... [2021-12-21 23:57:18,163 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:18" (1/1) ... [2021-12-21 23:57:18,183 INFO L137 Inliner]: procedures = 117, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2021-12-21 23:57:18,184 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 23:57:18,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 23:57:18,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 23:57:18,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 23:57:18,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:18" (1/1) ... [2021-12-21 23:57:18,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:18" (1/1) ... [2021-12-21 23:57:18,195 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:18" (1/1) ... [2021-12-21 23:57:18,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:18" (1/1) ... [2021-12-21 23:57:18,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:18" (1/1) ... [2021-12-21 23:57:18,214 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:18" (1/1) ... [2021-12-21 23:57:18,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:18" (1/1) ... [2021-12-21 23:57:18,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 23:57:18,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 23:57:18,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 23:57:18,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 23:57:18,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:18" (1/1) ... [2021-12-21 23:57:18,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 23:57:18,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:57:18,252 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 23:57:18,278 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 23:57:18,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-21 23:57:18,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 23:57:18,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 23:57:18,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-21 23:57:18,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 23:57:18,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 23:57:18,410 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 23:57:18,411 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 23:57:18,639 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 23:57:18,643 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 23:57:18,644 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-21 23:57:18,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:57:18 BoogieIcfgContainer [2021-12-21 23:57:18,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 23:57:18,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 23:57:18,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 23:57:18,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 23:57:18,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:57:17" (1/3) ... [2021-12-21 23:57:18,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e0dab26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:57:18, skipping insertion in model container [2021-12-21 23:57:18,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:18" (2/3) ... [2021-12-21 23:57:18,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e0dab26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:57:18, skipping insertion in model container [2021-12-21 23:57:18,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:57:18" (3/3) ... [2021-12-21 23:57:18,663 INFO L111 eAbstractionObserver]: Analyzing ICFG array02-alloca-2.i [2021-12-21 23:57:18,667 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 23:57:18,667 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2021-12-21 23:57:18,695 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 23:57:18,699 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 23:57:18,699 INFO L340 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2021-12-21 23:57:18,708 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:18,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 23:57:18,713 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:18,713 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 23:57:18,714 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-21 23:57:18,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:18,717 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-12-21 23:57:18,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:18,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [720457106] [2021-12-21 23:57:18,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:18,727 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:18,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:18,729 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 23:57:18,735 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 23:57:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:18,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 23:57:18,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:18,878 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 23:57:18,898 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 23:57:18,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:18,898 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:18,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [720457106] [2021-12-21 23:57:18,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [720457106] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:18,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:18,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 23:57:18,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088856015] [2021-12-21 23:57:18,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:18,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 23:57:18,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:18,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 23:57:18,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 23:57:18,920 INFO L87 Difference]: Start difference. First operand has 42 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:19,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:19,008 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-12-21 23:57:19,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 23:57:19,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-21 23:57:19,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:19,014 INFO L225 Difference]: With dead ends: 41 [2021-12-21 23:57:19,015 INFO L226 Difference]: Without dead ends: 39 [2021-12-21 23:57:19,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 23:57:19,018 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 35 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:19,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 32 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:19,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-21 23:57:19,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-12-21 23:57:19,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.72) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:19,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-12-21 23:57:19,039 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 6 [2021-12-21 23:57:19,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:19,039 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-12-21 23:57:19,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:19,040 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-12-21 23:57:19,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 23:57:19,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:19,040 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 23:57:19,051 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 23:57:19,246 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 23:57:19,246 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-21 23:57:19,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:19,247 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-12-21 23:57:19,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:19,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1952834189] [2021-12-21 23:57:19,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:19,248 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:19,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:19,249 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 23:57:19,249 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 23:57:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:19,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 23:57:19,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:19,323 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 23:57:19,359 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 23:57:19,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:19,361 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:19,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1952834189] [2021-12-21 23:57:19,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1952834189] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:19,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:19,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 23:57:19,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214776192] [2021-12-21 23:57:19,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:19,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 23:57:19,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:19,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 23:57:19,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:57:19,366 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:19,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:19,612 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2021-12-21 23:57:19,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 23:57:19,613 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-21 23:57:19,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:19,614 INFO L225 Difference]: With dead ends: 79 [2021-12-21 23:57:19,614 INFO L226 Difference]: Without dead ends: 79 [2021-12-21 23:57:19,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 23:57:19,615 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 44 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:19,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 150 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 23:57:19,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-21 23:57:19,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 42. [2021-12-21 23:57:19,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:19,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-12-21 23:57:19,620 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 6 [2021-12-21 23:57:19,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:19,620 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-12-21 23:57:19,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:19,621 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-12-21 23:57:19,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 23:57:19,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:19,621 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 23:57:19,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:19,827 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 23:57:19,828 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-21 23:57:19,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:19,828 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2021-12-21 23:57:19,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:19,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [954551917] [2021-12-21 23:57:19,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:19,829 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:19,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:19,831 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 23:57:19,832 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 23:57:19,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:19,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 23:57:19,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:19,917 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 8 treesize of output 7 [2021-12-21 23:57:19,979 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 23:57:19,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:19,981 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:19,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [954551917] [2021-12-21 23:57:19,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [954551917] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:19,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:19,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 23:57:19,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21609972] [2021-12-21 23:57:19,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:19,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 23:57:19,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:19,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 23:57:19,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:57:19,984 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:20,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:20,013 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-12-21 23:57:20,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 23:57:20,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-21 23:57:20,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:20,016 INFO L225 Difference]: With dead ends: 44 [2021-12-21 23:57:20,017 INFO L226 Difference]: Without dead ends: 44 [2021-12-21 23:57:20,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 23:57:20,019 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:20,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 97 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2021-12-21 23:57:20,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-21 23:57:20,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-12-21 23:57:20,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:20,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-12-21 