./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test18_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 27e059eb1633b1ab9c045484375455e2667fa3360a55d0bc53eccfa53fe7600f --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 21:12:34,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 21:12:34,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 21:12:34,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 21:12:34,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 21:12:34,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 21:12:34,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 21:12:34,824 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 21:12:34,826 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 21:12:34,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 21:12:34,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 21:12:34,832 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 21:12:34,832 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 21:12:34,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 21:12:34,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 21:12:34,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 21:12:34,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 21:12:34,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 21:12:34,841 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 21:12:34,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 21:12:34,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 21:12:34,848 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 21:12:34,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 21:12:34,850 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 21:12:34,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 21:12:34,853 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 21:12:34,853 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 21:12:34,855 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 21:12:34,855 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 21:12:34,855 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 21:12:34,856 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 21:12:34,856 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 21:12:34,857 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 21:12:34,858 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 21:12:34,859 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 21:12:34,860 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 21:12:34,860 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 21:12:34,860 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 21:12:34,860 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 21:12:34,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 21:12:34,861 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 21:12:34,862 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 21:12:34,891 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 21:12:34,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 21:12:34,892 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 21:12:34,892 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 21:12:34,893 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 21:12:34,893 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 21:12:34,894 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 21:12:34,894 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 21:12:34,894 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 21:12:34,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 21:12:34,895 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 21:12:34,895 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 21:12:34,895 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 21:12:34,895 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 21:12:34,895 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 21:12:34,896 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 21:12:34,896 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 21:12:34,896 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 21:12:34,896 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 21:12:34,896 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 21:12:34,896 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 21:12:34,896 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 21:12:34,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 21:12:34,897 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 21:12:34,897 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 21:12:34,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 21:12:34,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 21:12:34,899 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 21:12:34,899 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 21:12:34,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 21:12:34,899 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 21:12:34,899 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 27e059eb1633b1ab9c045484375455e2667fa3360a55d0bc53eccfa53fe7600f [2021-12-18 21:12:35,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 21:12:35,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 21:12:35,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 21:12:35,115 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 21:12:35,116 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 21:12:35,117 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i [2021-12-18 21:12:35,178 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/061c84f33/25141ac37af643659d8766d364b3fde5/FLAG280bc12ca [2021-12-18 21:12:35,625 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 21:12:35,625 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i [2021-12-18 21:12:35,638 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/061c84f33/25141ac37af643659d8766d364b3fde5/FLAG280bc12ca [2021-12-18 21:12:36,139 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/061c84f33/25141ac37af643659d8766d364b3fde5 [2021-12-18 21:12:36,145 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 21:12:36,147 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 21:12:36,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 21:12:36,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 21:12:36,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 21:12:36,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:12:36" (1/1) ... [2021-12-18 21:12:36,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@137fa924 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:12:36, skipping insertion in model container [2021-12-18 21:12:36,154 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:12:36" (1/1) ... [2021-12-18 21:12:36,160 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 21:12:36,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 21:12:36,521 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:12:36,535 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) [2021-12-18 21:12:36,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5102964b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:12:36, skipping insertion in model container [2021-12-18 21:12:36,536 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 21:12:36,536 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-18 21:12:36,538 INFO L158 Benchmark]: Toolchain (without parser) took 390.04ms. Allocated memory is still 113.2MB. Free memory was 78.1MB in the beginning and 85.2MB in the end (delta: -7.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-18 21:12:36,539 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 73.4MB. Free memory was 29.9MB in the beginning and 29.9MB in the end (delta: 29.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 21:12:36,540 INFO L158 Benchmark]: CACSL2BoogieTranslator took 387.19ms. Allocated memory is still 113.2MB. Free memory was 78.1MB in the beginning and 85.2MB in the end (delta: -7.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-18 21:12:36,542 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 73.4MB. Free memory was 29.9MB in the beginning and 29.9MB in the end (delta: 29.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 387.19ms. Allocated memory is still 113.2MB. Free memory was 78.1MB in the beginning and 85.2MB in the end (delta: -7.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test18_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 27e059eb1633b1ab9c045484375455e2667fa3360a55d0bc53eccfa53fe7600f --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 21:12:38,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 21:12:38,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 21:12:38,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 21:12:38,184 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 21:12:38,187 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 21:12:38,188 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 21:12:38,193 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 21:12:38,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 21:12:38,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 21:12:38,200 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 21:12:38,201 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 21:12:38,201 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 21:12:38,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 21:12:38,205 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 21:12:38,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 21:12:38,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 21:12:38,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 21:12:38,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 21:12:38,216 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 21:12:38,219 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 21:12:38,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 21:12:38,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 21:12:38,223 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 21:12:38,225 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 21:12:38,225 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 21:12:38,225 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 21:12:38,226 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 21:12:38,226 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 21:12:38,227 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 21:12:38,227 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 21:12:38,227 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 21:12:38,228 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 21:12:38,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 21:12:38,230 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 21:12:38,230 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 21:12:38,231 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 21:12:38,231 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 21:12:38,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 21:12:38,233 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 21:12:38,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 21:12:38,234 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-18 21:12:38,263 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 21:12:38,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 21:12:38,264 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 21:12:38,264 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 21:12:38,265 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 21:12:38,265 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 21:12:38,266 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 21:12:38,266 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 21:12:38,266 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 21:12:38,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 21:12:38,267 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 21:12:38,267 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 21:12:38,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 21:12:38,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 21:12:38,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 21:12:38,268 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 21:12:38,268 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 21:12:38,268 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 21:12:38,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 21:12:38,269 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 21:12:38,269 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-18 21:12:38,269 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-18 21:12:38,269 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 21:12:38,269 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 21:12:38,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 21:12:38,269 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 21:12:38,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 21:12:38,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 21:12:38,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 21:12:38,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 21:12:38,270 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-18 21:12:38,270 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-18 21:12:38,271 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 21:12:38,271 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-18 21:12:38,271 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 27e059eb1633b1ab9c045484375455e2667fa3360a55d0bc53eccfa53fe7600f [2021-12-18 21:12:38,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 21:12:38,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 21:12:38,556 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 21:12:38,558 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 21:12:38,558 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 21:12:38,560 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i [2021-12-18 21:12:38,607 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d7e58853/c4235ad93f1940f8b2894ad0ae8f54ba/FLAGed5609d4b [2021-12-18 21:12:39,020 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 21:12:39,021 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i [2021-12-18 21:12:39,046 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d7e58853/c4235ad93f1940f8b2894ad0ae8f54ba/FLAGed5609d4b [2021-12-18 21:12:39,054 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d7e58853/c4235ad93f1940f8b2894ad0ae8f54ba [2021-12-18 21:12:39,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 21:12:39,057 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 21:12:39,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 21:12:39,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 21:12:39,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 21:12:39,076 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:12:39" (1/1) ... [2021-12-18 21:12:39,077 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3da7b6cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:12:39, skipping insertion in model container [2021-12-18 21:12:39,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:12:39" (1/1) ... [2021-12-18 21:12:39,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 21:12:39,123 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 21:12:39,449 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:12:39,463 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-18 21:12:39,471 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 21:12:39,528 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:12:39,533 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 21:12:39,581 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:12:39,624 INFO L208 MainTranslator]: Completed translation [2021-12-18 21:12:39,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:12:39 WrapperNode [2021-12-18 21:12:39,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 21:12:39,626 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 21:12:39,626 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 21:12:39,626 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 21:12:39,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:12:39" (1/1) ... [2021-12-18 21:12:39,655 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:12:39" (1/1) ... [2021-12-18 21:12:39,669 INFO L137 Inliner]: procedures = 165, calls = 73, calls flagged for inlining = 21, calls inlined = 3, statements flattened = 54 [2021-12-18 21:12:39,670 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 21:12:39,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 21:12:39,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 21:12:39,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 21:12:39,676 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:12:39" (1/1) ... [2021-12-18 21:12:39,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:12:39" (1/1) ... [2021-12-18 21:12:39,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:12:39" (1/1) ... [2021-12-18 21:12:39,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:12:39" (1/1) ... [2021-12-18 21:12:39,696 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:12:39" (1/1) ... [2021-12-18 21:12:39,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:12:39" (1/1) ... [2021-12-18 21:12:39,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:12:39" (1/1) ... [2021-12-18 21:12:39,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 21:12:39,713 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 21:12:39,713 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 21:12:39,713 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 21:12:39,714 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:12:39" (1/1) ... [2021-12-18 21:12:39,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 21:12:39,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:12:39,752 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) [2021-12-18 21:12:39,758 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 [2021-12-18 21:12:39,784 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-18 21:12:39,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-18 21:12:39,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 21:12:39,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 21:12:39,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 21:12:39,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 21:12:39,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 21:12:39,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-18 21:12:39,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 21:12:39,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 21:12:39,910 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 21:12:39,911 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 21:12:40,110 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 21:12:40,114 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 21:12:40,114 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-18 21:12:40,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:12:40 BoogieIcfgContainer [2021-12-18 21:12:40,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 21:12:40,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 21:12:40,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 21:12:40,120 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 21:12:40,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 09:12:39" (1/3) ... [2021-12-18 21:12:40,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b408545 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:12:40, skipping insertion in model container [2021-12-18 21:12:40,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:12:39" (2/3) ... [2021-12-18 21:12:40,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b408545 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:12:40, skipping insertion in model container [2021-12-18 21:12:40,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:12:40" (3/3) ... [2021-12-18 21:12:40,124 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test18_2.i [2021-12-18 21:12:40,128 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 21:12:40,128 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-12-18 21:12:40,158 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 21:12:40,163 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 [2021-12-18 21:12:40,163 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-12-18 21:12:40,172 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.72) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 21:12:40,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 21:12:40,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:12:40,178 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:12:40,179 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:12:40,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:12:40,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1121226903, now seen corresponding path program 1 times [2021-12-18 21:12:40,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:12:40,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238593229] [2021-12-18 21:12:40,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:12:40,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:12:40,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:12:40,210 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) [2021-12-18 21:12:40,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-18 21:12:40,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:12:40,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:12:40,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:12:40,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:12:40,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:12:40,363 