23:57:20,027 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 6 [2021-12-21 23:57:20,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:20,027 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-12-21 23:57:20,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:20,028 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-12-21 23:57:20,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 23:57:20,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:20,028 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:20,035 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 23:57:20,235 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 23:57:20,235 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-21 23:57:20,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:20,236 INFO L85 PathProgramCache]: Analyzing trace with hash 176742583, now seen corresponding path program 1 times [2021-12-21 23:57:20,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:20,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [906162977] [2021-12-21 23:57:20,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:20,236 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:20,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:20,239 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 23:57:20,239 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 23:57:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:20,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 23:57:20,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:20,305 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 23:57:20,319 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 23:57:20,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:20,320 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:20,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [906162977] [2021-12-21 23:57:20,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [906162977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:20,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:20,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 23:57:20,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516143346] [2021-12-21 23:57:20,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:20,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 23:57:20,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:20,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 23:57:20,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:57:20,322 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:20,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:20,417 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-12-21 23:57:20,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 23:57:20,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-21 23:57:20,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:20,418 INFO L225 Difference]: With dead ends: 37 [2021-12-21 23:57:20,418 INFO L226 Difference]: Without dead ends: 37 [2021-12-21 23:57:20,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 23:57:20,419 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 51 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:20,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 29 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:20,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-21 23:57:20,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-12-21 23:57:20,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:20,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-12-21 23:57:20,422 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 8 [2021-12-21 23:57:20,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:20,422 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-12-21 23:57:20,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:20,422 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-12-21 23:57:20,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 23:57:20,423 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:20,423 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:20,432 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 23:57:20,632 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 23:57:20,632 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-21 23:57:20,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:20,633 INFO L85 PathProgramCache]: Analyzing trace with hash 176742584, now seen corresponding path program 1 times [2021-12-21 23:57:20,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:20,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591010108] [2021-12-21 23:57:20,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:20,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:20,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:20,634 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 23:57:20,636 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 23:57:20,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:20,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 23:57:20,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:20,724 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 8 treesize of output 7 [2021-12-21 23:57:20,799 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 23:57:20,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:20,799 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:20,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1591010108] [2021-12-21 23:57:20,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1591010108] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:20,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:20,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:57:20,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950703396] [2021-12-21 23:57:20,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:20,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 23:57:20,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:20,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 23:57:20,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:20,802 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:20,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:20,820 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-12-21 23:57:20,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 23:57:20,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-21 23:57:20,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:20,820 INFO L225 Difference]: With dead ends: 40 [2021-12-21 23:57:20,821 INFO L226 Difference]: Without dead ends: 40 [2021-12-21 23:57:20,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 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 23:57:20,821 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:20,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 89 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 35 Unchecked, 0.0s Time] [2021-12-21 23:57:20,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-21 23:57:20,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-12-21 23:57:20,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.4375) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:20,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-12-21 23:57:20,824 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 8 [2021-12-21 23:57:20,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:20,824 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-12-21 23:57:20,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:20,825 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-12-21 23:57:20,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-21 23:57:20,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:20,825 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:20,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:21,033 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 23:57:21,033 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-21 23:57:21,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:21,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1184052306, now seen corresponding path program 1 times [2021-12-21 23:57:21,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:21,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944795667] [2021-12-21 23:57:21,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:21,034 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:21,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:21,035 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 23:57:21,036 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 23:57:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:21,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 23:57:21,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:21,099 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 23:57:21,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:21,103 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:21,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944795667] [2021-12-21 23:57:21,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1944795667] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:21,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:21,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:57:21,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719014721] [2021-12-21 23:57:21,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:21,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 23:57:21,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:21,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 23:57:21,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:57:21,105 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:21,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:21,133 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-12-21 23:57:21,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 23:57:21,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-21 23:57:21,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:21,135 INFO L225 Difference]: With dead ends: 39 [2021-12-21 23:57:21,135 INFO L226 Difference]: Without dead ends: 39 [2021-12-21 23:57:21,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:57:21,136 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 36 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:21,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 59 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 23:57:21,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-21 23:57:21,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2021-12-21 23:57:21,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:21,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-12-21 23:57:21,139 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 9 [2021-12-21 23:57:21,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:21,139 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-12-21 23:57:21,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:21,139 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-12-21 23:57:21,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-21 23:57:21,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:21,140 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:21,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:21,346 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 23:57:21,346 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-21 23:57:21,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:21,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-12-21 23:57:21,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:21,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500786644] [2021-12-21 23:57:21,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:21,347 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:21,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:21,348 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 23:57:21,349 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 23:57:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:21,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 23:57:21,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:21,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:21,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:21,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:21,469 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:21,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500786644] [2021-12-21 23:57:21,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500786644] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:21,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:57:21,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-21 23:57:21,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231839] [2021-12-21 23:57:21,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:21,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 23:57:21,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:21,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 23:57:21,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-21 23:57:21,471 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:21,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:21,531 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-12-21 23:57:21,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 23:57:21,533 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-21 23:57:21,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:21,534 INFO L225 Difference]: With dead ends: 65 [2021-12-21 23:57:21,534 INFO L226 Difference]: Without dead ends: 65 [2021-12-21 23:57:21,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-21 23:57:21,535 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 84 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:21,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 148 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:21,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-21 23:57:21,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 41. [2021-12-21 