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:12:40,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238593229] [2021-12-18 21:12:40,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [238593229] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:12:40,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:12:40,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:12:40,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597425511] [2021-12-18 21:12:40,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:12:40,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:12:40,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:12:40,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:12:40,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:12:40,394 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.72) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:12:40,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:12:40,512 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2021-12-18 21:12:40,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:12:40,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-12-18 21:12:40,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:12:40,518 INFO L225 Difference]: With dead ends: 74 [2021-12-18 21:12:40,518 INFO L226 Difference]: Without dead ends: 70 [2021-12-18 21:12:40,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:12:40,522 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 32 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:12:40,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 220 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:12:40,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-18 21:12:40,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 42. [2021-12-18 21:12:40,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 37 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 21:12:40,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-12-18 21:12:40,545 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 11 [2021-12-18 21:12:40,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:12:40,546 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-12-18 21:12:40,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:12:40,546 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-12-18 21:12:40,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 21:12:40,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:12:40,547 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:12:40,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-18 21:12:40,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:12:40,755 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:12:40,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:12:40,756 INFO L85 PathProgramCache]: Analyzing trace with hash 2008730584, now seen corresponding path program 1 times [2021-12-18 21:12:40,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:12:40,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122600683] [2021-12-18 21:12:40,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:12:40,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:12:40,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:12:40,766 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) [2021-12-18 21:12:40,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-18 21:12:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:12:40,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:12:40,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:12:40,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:12:40,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:12:40,838 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:12:40,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122600683] [2021-12-18 21:12:40,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122600683] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:12:40,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:12:40,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 21:12:40,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800537978] [2021-12-18 21:12:40,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:12:40,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 21:12:40,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:12:40,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 21:12:40,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:12:40,840 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:12:40,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:12:40,902 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-12-18 21:12:40,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 21:12:40,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-12-18 21:12:40,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:12:40,904 INFO L225 Difference]: With dead ends: 69 [2021-12-18 21:12:40,904 INFO L226 Difference]: Without dead ends: 67 [2021-12-18 21:12:40,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:12:40,905 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 26 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:12:40,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 145 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:12:40,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-18 21:12:40,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 48. [2021-12-18 21:12:40,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.53125) internal successors, (49), 42 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-18 21:12:40,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2021-12-18 21:12:40,911 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 11 [2021-12-18 21:12:40,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:12:40,911 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2021-12-18 21:12:40,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:12:40,911 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2021-12-18 21:12:40,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-18 21:12:40,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:12:40,912 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:12:40,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-18 21:12:41,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:12:41,119 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:12:41,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:12:41,119 INFO L85 PathProgramCache]: Analyzing trace with hash 398308128, now seen corresponding path program 1 times [2021-12-18 21:12:41,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:12:41,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217384534] [2021-12-18 21:12:41,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:12:41,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:12:41,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:12:41,140 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) [2021-12-18 21:12:41,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-18 21:12:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:12:41,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 21:12:41,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:12:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:12:41,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:12:41,212 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:12:41,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217384534] [2021-12-18 21:12:41,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217384534] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:12:41,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:12:41,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:12:41,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699335510] [2021-12-18 21:12:41,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:12:41,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 21:12:41,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:12:41,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 21:12:41,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:12:41,214 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:12:41,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:12:41,253 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2021-12-18 21:12:41,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 21:12:41,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-12-18 21:12:41,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:12:41,255 INFO L225 Difference]: With dead ends: 83 [2021-12-18 21:12:41,255 INFO L226 Difference]: Without dead ends: 83 [2021-12-18 21:12:41,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:12:41,256 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 86 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:12:41,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 70 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:12:41,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-18 21:12:41,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2021-12-18 21:12:41,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 43 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-18 21:12:41,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-12-18 21:12:41,262 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 12 [2021-12-18 21:12:41,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:12:41,262 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-12-18 21:12:41,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 21:12:41,262 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-12-18 21:12:41,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 21:12:41,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:12:41,263 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:12:41,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-18 21:12:41,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:12:41,471 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:12:41,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:12:41,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1387011810, now seen corresponding path program 1 times [2021-12-18 21:12:41,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:12:41,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232977449] [2021-12-18 21:12:41,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:12:41,473 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:12:41,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:12:41,491 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) [2021-12-18 21:12:41,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-18 21:12:41,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:12:41,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 21:12:41,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:12:41,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:12:41,711 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:12:41,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-18 21:12:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:12:41,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:12:41,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:12:41,919 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:12:41,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232977449] [2021-12-18 21:12:41,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232977449] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:12:41,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:12:41,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-12-18 21:12:41,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785469144] [2021-12-18 21:12:41,920 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:12:41,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 21:12:41,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:12:41,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 21:12:41,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:12:41,921 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:12:42,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:12:42,013 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2021-12-18 21:12:42,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:12:42,014 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 18 [2021-12-18 21:12:42,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:12:42,015 INFO L225 Difference]: With dead ends: 76 [2021-12-18 21:12:42,015 INFO L226 Difference]: Without dead ends: 76 [2021-12-18 21:12:42,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:12:42,016 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:12:42,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 133 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2021-12-18 21:12:42,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-18 21:12:42,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2021-12-18 21:12:42,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.52) internal successors, (76), 60 states have internal predecessors, (76), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-18 21:12:42,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 88 transitions. [2021-12-18 21:12:42,021 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 88 transitions. Word has length 18 [2021-12-18 21:12:42,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:12:42,021 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 88 transitions. [2021-12-18 21:12:42,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:12:42,022 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 88 transitions. [2021-12-18 21:12:42,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 21:12:42,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:12:42,022 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:12:42,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-18 21:12:42,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:12:42,229 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:12:42,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:12:42,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1387011811, now seen corresponding path program 1 times [2021-12-18 21:12:42,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:12:42,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [387402400] [2021-12-18 21:12:42,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:12:42,231 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:12:42,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:12:42,232 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) [2021-12-18 21:12:42,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-18 21:12:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:12:42,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-18 21:12:42,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:12:42,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:12:42,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:12:42,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:12:42,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:12:42,494 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:12:42,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:12:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:12:42,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:12:44,856 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:12:44,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [387402400] [2021-12-18 21:12:44,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [387402400] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:12:44,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [654171367] [2021-12-18 21:12:44,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:12:44,856 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:12:44,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:12:44,858 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:12:44,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-12-18 21:12:44,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:12:44,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-18 21:12:44,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:12:44,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:12:44,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:12:47,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:12:47,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:12:47,096 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:12:47,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:12:47,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:12:47,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:12:49,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [654171367] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:12:49,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:12:49,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-12-18 21:12:49,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670959981] [2021-12-18 21:12:49,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:12:49,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 21:12:49,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:12:49,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 21:12:49,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=106, Unknown=1, NotChecked=0, Total=132 [2021-12-18 21:12:49,385 INFO L87 Difference]: Start difference. First operand 69 states and 88 transitions. Second operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 21:12:51,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:12:51,786 INFO L93 Difference]: Finished difference Result 139 states and 168 transitions. [2021-12-18 21:12:51,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 21:12:51,786 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-12-18 21:12:51,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:12:51,787 INFO L225 Difference]: With dead ends: 139 [2021-12-18 21:12:51,787 INFO L226 Difference]: Without dead ends: 139 [2021-12-18 21:12:51,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=34, Invalid=146, Unknown=2, NotChecked=0, Total=182 [2021-12-18 21:12:51,788 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 67 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:12:51,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 384 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 323 Invalid, 0 Unknown, 36 Unchecked, 0.3s Time] [2021-12-18 21:12:51,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-18 21:12:51,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 84. [2021-12-18 21:12:51,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 64 states have (on average 1.546875) internal successors, (99), 74 states have internal predecessors, (99), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-18 21:12:51,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 114 transitions. [2021-12-18 21:12:51,803 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 114 transitions. Word has length 18 [2021-12-18 21:12:51,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:12:51,803 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 114 transitions. [2021-12-18 21:12:51,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 21:12:51,805 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 114 transitions. [2021-12-18 21:12:51,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 21:12:51,805 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:12:51,806 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:12:51,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-12-18 21:12:52,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-18 21:12:52,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:12:52,208 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:12:52,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:12:52,208 INFO L85 PathProgramCache]: Analyzing trace with hash 881453185, now seen corresponding path program 1 times [2021-12-18 21:12:52,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:12:52,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1601408096] [2021-12-18 21:12:52,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:12:52,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:12:52,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:12:52,210 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) [2021-12-18 21:12:52,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-18 21:12:52,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:12:52,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:12:52,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:12:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:12:52,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:12:52,310 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:12:52,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1601408096] [2021-12-18 21:12:52,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1601408096] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:12:52,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:12:52,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:12:52,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544479329] [2021-12-18 21:12:52,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:12:52,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:12:52,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:12:52,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:12:52,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:12:52,311 INFO L87 Difference]: Start difference. First operand 84 states and 114 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 21:12:52,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:12:52,376 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2021-12-18 21:12:52,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:12:52,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-12-18 