23:57:21,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:21,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-12-21 23:57:21,537 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 10 [2021-12-21 23:57:21,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:21,537 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-12-21 23:57:21,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:21,537 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-12-21 23:57:21,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-21 23:57:21,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:21,538 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:21,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:21,738 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 23:57:21,738 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-21 23:57:21,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:21,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-12-21 23:57:21,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:21,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1601732215] [2021-12-21 23:57:21,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:21,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:21,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:21,744 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 23:57:21,744 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 23:57:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:21,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 23:57:21,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:21,802 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 8 treesize of output 7 [2021-12-21 23:57:21,934 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 23:57:21,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:22,293 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 23:57:22,293 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:22,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1601732215] [2021-12-21 23:57:22,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1601732215] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:22,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:57:22,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-12-21 23:57:22,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637425860] [2021-12-21 23:57:22,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:22,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 23:57:22,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:22,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 23:57:22,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-21 23:57:22,295 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:22,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:22,725 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2021-12-21 23:57:22,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 23:57:22,727 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-21 23:57:22,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:22,728 INFO L225 Difference]: With dead ends: 73 [2021-12-21 23:57:22,728 INFO L226 Difference]: Without dead ends: 73 [2021-12-21 23:57:22,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-21 23:57:22,728 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 152 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:22,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 88 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 88 Invalid, 0 Unknown, 25 Unchecked, 0.4s Time] [2021-12-21 23:57:22,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-21 23:57:22,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 49. [2021-12-21 23:57:22,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:22,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-12-21 23:57:22,732 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 10 [2021-12-21 23:57:22,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:22,732 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-12-21 23:57:22,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:22,732 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-12-21 23:57:22,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 23:57:22,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:22,733 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:22,741 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 23:57:22,941 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 23:57:22,941 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-21 23:57:22,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:22,942 INFO L85 PathProgramCache]: Analyzing trace with hash -680998147, now seen corresponding path program 1 times [2021-12-21 23:57:22,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:22,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [711515024] [2021-12-21 23:57:22,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:22,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:22,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:22,943 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 23:57:22,944 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 23:57:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:22,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 23:57:22,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:23,004 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 23:57:23,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:57:23,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:23,056 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:23,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [711515024] [2021-12-21 23:57:23,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [711515024] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:23,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:23,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:57:23,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376961378] [2021-12-21 23:57:23,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:23,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 23:57:23,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:23,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 23:57:23,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:23,058 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:23,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:23,286 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2021-12-21 23:57:23,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 23:57:23,287 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-21 23:57:23,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:23,287 INFO L225 Difference]: With dead ends: 90 [2021-12-21 23:57:23,287 INFO L226 Difference]: Without dead ends: 90 [2021-12-21 23:57:23,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 23:57:23,288 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 111 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:23,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 99 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 23:57:23,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-21 23:57:23,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2021-12-21 23:57:23,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.309090909090909) internal successors, (72), 62 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:23,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2021-12-21 23:57:23,291 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 12 [2021-12-21 23:57:23,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:23,291 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2021-12-21 23:57:23,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:23,291 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2021-12-21 23:57:23,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 23:57:23,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:23,291 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:23,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:23,492 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 23:57:23,492 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-21 23:57:23,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:23,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1074025157, now seen corresponding path program 1 times [2021-12-21 23:57:23,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:23,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [305250083] [2021-12-21 23:57:23,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:23,493 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:23,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:23,493 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 23:57:23,494 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 23:57:23,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:23,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 23:57:23,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:23,555 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 8 treesize of output 7 [2021-12-21 23:57:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:23,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:23,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:23,972 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:23,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [305250083] [2021-12-21 23:57:23,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [305250083] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 23:57:23,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 23:57:23,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-12-21 23:57:23,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659248467] [2021-12-21 23:57:23,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:23,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 23:57:23,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:23,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 23:57:23,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-21 23:57:23,973 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:24,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:24,184 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2021-12-21 23:57:24,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 23:57:24,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-21 23:57:24,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:24,185 INFO L225 Difference]: With dead ends: 63 [2021-12-21 23:57:24,185 INFO L226 Difference]: Without dead ends: 63 [2021-12-21 23:57:24,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-21 23:57:24,186 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 48 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:24,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 35 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:24,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-21 23:57:24,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2021-12-21 23:57:24,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:24,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-12-21 23:57:24,190 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 12 [2021-12-21 23:57:24,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:24,190 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-12-21 23:57:24,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:24,191 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-12-21 23:57:24,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 23:57:24,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:24,191 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:24,197 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 23:57:24,397 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 23:57:24,397 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-21 23:57:24,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:24,397 INFO L85 PathProgramCache]: Analyzing trace with hash 363893421, now seen corresponding path program 1 times [2021-12-21 23:57:24,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:24,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867559604] [2021-12-21 23:57:24,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:24,398 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:24,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:24,399 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 23:57:24,399 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 23:57:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:24,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 23:57:24,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:24,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:57:24,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:24,467 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:24,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867559604] [2021-12-21 23:57:24,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867559604] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:24,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:24,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:57:24,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167887979] [2021-12-21 23:57:24,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:24,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 23:57:24,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:24,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 23:57:24,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:57:24,468 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:24,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:24,561 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2021-12-21 23:57:24,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 23:57:24,561 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-21 23:57:24,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:24,562 INFO L225 Difference]: With dead ends: 80 [2021-12-21 23:57:24,562 INFO L226 Difference]: Without dead ends: 80 [2021-12-21 