21:12:52,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:12:52,377 INFO L225 Difference]: With dead ends: 68 [2021-12-18 21:12:52,377 INFO L226 Difference]: Without dead ends: 64 [2021-12-18 21:12:52,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:12:52,378 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:12:52,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 156 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:12:52,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-18 21:12:52,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2021-12-18 21:12:52,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.553191489361702) internal successors, (73), 56 states have internal predecessors, (73), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:12:52,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2021-12-18 21:12:52,382 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 18 [2021-12-18 21:12:52,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:12:52,382 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2021-12-18 21:12:52,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 21:12:52,382 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2021-12-18 21:12:52,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-18 21:12:52,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:12:52,382 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:12:52,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-18 21:12:52,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:12:52,583 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:12:52,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:12:52,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1478437295, now seen corresponding path program 1 times [2021-12-18 21:12:52,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:12:52,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1541025848] [2021-12-18 21:12:52,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:12:52,584 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:12:52,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:12:52,585 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) [2021-12-18 21:12:52,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-18 21:12:52,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:12:52,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:12:52,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:12:52,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:12:52,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:12:52,672 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:12:52,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1541025848] [2021-12-18 21:12:52,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1541025848] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:12:52,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:12:52,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:12:52,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219954118] [2021-12-18 21:12:52,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:12:52,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:12:52,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:12:52,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:12:52,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:12:52,674 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 21:12:52,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:12:52,703 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2021-12-18 21:12:52,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 21:12:52,703 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-12-18 21:12:52,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:12:52,704 INFO L225 Difference]: With dead ends: 79 [2021-12-18 21:12:52,704 INFO L226 Difference]: Without dead ends: 79 [2021-12-18 21:12:52,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:12:52,704 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:12:52,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 156 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:12:52,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-18 21:12:52,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2021-12-18 21:12:52,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 52 states have (on average 1.5) internal successors, (78), 60 states have internal predecessors, (78), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:12:52,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2021-12-18 21:12:52,708 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 20 [2021-12-18 21:12:52,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:12:52,708 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2021-12-18 21:12:52,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 21:12:52,709 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2021-12-18 21:12:52,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-18 21:12:52,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:12:52,709 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:12:52,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-18 21:12:52,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:12:52,910 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:12:52,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:12:52,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1073719666, now seen corresponding path program 1 times [2021-12-18 21:12:52,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:12:52,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2074952581] [2021-12-18 21:12:52,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:12:52,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:12:52,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:12:52,912 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) [2021-12-18 21:12:52,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-18 21:12:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:12:52,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 21:12:52,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:12:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:12:52,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:12:52,990 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:12:52,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2074952581] [2021-12-18 21:12:52,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2074952581] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:12:52,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:12:52,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:12:52,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495712451] [2021-12-18 21:12:52,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:12:52,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 21:12:52,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:12:52,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 21:12:52,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:12:52,992 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 21:12:53,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:12:53,055 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2021-12-18 21:12:53,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 21:12:53,056 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-12-18 21:12:53,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:12:53,057 INFO L225 Difference]: With dead ends: 67 [2021-12-18 21:12:53,057 INFO L226 Difference]: Without dead ends: 67 [2021-12-18 21:12:53,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:12:53,057 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 17 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:12:53,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 102 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:12:53,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-18 21:12:53,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2021-12-18 21:12:53,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 52 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:12:53,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2021-12-18 21:12:53,061 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 20 [2021-12-18 21:12:53,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:12:53,061 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2021-12-18 21:12:53,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 21:12:53,061 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2021-12-18 21:12:53,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-18 21:12:53,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:12:53,061 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:12:53,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-18 21:12:53,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:12:53,268 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:12:53,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:12:53,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1074427268, now seen corresponding path program 1 times [2021-12-18 21:12:53,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:12:53,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2027512988] [2021-12-18 21:12:53,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:12:53,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:12:53,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:12:53,271 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) [2021-12-18 21:12:53,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-18 21:12:53,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:12:53,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 21:12:53,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:12:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:12:53,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:12:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:12:53,580 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:12:53,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2027512988] [2021-12-18 21:12:53,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2027512988] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:12:53,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:12:53,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-18 21:12:53,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968695290] [2021-12-18 21:12:53,580 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:12:53,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 21:12:53,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:12:53,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 21:12:53,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:12:53,581 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:12:53,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:12:53,684 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2021-12-18 21:12:53,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:12:53,685 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2021-12-18 21:12:53,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:12:53,685 INFO L225 Difference]: With dead ends: 59 [2021-12-18 21:12:53,685 INFO L226 Difference]: Without dead ends: 59 [2021-12-18 21:12:53,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:12:53,686 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 84 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:12:53,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 99 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2021-12-18 21:12:53,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-18 21:12:53,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-12-18 21:12:53,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 51 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-18 21:12:53,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2021-12-18 21:12:53,689 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 21 [2021-12-18 21:12:53,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:12:53,689 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2021-12-18 21:12:53,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:12:53,689 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2021-12-18 21:12:53,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-18 21:12:53,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:12:53,690 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:12:53,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-18 21:12:53,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:12:53,896 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:12:53,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:12:53,896 INFO L85 PathProgramCache]: Analyzing trace with hash -807401739, now seen corresponding path program 1 times [2021-12-18 21:12:53,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:12:53,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1297509409] [2021-12-18 21:12:53,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:12:53,897 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:12:53,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:12:53,898 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) [2021-12-18 21:12:53,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-18 21:12:53,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:12:53,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:12:53,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:12:54,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:12:54,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:12:54,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:12:54,070 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:12:54,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1297509409] [2021-12-18 21:12:54,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1297509409] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:12:54,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:12:54,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-18 21:12:54,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714941880] [2021-12-18 21:12:54,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:12:54,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 21:12:54,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:12:54,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 21:12:54,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:12:54,071 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:12:54,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:12:54,158 INFO L93 Difference]: Finished difference Result 137 states and 156 transitions. [2021-12-18 21:12:54,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:12:54,158 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 22 [2021-12-18 21:12:54,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:12:54,159 INFO L225 Difference]: With dead ends: 137 [2021-12-18 21:12:54,159 INFO L226 Difference]: Without dead ends: 137 [2021-12-18 21:12:54,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:12:54,160 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 247 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:12:54,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 158 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:12:54,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-18 21:12:54,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 77. [2021-12-18 21:12:54,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 65 states have internal predecessors, (80), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-18 21:12:54,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2021-12-18 21:12:54,163 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 22 [2021-12-18 21:12:54,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:12:54,163 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2021-12-18 21:12:54,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:12:54,163 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2021-12-18 21:12:54,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-18 21:12:54,164 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:12:54,164 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] [2021-12-18 21:12:54,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-18 21:12:54,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:12:54,364 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:12:54,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:12:54,365 INFO L85 PathProgramCache]: Analyzing trace with hash -2128418719, now seen corresponding path program 1 times [2021-12-18 21:12:54,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:12:54,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1970973509] [2021-12-18 21:12:54,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:12:54,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:12:54,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:12:54,366 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) [2021-12-18 21:12:54,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-18 21:12:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:12:54,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 21:12:54,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:12:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:12:54,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:12:54,803 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:12:54,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1970973509] [2021-12-18 21:12:54,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1970973509] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:12:54,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1316631165] [2021-12-18 21:12:54,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:12:54,804 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:12:54,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:12:54,805 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:12:54,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-12-18 21:12:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:12:54,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-18 21:12:54,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:12:55,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:12:55,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:12:55,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1316631165] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:12:55,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:12:55,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-12-18 21:12:55,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830713044] [2021-12-18 21:12:55,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:12:55,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 21:12:55,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:12:55,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 21:12:55,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-18 21:12:55,207 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand has 12 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:12:55,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:12:55,242 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2021-12-18 21:12:55,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 21:12:55,242 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 24 [2021-12-18 21:12:55,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:12:55,243 INFO L225 Difference]: With dead ends: 82 [2021-12-18 21:12:55,243 INFO L226 Difference]: Without dead ends: 75 [2021-12-18 21:12:55,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-18 21:12:55,243 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:12:55,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 224 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 67 Unchecked, 0.0s Time] [2021-12-18 21:12:55,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-18 21:12:55,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2021-12-18 21:12:55,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 61 states have internal predecessors, (74), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-18 21:12:55,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2021-12-18 21:12:55,246 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 24 [2021-12-18 21:12:55,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:12:55,246 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2021-12-18 21:12:55,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:12:55,247 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2021-12-18 21:12:55,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-18 21:12:55,247 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:12:55,247 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:12:55,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-12-18 21:12:55,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-18 21:12:55,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:12:55,650 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:12:55,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:12:55,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1844216072, now seen corresponding path program 1 times [2021-12-18 21:12:55,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:12:55,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775889945] [2021-12-18 21:12:55,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:12:55,650 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:12:55,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:12:55,651 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) [2021-12-18 21:12:55,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-18 21:12:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:12:55,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-18 21:12:55,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:12:55,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:12:55,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:12:57,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:12:57,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:12:57,940 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:12:57,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:13:00,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:13:00,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:13:00,107 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:13:00,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:13:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:13:00,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:13:02,493 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:13:02,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775889945] [2021-12-18 21:13:02,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775889945] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:13:02,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1280612262] [2021-12-18 21:13:02,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:13:02,493 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:13:02,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:13:02,494 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:13:02,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-12-18 21:13:02,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:13:02,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-18 21:13:02,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:13:02,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:13:02,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:13:04,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:13:04,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:13:04,767 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:13:04,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:13:04,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:13:04,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:13:04,882 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:13:04,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:13:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:13:04,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:13:05,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1280612262] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:13:05,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:13:05,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-12-18 21:13:05,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419155312] [2021-12-18 21:13:05,187 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:13:05,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 21:13:05,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:13:05,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 21:13:05,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=147, Unknown=2, NotChecked=0, Total=182 [2021-12-18 21:13:05,188 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 12 states, 10 states have (on average 1.9) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:13:07,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:13:07,510 INFO L93 Difference]: Finished difference Result 101 states and 117 transitions. [2021-12-18 21:13:07,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 21:13:07,510 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-12-18 21:13:07,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:13:07,511 INFO L225 Difference]: With dead ends: 101 [2021-12-18 21:13:07,511 INFO L226 Difference]: Without dead ends: 101 [2021-12-18 21:13:07,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=42, Invalid=195, Unknown=3, NotChecked=0, Total=240 [2021-12-18 21:13:07,511 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 37 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:13:07,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 256 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 267 Invalid, 0 Unknown, 41 Unchecked, 0.3s Time] [2021-12-18 21:13:07,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-18 21:13:07,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2021-12-18 21:13:07,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.393939393939394) internal successors, (92), 72 states have internal predecessors, (92), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-18 21:13:07,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 106 transitions. [2021-12-18 21:13:07,514 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 106 transitions. Word has length 28 [2021-12-18 21:13:07,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:13:07,514 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 106 transitions. [2021-12-18 21:13:07,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 21:13:07,514 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 106 transitions. [2021-12-18 21:13:07,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-18 21:13:07,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:13:07,515 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:13:07,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-12-18 21:13:07,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-18 21:13:07,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:13:07,916 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:13:07,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:13:07,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1022360221, now seen corresponding path program 1 times [2021-12-18 21:13:07,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:13:07,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [824027848] [2021-12-18 21:13:07,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:13:07,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:13:07,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:13:07,918 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) [2021-12-18 21:13:07,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-18 21:13:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:13:07,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-18 21:13:07,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:13:08,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:13:08,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:13:08,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-12-18 21:13:09,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:13:09,072 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:13:09,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [824027848] [2021-12-18 21:13:09,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [824027848] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:13:09,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:13:09,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-12-18 21:13:09,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725275035] [2021-12-18 21:13:09,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:13:09,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-18 21:13:09,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:13:09,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-18 21:13:09,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-12-18 21:13:09,073 INFO L87 Difference]: Start difference. First operand 83 states and 106 transitions. Second operand has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:13:10,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:13:10,846 INFO L93 Difference]: Finished difference Result 154 states and 170 transitions. [2021-12-18 21:13:10,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 21:13:10,847 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 30 [2021-12-18 21:13:10,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:13:10,848 INFO L225 Difference]: With dead ends: 154 [2021-12-18 21:13:10,848 INFO L226 Difference]: Without dead ends: 154 [2021-12-18 21:13:10,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-12-18 21:13:10,849 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 200 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:13:10,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 282 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 313 Invalid, 0 Unknown, 62 Unchecked, 1.0s Time] [2021-12-18 21:13:10,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-12-18 21:13:10,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 86. [2021-12-18 21:13:10,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 74 states have internal predecessors, (92), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-18 21:13:10,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2021-12-18 21:13:10,852 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 30 [2021-12-18 21:13:10,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:13:10,852 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2021-12-18 21:13:10,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:13:10,852 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2021-12-18 21:13:10,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-18 21:13:10,853 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:13:10,853 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:13:10,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-12-18 21:13:11,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:13:11,054 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:13:11,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:13:11,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1628395789, now seen corresponding path program 1 times [2021-12-18 21:13:11,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:13:11,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111057639] [2021-12-18 21:13:11,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:13:11,054 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:13:11,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:13:11,055 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) [2021-12-18 21:13:11,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-18 21:13:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:13:11,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-18 21:13:11,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:13:11,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:13:11,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:13:11,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:13:11,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:13:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 21:13:11,532 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:13:11,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111057639] [2021-12-18 21:13:11,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111057639] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:13:11,532 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:13:11,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-12-18 21:13:11,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385841987] [2021-12-18 21:13:11,532 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:13:11,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-18 21:13:11,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:13:11,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-18 21:13:11,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-12-18 21:13:11,533 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 14 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-18 21:13:12,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:13:12,172 INFO L93 Difference]: Finished difference Result 119 states and 130 transitions. [2021-12-18 21:13:12,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 21:13:12,173 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 14 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 31 [2021-12-18 21:13:12,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:13:12,173 INFO L225 Difference]: With dead ends: 119 [2021-12-18 21:13:12,174 INFO L226 Difference]: Without dead ends: 119 [2021-12-18 21:13:12,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-12-18 21:13:12,174 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 201 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:13:12,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 301 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 406 Invalid, 0 Unknown, 39 Unchecked, 0.3s Time] [2021-12-18 21:13:12,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-18 21:13:12,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2021-12-18 21:13:12,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 74 states have (on average 1.337837837837838) internal successors, (99), 81 states have internal predecessors, (99), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-18 21:13:12,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2021-12-18 21:13:12,177 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 31 [2021-12-18 21:13:12,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:13:12,177 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2021-12-18 21:13:12,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 14 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-18 21:13:12,177 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2021-12-18 21:13:12,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-18 21:13:12,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:13:12,178 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:13:12,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-18 21:13:12,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:13:12,378 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:13:12,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:13:12,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1059338178, now seen corresponding path program 1 times [2021-12-18 21:13:12,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:13:12,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381321179] [2021-12-18 21:13:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:13:12,379 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:13:12,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:13:12,380 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) [2021-12-18 21:13:12,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-18 21:13:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:13:12,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-18 21:13:12,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:13:12,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:13:13,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:13:13,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:13:13,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:13:13,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-18 21:13:13,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2021-12-18 21:13:13,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 21:13:13,426 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:13:13,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381321179] [2021-12-18 21:13:13,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381321179] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:13:13,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:13:13,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 21 [2021-12-18 21:13:13,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941494225] [2021-12-18 21:13:13,427 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:13:13,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-18 21:13:13,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:13:13,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-18 21:13:13,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-12-18 21:13:13,427 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:13:13,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:13:13,738 INFO L93 Difference]: Finished difference Result 155 states and 181 transitions. [2021-12-18 21:13:13,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 21:13:13,738 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 32 [2021-12-18 21:13:13,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:13:13,740 INFO L225 Difference]: With dead ends: 155 [2021-12-18 21:13:13,740 INFO L226 Difference]: Without dead ends: 155 [2021-12-18 21:13:13,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-12-18 21:13:13,741 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 24 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:13:13,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 317 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 122 Invalid, 0 Unknown, 88 Unchecked, 0.2s Time] [2021-12-18 21:13:13,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-18 21:13:13,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 135. [2021-12-18 21:13:13,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 117 states have internal predecessors, (142), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 21:13:13,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 165 transitions. [2021-12-18 21:13:13,744 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 165 transitions. Word has length 32 [2021-12-18 21:13:13,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:13:13,744 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 165 transitions. [2021-12-18 21:13:13,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:13:13,744 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 165 transitions. [2021-12-18 21:13:13,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-18 21:13:13,745 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:13:13,745 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:13:13,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-18 21:13:13,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:13:13,955 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:13:13,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:13:13,955 INFO L85 PathProgramCache]: Analyzing trace with hash 650513953, now seen corresponding path program 2 times [2021-12-18 21:13:13,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:13:13,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324674651] [2021-12-18 21:13:13,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:13:13,956 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:13:13,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:13:13,958 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) [2021-12-18 21:13:13,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-18 21:13:14,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:13:14,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:13:14,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:13:14,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:13:14,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:13:14,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:13:14,075 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:13:14,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324674651] [2021-12-18 21:13:14,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324674651] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:13:14,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:13:14,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:13:14,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098075927] [2021-12-18 21:13:14,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:13:14,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:13:14,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:13:14,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:13:14,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:13:14,076 INFO L87 Difference]: Start difference. First operand 135 states and 165 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:13:14,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:13:14,095 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2021-12-18 21:13:14,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:13:14,096 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2021-12-18 21:13:14,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:13:14,096 INFO L225 Difference]: With dead ends: 103 [2021-12-18 21:13:14,096 INFO L226 Difference]: Without dead ends: 99 [2021-12-18 21:13:14,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:13:14,097 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 21 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:13:14,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 135 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:13:14,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-18 21:13:14,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2021-12-18 21:13:14,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 74 states have (on average 1.2837837837837838) internal successors, (95), 82 states have internal predecessors, (95), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-18 21:13:14,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2021-12-18 21:13:14,099 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 32 [2021-12-18 21:13:14,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:13:14,099 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2021-12-18 21:13:14,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 21:13:14,099 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2021-12-18 21:13:14,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-18 21:13:14,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:13:14,100 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:13:14,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-12-18 