23:57:24,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:24,562 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 51 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:24,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:24,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-21 23:57:24,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 48. [2021-12-21 23:57:24,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:24,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2021-12-21 23:57:24,565 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 13 [2021-12-21 23:57:24,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:24,565 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2021-12-21 23:57:24,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:24,565 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2021-12-21 23:57:24,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 23:57:24,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:24,565 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:24,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-21 23:57:24,771 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 23:57:24,772 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-21 23:57:24,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:24,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1064957999, now seen corresponding path program 1 times [2021-12-21 23:57:24,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:24,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129385928] [2021-12-21 23:57:24,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:24,772 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:24,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:24,773 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 23:57:24,775 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 23:57:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:24,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 23:57:24,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:24,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:24,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:24,991 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:24,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129385928] [2021-12-21 23:57:24,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129385928] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:24,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:57:24,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-12-21 23:57:24,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052824018] [2021-12-21 23:57:24,991 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:24,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 23:57:24,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:24,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 23:57:24,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-21 23:57:24,992 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:25,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:25,222 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2021-12-21 23:57:25,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 23:57:25,223 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-21 23:57:25,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:25,223 INFO L225 Difference]: With dead ends: 82 [2021-12-21 23:57:25,224 INFO L226 Difference]: Without dead ends: 82 [2021-12-21 23:57:25,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-12-21 23:57:25,224 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 147 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:25,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 95 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 23:57:25,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-21 23:57:25,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 46. [2021-12-21 23:57:25,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:25,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-12-21 23:57:25,226 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 13 [2021-12-21 23:57:25,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:25,226 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-12-21 23:57:25,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:25,227 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-12-21 23:57:25,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 23:57:25,227 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:25,227 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:25,235 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 23:57:25,427 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 23:57:25,427 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-21 23:57:25,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:25,428 INFO L85 PathProgramCache]: Analyzing trace with hash -2110205631, now seen corresponding path program 1 times [2021-12-21 23:57:25,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:25,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789500724] [2021-12-21 23:57:25,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:25,428 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:25,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:25,429 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 23:57:25,430 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 23:57:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:25,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 23:57:25,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:25,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:57:25,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:25,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:57:25,588 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:25,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789500724] [2021-12-21 23:57:25,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789500724] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:25,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:57:25,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-21 23:57:25,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052845470] [2021-12-21 23:57:25,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:25,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 23:57:25,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:25,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 23:57:25,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 23:57:25,589 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:25,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:25,671 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2021-12-21 23:57:25,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 23:57:25,672 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-21 23:57:25,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:25,672 INFO L225 Difference]: With dead ends: 65 [2021-12-21 23:57:25,672 INFO L226 Difference]: Without dead ends: 65 [2021-12-21 23:57:25,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-21 23:57:25,672 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 69 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:25,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 80 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:25,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-21 23:57:25,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2021-12-21 23:57:25,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 61 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:25,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2021-12-21 23:57:25,675 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 18 [2021-12-21 23:57:25,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:25,675 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2021-12-21 23:57:25,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:25,675 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2021-12-21 23:57:25,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 23:57:25,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:25,675 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2021-12-21 23:57:25,684 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 23:57:25,880 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 23:57:25,881 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-21 23:57:25,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:25,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2021-12-21 23:57:25,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:25,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356719639] [2021-12-21 23:57:25,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 23:57:25,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:25,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:25,882 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 23:57:25,884 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 23:57:25,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 23:57:25,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:57:25,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 23:57:25,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:25,943 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 8 treesize of output 7 [2021-12-21 23:57:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:26,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:26,860 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:26,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356719639] [2021-12-21 23:57:26,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356719639] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:26,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:57:26,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-12-21 23:57:26,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968024353] [2021-12-21 23:57:26,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:26,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 23:57:26,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:26,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 23:57:26,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-12-21 23:57:26,861 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:28,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:28,697 INFO L93 Difference]: Finished difference Result 183 states and 205 transitions. [2021-12-21 23:57:28,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 23:57:28,698 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-21 23:57:28,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:28,699 INFO L225 Difference]: With dead ends: 183 [2021-12-21 23:57:28,699 INFO L226 Difference]: Without dead ends: 183 [2021-12-21 23:57:28,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-12-21 23:57:28,700 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 395 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:28,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 338 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 271 Invalid, 0 Unknown, 48 Unchecked, 0.9s Time] [2021-12-21 23:57:28,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-12-21 23:57:28,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 78. [2021-12-21 23:57:28,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 75 states have (on average 1.2) internal successors, (90), 77 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:28,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2021-12-21 23:57:28,703 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 18 [2021-12-21 23:57:28,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:28,703 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2021-12-21 23:57:28,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:28,704 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2021-12-21 23:57:28,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 23:57:28,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:28,704 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:28,711 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 23:57:28,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:28,910 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-21 23:57:28,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:28,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1163693311, now seen corresponding path program 1 times [2021-12-21 23:57:28,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:28,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045379625] [2021-12-21 23:57:28,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:28,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:28,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:28,913 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 23:57:28,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-21 23:57:28,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:28,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 23:57:28,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:28,968 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 8 treesize of output 7 [2021-12-21 23:57:29,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:57:29,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:57:29,691 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:29,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045379625] [2021-12-21 23:57:29,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045379625] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:29,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:57:29,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-12-21 23:57:29,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762625967] [2021-12-21 23:57:29,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:29,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 23:57:29,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:29,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 23:57:29,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-21 23:57:29,692 