21:13:14,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:13:14,300 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:13:14,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:13:14,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1520254763, now seen corresponding path program 1 times [2021-12-18 21:13:14,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:13:14,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986770746] [2021-12-18 21:13:14,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:13:14,301 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:13:14,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:13:14,302 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) [2021-12-18 21:13:14,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-18 21:13:14,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:13:14,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-18 21:13:14,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:13:14,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:13:14,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:13:14,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-12-18 21:13:14,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-12-18 21:13:14,624 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:13:14,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:13:14,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2021-12-18 21:13:14,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 42 [2021-12-18 21:13:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:13:14,955 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:13:14,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986770746] [2021-12-18 21:13:14,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [986770746] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:13:14,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:13:14,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-12-18 21:13:14,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826955164] [2021-12-18 21:13:14,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:13:14,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-18 21:13:14,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:13:14,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-18 21:13:14,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-12-18 21:13:14,956 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 16 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-18 21:13:15,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:13:15,746 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2021-12-18 21:13:15,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 21:13:15,747 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 16 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 33 [2021-12-18 21:13:15,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:13:15,748 INFO L225 Difference]: With dead ends: 100 [2021-12-18 21:13:15,748 INFO L226 Difference]: Without dead ends: 100 [2021-12-18 21:13:15,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-12-18 21:13:15,748 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 39 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:13:15,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 306 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 463 Invalid, 0 Unknown, 45 Unchecked, 0.5s Time] [2021-12-18 21:13:15,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-18 21:13:15,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2021-12-18 21:13:15,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 76 states have (on average 1.2763157894736843) internal successors, (97), 84 states have internal predecessors, (97), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-18 21:13:15,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2021-12-18 21:13:15,751 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 33 [2021-12-18 21:13:15,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:13:15,751 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2021-12-18 21:13:15,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 16 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-18 21:13:15,752 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2021-12-18 21:13:15,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-18 21:13:15,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:13:15,752 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:13:15,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-18 21:13:15,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:13:15,953 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:13:15,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:13:15,953 INFO L85 PathProgramCache]: Analyzing trace with hash 520579815, now seen corresponding path program 1 times [2021-12-18 21:13:15,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:13:15,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465298733] [2021-12-18 21:13:15,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:13:15,954 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:13:15,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:13:15,954 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) [2021-12-18 21:13:15,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-18 21:13:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:13:16,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 21:13:16,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:13:16,082 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 21:13:16,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:13:16,193 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 21:13:16,194 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:13:16,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465298733] [2021-12-18 21:13:16,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1465298733] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:13:16,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:13:16,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-18 21:13:16,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087393465] [2021-12-18 21:13:16,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:13:16,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 21:13:16,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:13:16,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 21:13:16,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:13:16,195 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 21:13:16,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:13:16,299 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2021-12-18 21:13:16,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:13:16,299 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 36 [2021-12-18 21:13:16,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:13:16,300 INFO L225 Difference]: With dead ends: 101 [2021-12-18 21:13:16,300 INFO L226 Difference]: Without dead ends: 101 [2021-12-18 21:13:16,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-18 21:13:16,300 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 61 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:13:16,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 169 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:13:16,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-18 21:13:16,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2021-12-18 21:13:16,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 80 states have internal predecessors, (87), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-18 21:13:16,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2021-12-18 21:13:16,303 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 36 [2021-12-18 21:13:16,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:13:16,303 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2021-12-18 21:13:16,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 21:13:16,303 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2021-12-18 21:13:16,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-18 21:13:16,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:13:16,303 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:13:16,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-18 21:13:16,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:13:16,510 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:13:16,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:13:16,510 INFO L85 PathProgramCache]: Analyzing trace with hash -159020851, now seen corresponding path program 2 times [2021-12-18 21:13:16,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:13:16,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905605112] [2021-12-18 21:13:16,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:13:16,511 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:13:16,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:13:16,512 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) [2021-12-18 21:13:16,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-18 21:13:16,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:13:16,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:13:16,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-18 21:13:16,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:13:16,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:13:16,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:13:16,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:13:16,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:13:16,796 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:13:16,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:13:16,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:13:16,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:13:16,967 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:13:16,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:13:19,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:13:19,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:13:19,155 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:13:19,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:13:19,196 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 21:13:19,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:13:19,654 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:13:19,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905605112] [2021-12-18 21:13:19,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905605112] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:13:19,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1145368180] [2021-12-18 21:13:19,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:13:19,654 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:13:19,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:13:19,655 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:13:19,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-12-18 21:13:19,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:13:19,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:13:19,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-18 21:13:19,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:13:19,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:13:19,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:13:19,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:13:19,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:13:19,933 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:13:19,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:13:20,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:13:20,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:13:20,074 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:13:20,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:13:22,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:13:22,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:13:22,229 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:13:22,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:13:22,244 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 21:13:22,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:13:22,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1145368180] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:13:22,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:13:22,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-12-18 21:13:22,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469488157] [2021-12-18 21:13:22,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:13:22,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 21:13:22,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:13:22,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 21:13:22,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-18 21:13:22,542 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:13:22,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:13:22,938 INFO L93 Difference]: Finished difference Result 127 states and 134 transitions. [2021-12-18 21:13:22,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 21:13:22,939 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2021-12-18 21:13:22,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:13:22,939 INFO L225 Difference]: With dead ends: 127 [2021-12-18 21:13:22,939 INFO L226 Difference]: Without dead ends: 127 [2021-12-18 21:13:22,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 10 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-12-18 21:13:22,940 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 56 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:13:22,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 363 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 392 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2021-12-18 21:13:22,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-18 21:13:22,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 107. [2021-12-18 21:13:22,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 87 states have (on average 1.2413793103448276) internal successors, (108), 94 states have internal predecessors, (108), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-18 21:13:22,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 121 transitions. [2021-12-18 21:13:22,942 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 121 transitions. Word has length 38 [2021-12-18 21:13:22,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:13:22,943 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 121 transitions. [2021-12-18 21:13:22,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:13:22,943 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 121 transitions. [2021-12-18 21:13:22,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-18 21:13:22,943 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:13:22,943 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 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] [2021-12-18 21:13:22,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-12-18 21:13:23,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-12-18 21:13:23,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:13:23,353 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:13:23,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:13:23,353 INFO L85 PathProgramCache]: Analyzing trace with hash 2060951864, now seen corresponding path program 1 times [2021-12-18 21:13:23,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:13:23,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114413305] [2021-12-18 21:13:23,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:13:23,354 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:13:23,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:13:23,392 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) [2021-12-18 21:13:23,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-18 21:13:23,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:13:23,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-18 21:13:23,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:13:23,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:13:23,582 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:13:23,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-18 21:13:23,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:13:23,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-18 21:13:27,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-18 21:13:27,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 21:13:27,908 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:13:27,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:13:28,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2021-12-18 21:13:28,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-12-18 21:13:28,466 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:13:28,466 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:13:28,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114413305] [2021-12-18 21:13:28,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114413305] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:13:28,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:13:28,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-12-18 21:13:28,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338263580] [2021-12-18 21:13:28,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:13:28,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-18 21:13:28,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:13:28,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-18 21:13:28,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=523, Unknown=1, NotChecked=0, Total=600 [2021-12-18 21:13:28,468 INFO L87 Difference]: Start difference. First operand 107 states and 121 transitions. Second operand has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 21 states have internal predecessors, (53), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:13:29,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:13:29,564 INFO L93 Difference]: Finished difference Result 135 states and 153 transitions. [2021-12-18 21:13:29,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-18 21:13:29,564 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 21 states have internal predecessors, (53), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 38 [2021-12-18 21:13:29,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:13:29,565 INFO L225 Difference]: With dead ends: 135 [2021-12-18 21:13:29,565 INFO L226 Difference]: Without dead ends: 135 [2021-12-18 21:13:29,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=158, Invalid=1173, Unknown=1, NotChecked=0, Total=1332 [2021-12-18 21:13:29,566 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 75 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 21:13:29,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 296 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 629 Invalid, 0 Unknown, 124 Unchecked, 0.6s Time] [2021-12-18 21:13:29,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-18 21:13:29,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 113. [2021-12-18 21:13:29,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 93 states have (on average 1.2688172043010753) internal successors, (118), 100 states have internal predecessors, (118), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-18 21:13:29,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 131 transitions. [2021-12-18 21:13:29,568 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 131 transitions. Word has length 38 [2021-12-18 21:13:29,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:13:29,568 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 131 transitions. [2021-12-18 21:13:29,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 21 states have internal predecessors, (53), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-18 21:13:29,569 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 131 transitions. [2021-12-18 21:13:29,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-18 21:13:29,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:13:29,569 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 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, 1] [2021-12-18 21:13:29,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-12-18 21:13:29,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:13:29,776 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:13:29,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:13:29,777 INFO L85 PathProgramCache]: Analyzing trace with hash 594821051, now seen corresponding path program 1 times [2021-12-18 21:13:29,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:13:29,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1029726400] [2021-12-18 21:13:29,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:13:29,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:13:29,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:13:29,778 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) [2021-12-18 21:13:29,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-18 21:13:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:13:29,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-18 21:13:29,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:13:30,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:13:30,244 INFO L354 Elim1Store]: treesize reduction 6, result has 50.0 percent of original size [2021-12-18 21:13:30,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 34 [2021-12-18 21:13:30,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-12-18 21:13:41,580 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 21:13:41,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:13:48,232 