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:30,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:30,286 INFO L93 Difference]: Finished difference Result 114 states and 132 transitions. [2021-12-21 23:57:30,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 23:57:30,287 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-21 23:57:30,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:30,288 INFO L225 Difference]: With dead ends: 114 [2021-12-21 23:57:30,288 INFO L226 Difference]: Without dead ends: 114 [2021-12-21 23:57:30,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-12-21 23:57:30,289 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 130 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:30,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 114 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 90 Invalid, 0 Unknown, 23 Unchecked, 0.3s Time] [2021-12-21 23:57:30,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-21 23:57:30,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2021-12-21 23:57:30,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 103 states have (on average 1.203883495145631) internal successors, (124), 105 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:30,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2021-12-21 23:57:30,293 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 18 [2021-12-21 23:57:30,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:30,293 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2021-12-21 23:57:30,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:30,294 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2021-12-21 23:57:30,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-21 23:57:30,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:30,294 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:30,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:30,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:30,502 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-21 23:57:30,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:30,502 INFO L85 PathProgramCache]: Analyzing trace with hash -991865623, now seen corresponding path program 1 times [2021-12-21 23:57:30,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:30,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1048863099] [2021-12-21 23:57:30,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:30,503 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:30,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:30,503 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 23:57:30,504 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 23:57:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:30,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 23:57:30,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:30,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 23:57:30,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:30,652 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:30,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1048863099] [2021-12-21 23:57:30,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1048863099] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:30,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:30,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:57:30,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907269313] [2021-12-21 23:57:30,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:30,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 23:57:30,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:30,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 23:57:30,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:30,654 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:30,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:30,671 INFO L93 Difference]: Finished difference Result 142 states and 170 transitions. [2021-12-21 23:57:30,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 23:57:30,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-21 23:57:30,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:30,672 INFO L225 Difference]: With dead ends: 142 [2021-12-21 23:57:30,672 INFO L226 Difference]: Without dead ends: 138 [2021-12-21 23:57:30,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:30,673 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:30,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 77 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 17 Unchecked, 0.0s Time] [2021-12-21 23:57:30,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-21 23:57:30,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 129. [2021-12-21 23:57:30,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 126 states have (on average 1.2301587301587302) internal successors, (155), 128 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:30,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 155 transitions. [2021-12-21 23:57:30,678 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 155 transitions. Word has length 19 [2021-12-21 23:57:30,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:30,679 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 155 transitions. [2021-12-21 23:57:30,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:30,679 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 155 transitions. [2021-12-21 23:57:30,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-21 23:57:30,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:30,683 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:30,692 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 23:57:30,897 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 23:57:30,898 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-21 23:57:30,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:30,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1147657014, now seen corresponding path program 1 times [2021-12-21 23:57:30,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:30,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1703790589] [2021-12-21 23:57:30,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:30,899 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:30,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:30,900 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 23:57:30,901 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 23:57:30,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:30,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 23:57:30,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:31,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 23:57:31,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:31,076 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:31,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1703790589] [2021-12-21 23:57:31,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1703790589] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:31,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:31,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:57:31,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775047494] [2021-12-21 23:57:31,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:31,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 23:57:31,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:31,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 23:57:31,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:31,078 INFO L87 Difference]: Start difference. First operand 129 states and 155 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:31,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:31,088 INFO L93 Difference]: Finished difference Result 173 states and 207 transitions. [2021-12-21 23:57:31,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 23:57:31,088 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-21 23:57:31,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:31,089 INFO L225 Difference]: With dead ends: 173 [2021-12-21 23:57:31,089 INFO L226 Difference]: Without dead ends: 161 [2021-12-21 23:57:31,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:31,090 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:31,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 58 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2021-12-21 23:57:31,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-21 23:57:31,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 139. [2021-12-21 23:57:31,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 136 states have (on average 1.2058823529411764) internal successors, (164), 138 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:31,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 164 transitions. [2021-12-21 23:57:31,092 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 164 transitions. Word has length 25 [2021-12-21 23:57:31,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:31,093 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 164 transitions. [2021-12-21 23:57:31,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:31,093 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 164 transitions. [2021-12-21 23:57:31,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-21 23:57:31,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:31,094 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:31,100 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 23:57:31,300 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 23:57:31,300 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-21 23:57:31,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:31,301 INFO L85 PathProgramCache]: Analyzing trace with hash 989408118, now seen corresponding path program 1 times [2021-12-21 23:57:31,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:31,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1192904287] [2021-12-21 23:57:31,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:31,301 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:31,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:31,302 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 23:57:31,304 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 23:57:31,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:31,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 23:57:31,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:31,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 23:57:31,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:31,512 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:31,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1192904287] [2021-12-21 23:57:31,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1192904287] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:31,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:31,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:57:31,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872417086] [2021-12-21 23:57:31,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:31,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 23:57:31,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:31,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 23:57:31,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:31,515 INFO L87 Difference]: Start difference. First operand 139 states and 164 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:31,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:31,530 INFO L93 Difference]: Finished difference Result 195 states and 234 transitions. [2021-12-21 23:57:31,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 23:57:31,530 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-21 23:57:31,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:31,531 INFO L225 Difference]: With dead ends: 195 [2021-12-21 23:57:31,531 INFO L226 Difference]: Without dead ends: 191 [2021-12-21 23:57:31,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:31,531 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:31,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 58 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2021-12-21 23:57:31,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-21 23:57:31,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 183. [2021-12-21 23:57:31,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 180 states have (on average 1.2222222222222223) internal successors, (220), 182 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:31,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 220 transitions. [2021-12-21 23:57:31,534 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 220 transitions. Word has length 25 [2021-12-21 23:57:31,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:31,534 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 220 transitions. [2021-12-21 23:57:31,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:31,535 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 220 transitions. [2021-12-21 23:57:31,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 23:57:31,535 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:31,535 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:31,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:31,743 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 23:57:31,744 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-21 23:57:31,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:31,744 INFO L85 PathProgramCache]: Analyzing trace with hash -2063932537, now seen corresponding path program 2 times [2021-12-21 23:57:31,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:31,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397694210] [2021-12-21 23:57:31,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 23:57:31,745 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:31,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:31,745 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 23:57:31,748 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 23:57:31,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 