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:13:48,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1029726400] [2021-12-18 21:13:48,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1029726400] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:13:48,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [668837455] [2021-12-18 21:13:48,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:13:48,237 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:13:48,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:13:48,238 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:13:48,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-12-18 21:13:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:13:48,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-18 21:13:48,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:13:50,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:13:51,176 INFO L354 Elim1Store]: treesize reduction 19, result has 24.0 percent of original size [2021-12-18 21:13:51,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 37 [2021-12-18 21:13:51,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-12-18 21:13:57,064 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 21:13:57,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:13:58,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [668837455] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:13:58,534 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:13:58,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 29 [2021-12-18 21:13:58,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576476786] [2021-12-18 21:13:58,535 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:13:58,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-18 21:13:58,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:13:58,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-18 21:13:58,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1335, Unknown=7, NotChecked=0, Total=1482 [2021-12-18 21:13:58,536 INFO L87 Difference]: Start difference. First operand 113 states and 131 transitions. Second operand has 30 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 21:13:58,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:13:58,632 INFO L93 Difference]: Finished difference Result 118 states and 135 transitions. [2021-12-18 21:13:58,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 21:13:58,633 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2021-12-18 21:13:58,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:13:58,633 INFO L225 Difference]: With dead ends: 118 [2021-12-18 21:13:58,633 INFO L226 Difference]: Without dead ends: 101 [2021-12-18 21:13:58,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=149, Invalid=1484, Unknown=7, NotChecked=0, Total=1640 [2021-12-18 21:13:58,634 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 319 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:13:58,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 277 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 319 Unchecked, 0.0s Time] [2021-12-18 21:13:58,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-18 21:13:58,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-12-18 21:13:58,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 82 states have (on average 1.2926829268292683) internal successors, (106), 89 states have internal predecessors, (106), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-18 21:13:58,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 118 transitions. [2021-12-18 21:13:58,636 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 118 transitions. Word has length 40 [2021-12-18 21:13:58,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:13:58,637 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 118 transitions. [2021-12-18 21:13:58,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 21:13:58,637 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 118 transitions. [2021-12-18 21:13:58,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-18 21:13:58,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:13:58,637 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:13:58,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-12-18 21:13:58,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-12-18 21:13:59,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:13:59,046 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:13:59,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:13:59,047 INFO L85 PathProgramCache]: Analyzing trace with hash -419710261, now seen corresponding path program 1 times [2021-12-18 21:13:59,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:13:59,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203564270] [2021-12-18 21:13:59,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:13:59,047 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:13:59,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:13:59,049 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) [2021-12-18 21:13:59,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-18 21:13:59,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:13:59,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 21:13:59,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:13:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-18 21:13:59,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:13:59,327 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-18 21:13:59,327 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:13:59,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203564270] [2021-12-18 21:13:59,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203564270] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:13:59,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:13:59,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-18 21:13:59,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897292744] [2021-12-18 21:13:59,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:13:59,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 21:13:59,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:13:59,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 21:13:59,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:13:59,330 INFO L87 Difference]: Start difference. First operand 101 states and 118 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-18 21:13:59,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:13:59,539 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2021-12-18 21:13:59,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 21:13:59,540 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 44 [2021-12-18 21:13:59,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:13:59,541 INFO L225 Difference]: With dead ends: 114 [2021-12-18 21:13:59,541 INFO L226 Difference]: Without dead ends: 114 [2021-12-18 21:13:59,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-18 21:13:59,542 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 151 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:13:59,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 207 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:13:59,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-18 21:13:59,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 100. [2021-12-18 21:13:59,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 81 states have (on average 1.2592592592592593) internal successors, (102), 88 states have internal predecessors, (102), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-18 21:13:59,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2021-12-18 21:13:59,547 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 44 [2021-12-18 21:13:59,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:13:59,549 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2021-12-18 21:13:59,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-18 21:13:59,549 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2021-12-18 21:13:59,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-18 21:13:59,549 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:13:59,550 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:13:59,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-12-18 21:13:59,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:13:59,751 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:13:59,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:13:59,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1236217923, now seen corresponding path program 1 times [2021-12-18 21:13:59,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:13:59,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352047201] [2021-12-18 21:13:59,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:13:59,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:13:59,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:13:59,754 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) [2021-12-18 21:13:59,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-18 21:13:59,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:13:59,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-18 21:13:59,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:14:00,046 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:14:00,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:14:00,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-18 21:14:01,653 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:14:01,654 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:14:01,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352047201] [2021-12-18 21:14:01,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352047201] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:14:01,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:14:01,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-12-18 21:14:01,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649333256] [2021-12-18 21:14:01,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:14:01,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 21:14:01,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:14:01,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 21:14:01,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-12-18 21:14:01,655 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand has 18 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:14:07,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:14:07,248 INFO L93 Difference]: Finished difference Result 208 states and 217 transitions. [2021-12-18 21:14:07,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 21:14:07,249 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 46 [2021-12-18 21:14:07,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:14:07,250 INFO L225 Difference]: With dead ends: 208 [2021-12-18 21:14:07,250 INFO L226 Difference]: Without dead ends: 208 [2021-12-18 21:14:07,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 21:14:07,251 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 331 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-18 21:14:07,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 396 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-18 21:14:07,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-18 21:14:07,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 100. [2021-12-18 21:14:07,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 88 states have internal predecessors, (100), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-18 21:14:07,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 112 transitions. [2021-12-18 21:14:07,254 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 112 transitions. Word has length 46 [2021-12-18 21:14:07,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:14:07,254 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 112 transitions. [2021-12-18 21:14:07,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:14:07,254 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 112 transitions. [2021-12-18 21:14:07,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-18 21:14:07,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:14:07,254 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:14:07,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-12-18 21:14:07,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:14:07,455 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:14:07,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:14:07,455 INFO L85 PathProgramCache]: Analyzing trace with hash -519500702, now seen corresponding path program 3 times [2021-12-18 21:14:07,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:14:07,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355800355] [2021-12-18 21:14:07,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 21:14:07,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:14:07,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:14:07,456 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) [2021-12-18 21:14:07,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-18 21:14:07,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-18 21:14:07,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:14:07,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-18 21:14:07,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:14:07,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:14:11,794 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:14:11,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 21:14:18,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:14:18,150 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-18 21:14:18,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 30 [2021-12-18 21:14:18,160 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:14:18,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-18 21:14:20,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:14:20,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:14:20,451 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:14:20,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-18 21:14:24,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:14:24,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:14:24,662 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:14:24,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-18 21:14:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 21:14:24,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:14:27,260 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:14:27,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355800355] [2021-12-18 21:14:27,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1355800355] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:14:27,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [989171104] [2021-12-18 21:14:27,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 21:14:27,261 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:14:27,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:14:27,262 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:14:27,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-12-18 21:14:27,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-18 21:14:27,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:14:27,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-18 21:14:27,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:14:27,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:14:27,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:14:27,852 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:14:27,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:14:27,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:14:28,182 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:14:28,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 21:14:28,200 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:14:28,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-18 21:14:30,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:14:30,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:14:30,529 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:14:30,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-18 21:14:30,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:14:30,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:14:30,692 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:14:30,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-18 21:14:30,713 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-18 21:14:30,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:14:33,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [989171104] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:14:33,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:14:33,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 28 [2021-12-18 21:14:33,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639152910] [2021-12-18 21:14:33,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:14:33,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-18 21:14:33,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:14:33,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-18 21:14:33,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=832, Unknown=5, NotChecked=0, Total=930 [2021-12-18 21:14:33,328 INFO L87 Difference]: Start difference. First operand 100 states and 112 transitions. Second operand has 29 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 24 states have internal predecessors, (47), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:14:36,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:14:36,149 INFO L93 Difference]: Finished difference Result 148 states and 157 transitions. [2021-12-18 21:14:36,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 21:14:36,149 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 24 states have internal predecessors, (47), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 48 [2021-12-18 21:14:36,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:14:36,150 INFO L225 Difference]: With dead ends: 148 [2021-12-18 21:14:36,150 INFO L226 Difference]: Without dead ends: 148 [2021-12-18 21:14:36,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 65 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=141, Invalid=1259, Unknown=6, NotChecked=0, Total=1406 [2021-12-18 21:14:36,151 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 64 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:14:36,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 588 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 628 Invalid, 0 Unknown, 256 Unchecked, 0.5s Time] [2021-12-18 21:14:36,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-18 21:14:36,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 115. [2021-12-18 21:14:36,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 101 states have internal predecessors, (115), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-18 21:14:36,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 130 transitions. [2021-12-18 21:14:36,153 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 130 transitions. Word has length 48 [2021-12-18 21:14:36,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:14:36,154 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 130 transitions. [2021-12-18 21:14:36,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 24 states have internal predecessors, (47), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:14:36,154 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 130 transitions. [2021-12-18 21:14:36,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-18 21:14:36,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:14:36,155 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:14:36,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-12-18 21:14:36,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-12-18 21:14:36,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 21:14:36,555 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:14:36,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:14:36,556 INFO L85 PathProgramCache]: Analyzing trace with hash 331950041, now seen corresponding path program 1 times [2021-12-18 21:14:36,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:14:36,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1240145772] [2021-12-18 21:14:36,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:14:36,556 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:14:36,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:14:36,558 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:14:36,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-18 21:14:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:14:36,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 21:14:36,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:14:36,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:14:36,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:14:36,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-12-18 21:14:37,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:14:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 21:14:37,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:14:39,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-18 21:14:39,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2021-12-18 21:14:39,416 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:14:39,416 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:14:39,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1240145772] [2021-12-18 21:14:39,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1240145772] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:14:39,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:14:39,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-12-18 