23:57:31,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:57:31,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 23:57:31,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:31,827 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 8 treesize of output 7 [2021-12-21 23:57:32,078 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 23:57:32,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:33,370 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:33,371 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:33,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397694210] [2021-12-21 23:57:33,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1397694210] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:33,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:57:33,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-12-21 23:57:33,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438719398] [2021-12-21 23:57:33,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:33,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 23:57:33,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:33,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 23:57:33,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-12-21 23:57:33,372 INFO L87 Difference]: Start difference. First operand 183 states and 220 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:33,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:33,894 INFO L93 Difference]: Finished difference Result 203 states and 241 transitions. [2021-12-21 23:57:33,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 23:57:33,894 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-21 23:57:33,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:33,895 INFO L225 Difference]: With dead ends: 203 [2021-12-21 23:57:33,895 INFO L226 Difference]: Without dead ends: 200 [2021-12-21 23:57:33,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-12-21 23:57:33,896 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 25 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:33,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 167 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 97 Invalid, 0 Unknown, 20 Unchecked, 0.4s Time] [2021-12-21 23:57:33,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-21 23:57:33,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 189. [2021-12-21 23:57:33,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 186 states have (on average 1.2204301075268817) internal successors, (227), 188 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:33,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 227 transitions. [2021-12-21 23:57:33,898 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 227 transitions. Word has length 30 [2021-12-21 23:57:33,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:33,899 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 227 transitions. [2021-12-21 23:57:33,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:33,899 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 227 transitions. [2021-12-21 23:57:33,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-21 23:57:33,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:33,900 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:33,906 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 23:57:34,106 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 23:57:34,106 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-21 23:57:34,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:34,107 INFO L85 PathProgramCache]: Analyzing trace with hash 630576131, now seen corresponding path program 1 times [2021-12-21 23:57:34,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:34,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362932458] [2021-12-21 23:57:34,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:34,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:34,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:34,108 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 23:57:34,109 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 23:57:34,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:34,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 23:57:34,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:34,341 INFO L353 Elim1Store]: treesize reduction 442, result has 12.5 percent of original size [2021-12-21 23:57:34,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 260 treesize of output 93 [2021-12-21 23:57:34,617 INFO L353 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-12-21 23:57:34,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 68 [2021-12-21 23:57:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:57:34,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:34,671 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:34,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362932458] [2021-12-21 23:57:34,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362932458] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:34,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:34,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 23:57:34,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017130847] [2021-12-21 23:57:34,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:34,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 23:57:34,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:34,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 23:57:34,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-21 23:57:34,673 INFO L87 Difference]: Start difference. First operand 189 states and 227 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:34,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:34,790 INFO L93 Difference]: Finished difference Result 187 states and 223 transitions. [2021-12-21 23:57:34,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 23:57:34,791 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-21 23:57:34,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:34,793 INFO L225 Difference]: With dead ends: 187 [2021-12-21 23:57:34,793 INFO L226 Difference]: Without dead ends: 169 [2021-12-21 23:57:34,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-21 23:57:34,793 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:34,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 101 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2021-12-21 23:57:34,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-21 23:57:34,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-12-21 23:57:34,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 166 states have (on average 1.2289156626506024) internal successors, (204), 168 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:34,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 204 transitions. [2021-12-21 23:57:34,796 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 204 transitions. Word has length 31 [2021-12-21 23:57:34,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:34,797 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 204 transitions. [2021-12-21 23:57:34,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:34,797 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 204 transitions. [2021-12-21 23:57:34,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 23:57:34,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:34,797 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2021-12-21 23:57:34,804 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 23:57:35,004 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 23:57:35,004 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-21 23:57:35,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:35,005 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2021-12-21 23:57:35,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:35,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482288226] [2021-12-21 23:57:35,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 23:57:35,005 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:35,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:35,006 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 23:57:35,008 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 23:57:35,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-21 23:57:35,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:57:35,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 23:57:35,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:35,138 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 8 treesize of output 7 [2021-12-21 23:57:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:35,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:38,510 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:38,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482288226] [2021-12-21 23:57:38,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482288226] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:38,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:57:38,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-12-21 23:57:38,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551442676] [2021-12-21 23:57:38,511 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:38,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-21 23:57:38,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:38,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-21 23:57:38,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2021-12-21 23:57:38,512 INFO L87 Difference]: Start difference. First operand 169 states and 204 transitions. Second operand has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:42,206 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 23:57:46,945 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 23:57:55,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:55,359 INFO L93 Difference]: Finished difference Result 1844 states and 2231 transitions. [2021-12-21 23:57:55,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-21 23:57:55,360 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-21 23:57:55,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:55,364 INFO L225 Difference]: With dead ends: 1844 [2021-12-21 23:57:55,364 INFO L226 Difference]: Without dead ends: 1844 [2021-12-21 23:57:55,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=547, Invalid=1259, Unknown=0, NotChecked=0, Total=1806 [2021-12-21 23:57:55,366 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 1335 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1335 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:55,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1335 Valid, 937 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 823 Invalid, 0 Unknown, 16 Unchecked, 5.7s Time] [2021-12-21 23:57:55,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-12-21 23:57:55,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 201. [2021-12-21 23:57:55,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 198 states have (on average 1.2323232323232323) internal successors, (244), 200 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:55,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 244 transitions. [2021-12-21 23:57:55,377 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 244 transitions. Word has length 34 [2021-12-21 23:57:55,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:55,378 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 244 transitions. [2021-12-21 23:57:55,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:55,378 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 244 transitions. [2021-12-21 23:57:55,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 23:57:55,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:55,379 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:55,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:55,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:55,586 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-21 23:57:55,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:55,586 INFO L85 PathProgramCache]: Analyzing trace with hash 913185738, now seen corresponding path program 3 times [2021-12-21 23:57:55,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:55,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627227113] [2021-12-21 23:57:55,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 23:57:55,587 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:55,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:55,588 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 23:57:55,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-21 23:57:55,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-21 23:57:55,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:57:55,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-21 23:57:55,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:55,710 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 8 treesize of output 7 [2021-12-21 23:57:56,150 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:56,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:57,549 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:57,549 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:57,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627227113] [2021-12-21 23:57:57,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627227113] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:57,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:57:57,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-12-21 23:57:57,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591215800] [2021-12-21 23:57:57,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:57,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 23:57:57,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:57,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 23:57:57,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-12-21 23:57:57,551 INFO L87 Difference]: Start difference. First operand 201 states and 244 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:01,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:01,627 