21:14:39,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575301338] [2021-12-18 21:14:39,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:14:39,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 21:14:39,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:14:39,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 21:14:39,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-12-18 21:14:39,417 INFO L87 Difference]: Start difference. First operand 115 states and 130 transitions. Second operand has 21 states, 20 states have (on average 3.05) internal successors, (61), 18 states have internal predecessors, (61), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-18 21:14:41,595 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 21:14:42,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:14:42,052 INFO L93 Difference]: Finished difference Result 142 states and 156 transitions. [2021-12-18 21:14:42,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-18 21:14:42,052 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.05) internal successors, (61), 18 states have internal predecessors, (61), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 47 [2021-12-18 21:14:42,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:14:42,053 INFO L225 Difference]: With dead ends: 142 [2021-12-18 21:14:42,053 INFO L226 Difference]: Without dead ends: 142 [2021-12-18 21:14:42,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-12-18 21:14:42,054 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 150 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-18 21:14:42,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 322 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 469 Invalid, 0 Unknown, 46 Unchecked, 1.8s Time] [2021-12-18 21:14:42,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-18 21:14:42,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 123. [2021-12-18 21:14:42,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 101 states have (on average 1.2079207920792079) internal successors, (122), 108 states have internal predecessors, (122), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-18 21:14:42,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 137 transitions. [2021-12-18 21:14:42,056 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 137 transitions. Word has length 47 [2021-12-18 21:14:42,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:14:42,056 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 137 transitions. [2021-12-18 21:14:42,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.05) internal successors, (61), 18 states have internal predecessors, (61), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-18 21:14:42,057 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 137 transitions. [2021-12-18 21:14:42,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-18 21:14:42,057 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:14:42,057 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:14:42,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-12-18 21:14:42,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:14:42,257 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:14:42,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:14:42,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1700516764, now seen corresponding path program 1 times [2021-12-18 21:14:42,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:14:42,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1466900125] [2021-12-18 21:14:42,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:14:42,258 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:14:42,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:14:42,259 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:14:42,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-12-18 21:14:42,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:14:42,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 21:14:42,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:14:42,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:14:42,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:14:42,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-18 21:14:42,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:14:42,907 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 21:14:42,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:14:45,469 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 21:14:45,469 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:14:45,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1466900125] [2021-12-18 21:14:45,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1466900125] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:14:45,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:14:45,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-12-18 21:14:45,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943577720] [2021-12-18 21:14:45,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:14:45,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-18 21:14:45,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:14:45,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-18 21:14:45,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-12-18 21:14:45,471 INFO L87 Difference]: Start difference. First operand 123 states and 137 transitions. Second operand has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 19 states have internal predecessors, (64), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-18 21:14:48,963 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 21:14:50,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:14:50,053 INFO L93 Difference]: Finished difference Result 161 states and 173 transitions. [2021-12-18 21:14:50,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-18 21:14:50,053 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 19 states have internal predecessors, (64), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 48 [2021-12-18 21:14:50,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:14:50,054 INFO L225 Difference]: With dead ends: 161 [2021-12-18 21:14:50,054 INFO L226 Difference]: Without dead ends: 161 [2021-12-18 21:14:50,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=320, Invalid=1936, Unknown=0, NotChecked=0, Total=2256 [2021-12-18 21:14:50,055 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 219 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 53 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:14:50,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 280 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 648 Invalid, 1 Unknown, 69 Unchecked, 3.0s Time] [2021-12-18 21:14:50,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-18 21:14:50,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 125. [2021-12-18 21:14:50,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 103 states have (on average 1.203883495145631) internal successors, (124), 110 states have internal predecessors, (124), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-18 21:14:50,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 139 transitions. [2021-12-18 21:14:50,058 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 139 transitions. Word has length 48 [2021-12-18 21:14:50,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:14:50,058 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 139 transitions. [2021-12-18 21:14:50,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 19 states have internal predecessors, (64), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-18 21:14:50,058 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 139 transitions. [2021-12-18 21:14:50,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-18 21:14:50,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:14:50,058 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:14:50,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-12-18 21:14:50,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:14:50,266 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:14:50,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:14:50,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1176412219, now seen corresponding path program 1 times [2021-12-18 21:14:50,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:14:50,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2107640193] [2021-12-18 21:14:50,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:14:50,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:14:50,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:14:50,268 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:14:50,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-12-18 21:14:50,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:14:50,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-18 21:14:50,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:14:50,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:14:50,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:14:50,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-12-18 21:14:50,589 INFO L354 Elim1Store]: treesize reduction 42, result has 42.5 percent of original size [2021-12-18 21:14:50,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 45 [2021-12-18 21:14:50,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:14:50,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-12-18 21:14:50,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-18 21:14:51,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:14:51,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-12-18 21:14:51,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:14:51,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-12-18 21:14:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:14:51,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:14:51,838 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:14:51,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2107640193] [2021-12-18 21:14:51,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2107640193] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:14:51,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1285630043] [2021-12-18 21:14:51,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:14:51,838 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:14:51,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:14:51,839 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:14:51,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-12-18 21:14:52,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:14:52,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-18 21:14:52,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:14:52,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:14:52,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:14:52,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-12-18 21:14:52,234 INFO L354 Elim1Store]: treesize reduction 42, result has 42.5 percent of original size [2021-12-18 21:14:52,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 45 [2021-12-18 21:14:52,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:14:52,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-12-18 21:14:52,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-18 21:14:52,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:14:52,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-12-18 21:14:52,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:14:52,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-12-18 21:14:52,536 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:14:52,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:14:52,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1285630043] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:14:52,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:14:52,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-12-18 21:14:52,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047223775] [2021-12-18 21:14:52,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:14:52,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 21:14:52,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:14:52,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 21:14:52,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-12-18 21:14:52,876 INFO L87 Difference]: Start difference. First operand 125 states and 139 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 18 states have internal predecessors, (40), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:14:53,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:14:53,737 INFO L93 Difference]: Finished difference Result 129 states and 143 transitions. [2021-12-18 21:14:53,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 21:14:53,737 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 18 states have internal predecessors, (40), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2021-12-18 21:14:53,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:14:53,738 INFO L225 Difference]: With dead ends: 129 [2021-12-18 21:14:53,738 INFO L226 Difference]: Without dead ends: 129 [2021-12-18 21:14:53,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 93 SyntacticMatches, 9 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-12-18 21:14:53,738 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 23 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:14:53,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 326 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 506 Invalid, 0 Unknown, 84 Unchecked, 0.5s Time] [2021-12-18 21:14:53,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-18 21:14:53,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-12-18 21:14:53,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 107 states have (on average 1.1962616822429906) internal successors, (128), 114 states have internal predecessors, (128), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-18 21:14:53,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 143 transitions. [2021-12-18 21:14:53,741 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 143 transitions. Word has length 49 [2021-12-18 21:14:53,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:14:53,741 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 143 transitions. [2021-12-18 21:14:53,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 18 states have internal predecessors, (40), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 21:14:53,741 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 143 transitions. [2021-12-18 21:14:53,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 21:14:53,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:14:53,741 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:14:53,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-12-18 21:14:53,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-12-18 21:14:54,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 21:14:54,142 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:14:54,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:14:54,142 INFO L85 PathProgramCache]: Analyzing trace with hash -486793996, now seen corresponding path program 2 times [2021-12-18 21:14:54,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:14:54,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1325440923] [2021-12-18 21:14:54,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:14:54,143 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:14:54,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:14:54,144 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:14:54,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-12-18 21:14:54,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:14:54,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:14:54,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:14:54,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:14:54,426 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-18 21:14:54,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:14:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-18 21:14:54,674 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:14:54,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1325440923] [2021-12-18 21:14:54,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1325440923] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:14:54,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:14:54,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-18 21:14:54,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170646038] [2021-12-18 21:14:54,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:14:54,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 21:14:54,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:14:54,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 21:14:54,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-12-18 21:14:54,675 INFO L87 Difference]: Start difference. First operand 129 states and 143 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-18 21:14:55,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:14:55,122 INFO L93 Difference]: Finished difference Result 375 states and 402 transitions. [2021-12-18 21:14:55,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 21:14:55,122 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 52 [2021-12-18 21:14:55,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:14:55,124 INFO L225 Difference]: With dead ends: 375 [2021-12-18 21:14:55,124 INFO L226 Difference]: Without dead ends: 375 [2021-12-18 21:14:55,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2021-12-18 21:14:55,125 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 1008 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1009 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:14:55,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1009 Valid, 528 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 21:14:55,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-12-18 21:14:55,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 161. [2021-12-18 21:14:55,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 134 states have (on average 1.1940298507462686) internal successors, (160), 141 states have internal predecessors, (160), 11 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (19), 14 states have call predecessors, (19), 11 states have call successors, (19) [2021-12-18 21:14:55,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 190 transitions. [2021-12-18 21:14:55,131 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 190 transitions. Word has length 52 [2021-12-18 21:14:55,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:14:55,131 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 190 transitions. [2021-12-18 21:14:55,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-18 21:14:55,131 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 190 transitions. [2021-12-18 21:14:55,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 21:14:55,132 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:14:55,132 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:14:55,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-12-18 21:14:55,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:14:55,339 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:14:55,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:14:55,340 INFO L85 PathProgramCache]: Analyzing trace with hash -436631103, now seen corresponding path program 2 times [2021-12-18 21:14:55,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:14:55,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1475562682] [2021-12-18 21:14:55,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:14:55,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:14:55,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:14:55,341 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:14:55,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-12-18 21:14:55,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:14:55,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:14:55,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:14:55,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:14:55,502 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-18 21:14:55,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:14:55,644 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-18 21:14:55,644 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:14:55,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1475562682] [2021-12-18 21:14:55,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1475562682] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:14:55,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:14:55,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-18 21:14:55,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920700436] [2021-12-18 21:14:55,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:14:55,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 21:14:55,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:14:55,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 21:14:55,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-12-18 21:14:55,646 INFO L87 Difference]: Start difference. First operand 161 states and 190 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-18 21:14:55,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:14:55,796 INFO L93 Difference]: Finished difference Result 173 states and 200 transitions. [2021-12-18 21:14:55,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 21:14:55,796 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 52 [2021-12-18 21:14:55,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:14:55,798 INFO L225 Difference]: With dead ends: 173 [2021-12-18 21:14:55,798 INFO L226 Difference]: Without dead ends: 173 [2021-12-18 