INFO L93 Difference]: Finished difference Result 388 states and 456 transitions. [2021-12-21 23:58:01,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-21 23:58:01,628 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-21 23:58:01,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:01,629 INFO L225 Difference]: With dead ends: 388 [2021-12-21 23:58:01,629 INFO L226 Difference]: Without dead ends: 344 [2021-12-21 23:58:01,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2021-12-21 23:58:01,630 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 744 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:01,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [744 Valid, 373 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 23:58:01,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-12-21 23:58:01,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 289. [2021-12-21 23:58:01,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 286 states have (on average 1.2132867132867133) internal successors, (347), 288 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:01,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 347 transitions. [2021-12-21 23:58:01,634 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 347 transitions. Word has length 34 [2021-12-21 23:58:01,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:01,634 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 347 transitions. [2021-12-21 23:58:01,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:01,634 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 347 transitions. [2021-12-21 23:58:01,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-21 23:58:01,634 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:01,634 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:01,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-12-21 23:58:01,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:01,842 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-21 23:58:01,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:01,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1523871233, now seen corresponding path program 1 times [2021-12-21 23:58:01,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:01,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1948444758] [2021-12-21 23:58:01,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:01,843 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:01,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:01,844 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 23:58:01,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-21 23:58:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:01,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 23:58:01,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:02,111 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 23:58:02,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:58:02,242 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 23:58:02,242 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:02,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1948444758] [2021-12-21 23:58:02,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1948444758] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:02,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:58:02,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-12-21 23:58:02,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204364895] [2021-12-21 23:58:02,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:02,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 23:58:02,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:02,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 23:58:02,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-21 23:58:02,243 INFO L87 Difference]: Start difference. First operand 289 states and 347 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:02,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:02,501 INFO L93 Difference]: Finished difference Result 313 states and 372 transitions. [2021-12-21 23:58:02,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 23:58:02,501 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-21 23:58:02,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:02,502 INFO L225 Difference]: With dead ends: 313 [2021-12-21 23:58:02,502 INFO L226 Difference]: Without dead ends: 289 [2021-12-21 23:58:02,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-12-21 23:58:02,503 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 95 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:02,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 165 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 23:58:02,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-12-21 23:58:02,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2021-12-21 23:58:02,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 286 states have (on average 1.2097902097902098) internal successors, (346), 288 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:02,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 346 transitions. [2021-12-21 23:58:02,506 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 346 transitions. Word has length 37 [2021-12-21 23:58:02,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:02,506 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 346 transitions. [2021-12-21 23:58:02,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:02,507 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 346 transitions. [2021-12-21 23:58:02,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-21 23:58:02,507 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:02,507 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 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 23:58:02,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-12-21 23:58:02,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:02,713 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-21 23:58:02,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:02,714 INFO L85 PathProgramCache]: Analyzing trace with hash 599848030, now seen corresponding path program 2 times [2021-12-21 23:58:02,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:02,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110239217] [2021-12-21 23:58:02,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 23:58:02,714 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:02,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:02,715 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 23:58:02,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-21 23:58:02,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-21 23:58:02,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:58:02,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 23:58:02,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:02,938 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 23:58:02,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:58:02,938 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:02,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110239217] [2021-12-21 23:58:02,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110239217] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:58:02,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:58:02,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:58:02,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475826319] [2021-12-21 23:58:02,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:58:02,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 23:58:02,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:02,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 23:58:02,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:58:02,939 INFO L87 Difference]: Start difference. First operand 289 states and 346 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:02,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:02,942 INFO L93 Difference]: Finished difference Result 288 states and 345 transitions. [2021-12-21 23:58:02,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 23:58:02,943 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-21 23:58:02,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:02,943 INFO L225 Difference]: With dead ends: 288 [2021-12-21 23:58:02,944 INFO L226 Difference]: Without dead ends: 240 [2021-12-21 23:58:02,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:58:02,944 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:02,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 59 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2021-12-21 23:58:02,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-21 23:58:02,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 143. [2021-12-21 23:58:02,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 141 states have (on average 1.1914893617021276) internal successors, (168), 142 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:02,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 168 transitions. [2021-12-21 23:58:02,947 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 168 transitions. Word has length 41 [2021-12-21 23:58:02,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:02,947 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 168 transitions. [2021-12-21 23:58:02,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:02,947 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 168 transitions. [2021-12-21 23:58:02,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 23:58:02,948 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:02,948 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:02,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:03,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:03,154 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-21 23:58:03,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:03,154 INFO L85 PathProgramCache]: Analyzing trace with hash -720923439, now seen corresponding path program 4 times [2021-12-21 23:58:03,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:03,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [41918759] [2021-12-21 23:58:03,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 23:58:03,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:03,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:03,155 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 23:58:03,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-21 23:58:03,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 23:58:03,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:58:03,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 23:58:03,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:03,238 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 8 treesize of output 7 [2021-12-21 23:58:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:58:03,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:58:05,839 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:58:05,840 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:05,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [41918759] [2021-12-21 23:58:05,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [41918759] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:05,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:58:05,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2021-12-21 23:58:05,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000185423] [2021-12-21 23:58:05,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:05,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-21 23:58:05,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:05,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-21 23:58:05,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-12-21 23:58:05,841 INFO L87 Difference]: Start difference. First operand 143 states and 168 transitions. Second operand has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:06,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:06,261 INFO L93 Difference]: Finished difference Result 174 states and 204 transitions. [2021-12-21 23:58:06,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 23:58:06,262 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-21 23:58:06,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:06,263 INFO L225 Difference]: With dead ends: 174 [2021-12-21 23:58:06,263 INFO L226 Difference]: Without dead ends: 171 [2021-12-21 23:58:06,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-12-21 23:58:06,263 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 47 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:06,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 347 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 132 Invalid, 0 Unknown, 79 Unchecked, 0.3s Time] [2021-12-21 23:58:06,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-21 23:58:06,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 161. [2021-12-21 23:58:06,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 159 states have (on average 1.20125786163522) internal successors, (191), 160 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:06,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 191 transitions. [2021-12-21 23:58:06,266 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 191 transitions. Word has length 44 [2021-12-21 23:58:06,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:06,266 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 191 transitions. [2021-12-21 23:58:06,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:06,266 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 191 transitions. [2021-12-21 23:58:06,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-21 23:58:06,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:06,266 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:06,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:06,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:06,467 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-21 23:58:06,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:06,467 INFO L85 PathProgramCache]: Analyzing trace with hash 82156500, now seen corresponding path program 5 times [2021-12-21 23:58:06,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:06,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279176389] [2021-12-21 23:58:06,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 23:58:06,468 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:06,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:06,469 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 23:58:06,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-21 23:58:06,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-21 23:58:06,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:58:06,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-21 23:58:06,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:06,639 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 8 treesize of output 7 [2021-12-21 23:58:07,275 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:58:07,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:58:10,057 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:58:10,058 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:10,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279176389] [2021-12-21 23:58:10,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279176389] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:10,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:58:10,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-12-21 23:58:10,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607495201] [2021-12-21 23:58:10,059 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:10,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-21 23:58:10,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:10,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-21 23:58:10,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-12-21 23:58:10,060 INFO L87 Difference]: Start difference. First operand 161 states and 191 transitions. Second operand has 27 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 27 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:17,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:17,912 INFO L93 Difference]: Finished difference Result 343 states and 402 transitions. [2021-12-21 23:58:17,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-21 23:58:17,913 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 27 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-21 23:58:17,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:17,914 INFO L225 Difference]: With dead ends: 343 [2021-12-21 23:58:17,914 INFO L226 Difference]: Without dead ends: 343 [2021-12-21 23:58:17,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=605, Invalid=2047, Unknown=0, NotChecked=0, Total=2652 [2021-12-21 23:58:17,915 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 1357 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1357 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:17,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1357 Valid, 581 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 707 Invalid, 0 Unknown, 106 Unchecked, 2.0s Time] [2021-12-21 23:58:17,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-12-21 23:58:17,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 251. [2021-12-21 23:58:17,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 249 states have (on average 1.1887550200803212) internal successors, (296), 250 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:17,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 296 transitions. [2021-12-21 23:58:17,919 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 296 transitions. Word has length 48 [2021-12-21 23:58:17,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:17,921 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 296 transitions. [2021-12-21 23:58:17,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 27 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:17,921 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 296 transitions. [2021-12-21 23:58:17,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 23:58:17,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:17,922 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:17,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:18,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:18,130 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-21 23:58:18,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:18,131 INFO L85 PathProgramCache]: Analyzing trace with hash -265635160, now seen corresponding path program 1 times [2021-12-21 23:58:18,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:18,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038261584] [2021-12-21 23:58:18,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:18,131 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:18,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:18,132 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 23:58:18,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-21 23:58:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:18,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-21 23:58:18,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:18,233 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 8 treesize of output 7 [2021-12-21 23:58:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 44 proven. 43 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 23:58:18,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:58:21,804 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 23:58:21,804 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:21,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038261584] [2021-12-21 23:58:21,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038261584] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:21,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:58:21,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25 [2021-12-21 23:58:21,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390446641] [2021-12-21 23:58:21,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:21,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-21 23:58:21,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:21,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-21 23:58:21,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-12-21 23:58:21,806 INFO L87 Difference]: Start difference. First operand 251 states and 296 transitions. Second operand has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:22,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:22,479 INFO L93 Difference]: Finished difference Result 274 states and 319 transitions. [2021-12-21 23:58:22,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 23:58:22,480 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-21 23:58:22,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:22,481 INFO L225 Difference]: With dead ends: 274 [2021-12-21 23:58:22,481 INFO L226 Difference]: Without dead ends: 263 [2021-12-21 23:58:22,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-12-21 23:58:22,481 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 65 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:22,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 363 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 167 Invalid, 0 Unknown, 89 Unchecked, 0.6s Time] [2021-12-21 23:58:22,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-12-21 23:58:22,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 249. [2021-12-21 23:58:22,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 247 states have (on average 1.1862348178137652) internal successors, (293), 248 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:22,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 293 transitions. [2021-12-21 23:58:22,489 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 293 transitions. Word has length 56 [2021-12-21 23:58:22,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:22,489 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 293 transitions. [2021-12-21 23:58:22,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:22,489 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 293 transitions. [2021-12-21 23:58:22,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 23:58:22,490 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:22,490 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:22,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-12-21 23:58:22,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:22,698 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-21 23:58:22,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:22,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1427161704, now seen corresponding path program 1 times [2021-12-21 23:58:22,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:22,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459015513] [2021-12-21 23:58:22,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:22,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:22,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:22,699 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 23:58:22,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-21 23:58:22,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:22,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-21 23:58:22,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:22,803 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 8 treesize of output 7 [2021-12-21 23:58:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 44 proven. 44 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 23:58:23,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:58:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 23:58:26,198 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:26,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459015513] [2021-12-21 23:58:26,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459015513] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:26,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:58:26,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25 [2021-12-21 23:58:26,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411265115] [2021-12-21 23:58:26,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:26,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-21 23:58:26,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:26,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-21 23:58:26,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-12-21 23:58:26,199 INFO L87 Difference]: Start difference. First operand 249 states and 293 transitions. Second operand has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:27,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:27,206 INFO L93 Difference]: Finished difference Result 273 states and 317 transitions. [2021-12-21 23:58:27,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 23:58:27,207 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-21 23:58:27,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:27,207 INFO L225 Difference]: With dead ends: 273 [2021-12-21 23:58:27,208 INFO L226 Difference]: Without dead ends: 258 [2021-12-21 23:58:27,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-12-21 23:58:27,208 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 72 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:27,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 316 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 202 Invalid, 0 Unknown, 69 Unchecked, 0.7s Time] [2021-12-21 23:58:27,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-12-21 23:58:27,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 245. [2021-12-21 23:58:27,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 243 states have (on average 1.1851851851851851) internal successors, (288), 244 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:27,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 288 transitions. [2021-12-21 23:58:27,211 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 288 transitions. Word has length 56 [2021-12-21 23:58:27,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:27,212 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 288 transitions. [2021-12-21 23:58:27,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:27,212 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 288 transitions. [2021-12-21 23:58:27,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 23:58:27,212 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:27,213 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:27,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:27,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:27,420 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-21 23:58:27,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:27,421 INFO L85 PathProgramCache]: Analyzing trace with hash -388791448, now seen corresponding path program 2 times [2021-12-21 23:58:27,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:27,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915381438] [2021-12-21 23:58:27,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 23:58:27,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:27,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:27,422 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 23:58:27,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-21 23:58:27,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 23:58:27,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:58:27,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-21 23:58:27,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:27,524 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 8 treesize of output 7 [2021-12-21 23:58:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 44 proven. 43 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 23:58:28,133 INFO L328 TraceCheckSpWp]: Computing backward predicates...