21:14:55,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-12-18 21:14:55,803 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 47 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:14:55,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 350 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:14:55,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-18 21:14:55,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 163. [2021-12-18 21:14:55,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 136 states have (on average 1.1911764705882353) internal successors, (162), 143 states have internal predecessors, (162), 11 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (19), 14 states have call predecessors, (19), 11 states have call successors, (19) [2021-12-18 21:14:55,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 192 transitions. [2021-12-18 21:14:55,810 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 192 transitions. Word has length 52 [2021-12-18 21:14:55,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:14:55,810 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 192 transitions. [2021-12-18 21:14:55,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-18 21:14:55,810 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 192 transitions. [2021-12-18 21:14:55,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-18 21:14:55,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:14:55,811 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:14:55,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-12-18 21:14:56,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:14:56,019 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:14:56,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:14:56,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1304261010, now seen corresponding path program 2 times [2021-12-18 21:14:56,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:14:56,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60374855] [2021-12-18 21:14:56,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:14:56,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:14:56,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:14:56,027 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:14:56,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-12-18 21:14:56,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:14:56,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:14:56,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-18 21:14:56,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:14:56,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:14:56,199 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:14:56,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:14:56,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:14:58,279 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_63| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_56| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_56| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_56|) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_63|)))) is different from true [2021-12-18 21:14:58,333 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-18 21:14:58,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-18 21:15:00,366 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_64| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_57| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_57| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_57|) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_64|)))) is different from true [2021-12-18 21:15:00,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:15:00,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-18 21:15:00,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:15:00,543 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 16 not checked. [2021-12-18 21:15:00,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:15:00,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 112 [2021-12-18 21:15:01,270 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 21:15:01,271 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:15:01,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60374855] [2021-12-18 21:15:01,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60374855] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:15:01,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:15:01,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2021-12-18 21:15:01,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096270946] [2021-12-18 21:15:01,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:15:01,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-18 21:15:01,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:15:01,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-18 21:15:01,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=636, Unknown=2, NotChecked=102, Total=812 [2021-12-18 21:15:01,273 INFO L87 Difference]: Start difference. First operand 163 states and 192 transitions. Second operand has 29 states, 28 states have (on average 2.892857142857143) internal successors, (81), 26 states have internal predecessors, (81), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-18 21:15:16,101 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 21:15:17,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:15:17,541 INFO L93 Difference]: Finished difference Result 182 states and 216 transitions. [2021-12-18 21:15:17,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-18 21:15:17,542 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.892857142857143) internal successors, (81), 26 states have internal predecessors, (81), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 54 [2021-12-18 21:15:17,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:15:17,543 INFO L225 Difference]: With dead ends: 182 [2021-12-18 21:15:17,543 INFO L226 Difference]: Without dead ends: 182 [2021-12-18 21:15:17,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 75 SyntacticMatches, 9 SemanticMatches, 53 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=266, Invalid=2494, Unknown=4, NotChecked=206, Total=2970 [2021-12-18 21:15:17,543 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 90 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 348 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-18 21:15:17,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 415 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 683 Invalid, 1 Unknown, 348 Unchecked, 2.8s Time] [2021-12-18 21:15:17,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-18 21:15:17,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 169. [2021-12-18 21:15:17,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 142 states have (on average 1.2112676056338028) internal successors, (172), 149 states have internal predecessors, (172), 11 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (19), 14 states have call predecessors, (19), 11 states have call successors, (19) [2021-12-18 21:15:17,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 202 transitions. [2021-12-18 21:15:17,547 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 202 transitions. Word has length 54 [2021-12-18 21:15:17,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:15:17,547 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 202 transitions. [2021-12-18 21:15:17,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.892857142857143) internal successors, (81), 26 states have internal predecessors, (81), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-18 21:15:17,547 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 202 transitions. [2021-12-18 21:15:17,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-18 21:15:17,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:15:17,547 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:15:17,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-12-18 21:15:17,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:15:17,748 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:15:17,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:15:17,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1952504247, now seen corresponding path program 4 times [2021-12-18 21:15:17,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:15:17,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1153089365] [2021-12-18 21:15:17,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 21:15:17,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:15:17,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:15:17,749 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:15:17,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-12-18 21:15:17,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 21:15:17,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:15:17,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-18 21:15:17,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:15:17,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:15:17,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:15:18,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:15:18,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:15:18,125 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:15:18,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:15:18,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:15:18,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:15:18,312 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:15:18,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:15:20,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:15:20,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:15:20,512 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:15:20,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:15:20,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:15:20,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:15:20,734 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:15:20,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:15:20,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:15:20,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:15:20,959 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:15:20,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:15:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 5 proven. 71 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-18 21:15:21,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:15:21,561 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:15:21,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1153089365] [2021-12-18 21:15:21,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1153089365] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:15:21,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1265954867] [2021-12-18 21:15:21,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 21:15:21,561 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:15:21,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:15:21,562 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:15:21,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-12-18 21:15:21,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 21:15:21,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:15:21,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-18 21:15:21,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:15:21,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:15:21,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:15:23,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:15:23,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:15:23,943 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:15:23,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:15:24,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:15:24,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:15:24,096 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:15:24,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:15:24,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:15:24,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:15:24,253 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:15:24,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:15:24,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:15:24,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:15:24,416 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:15:24,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:15:24,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:15:24,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:15:24,577 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:15:24,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:15:24,597 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 5 proven. 71 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-18 21:15:24,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:15:26,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1265954867] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:15:26,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:15:26,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-12-18 21:15:26,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895831010] [2021-12-18 21:15:26,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:15:26,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 21:15:26,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:15:26,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 21:15:26,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-12-18 21:15:27,000 INFO L87 Difference]: Start difference. First operand 169 states and 202 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 21:15:27,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:15:27,712 INFO L93 Difference]: Finished difference Result 225 states and 253 transitions. [2021-12-18 21:15:27,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 21:15:27,713 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 58 [2021-12-18 21:15:27,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:15:27,713 INFO L225 Difference]: With dead ends: 225 [2021-12-18 21:15:27,713 INFO L226 Difference]: Without dead ends: 225 [2021-12-18 21:15:27,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 86 SyntacticMatches, 18 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-12-18 21:15:27,714 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 90 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 21:15:27,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 656 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 751 Invalid, 0 Unknown, 63 Unchecked, 0.6s Time] [2021-12-18 21:15:27,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-12-18 21:15:27,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 169. [2021-12-18 21:15:27,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 142 states have (on average 1.204225352112676) internal successors, (171), 149 states have internal predecessors, (171), 11 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (19), 14 states have call predecessors, (19), 11 states have call successors, (19) [2021-12-18 21:15:27,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 201 transitions. [2021-12-18 21:15:27,718 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 201 transitions. Word has length 58 [2021-12-18 21:15:27,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:15:27,718 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 201 transitions. [2021-12-18 21:15:27,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 21:15:27,718 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 201 transitions. [2021-12-18 21:15:27,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-18 21:15:27,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:15:27,719 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:15:27,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-12-18 21:15:27,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2021-12-18 21:15:28,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 21:15:28,119 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:15:28,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:15:28,120 INFO L85 PathProgramCache]: Analyzing trace with hash -735616619, now seen corresponding path program 2 times [2021-12-18 21:15:28,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:15:28,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086112018] [2021-12-18 21:15:28,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:15:28,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:15:28,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:15:28,121 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:15:28,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-12-18 21:15:28,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:15:28,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:15:28,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-18 21:15:28,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:15:28,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:15:28,656 INFO L354 Elim1Store]: treesize reduction 6, result has 50.0 percent of original size [2021-12-18 21:15:28,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 34 [2021-12-18 21:15:29,092 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-18 21:15:29,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 59 [2021-12-18 21:15:29,396 INFO L354 Elim1Store]: treesize reduction 32, result has 28.9 percent of original size [2021-12-18 21:15:29,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 254 treesize of output 242 [2021-12-18 21:15:30,461 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-18 21:15:30,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 39 [2021-12-18 21:15:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:15:44,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:15:47,662 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:15:47,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086112018] [2021-12-18 21:15:47,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086112018] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:15:47,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1598893039] [2021-12-18 21:15:47,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:15:47,663 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:15:47,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:15:47,664 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:15:47,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-12-18 21:15:47,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:15:47,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:15:47,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-18 21:15:47,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:15:52,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:15:53,167 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-12-18 21:15:53,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 31 [2021-12-18 21:16:14,140 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-18 21:16:14,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 55 [2021-12-18 21:16:14,666 INFO L354 Elim1Store]: treesize reduction 78, result has 1.3 percent of original size [2021-12-18 21:16:14,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 143 treesize of output 125 [2021-12-18 21:16:16,631 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-18 21:16:16,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 35 [2021-12-18 21:16:22,320 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 21:16:22,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:16:24,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1598893039] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:16:24,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:16:24,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2021-12-18 21:16:24,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405359602] [2021-12-18 21:16:24,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:16:24,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-18 21:16:24,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:16:24,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-18 21:16:24,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=3577, Unknown=14, NotChecked=0, Total=3782 [2021-12-18 21:16:24,443 INFO L87 Difference]: Start difference. First operand 169 states and 201 transitions. Second operand has 48 states, 45 states have (on average 2.0) internal successors, (90), 42 states have internal predecessors, (90), 8 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-18 21:16:40,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:16:40,851 INFO L93 Difference]: Finished difference Result 174 states and 205 transitions. [2021-12-18 21:16:40,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 21:16:40,851 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 2.0) internal successors, (90), 42 states have internal predecessors, (90), 8 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 56 [2021-12-18 21:16:40,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:16:40,852 INFO L225 Difference]: With dead ends: 174 [2021-12-18 21:16:40,852 INFO L226 Difference]: Without dead ends: 151 [2021-12-18 21:16:40,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 88 SyntacticMatches, 8 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 63.7s TimeCoverageRelationStatistics Valid=284, Invalid=5707, Unknown=15, NotChecked=0, Total=6006 [2021-12-18 21:16:40,854 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 557 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:16:40,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 642 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 557 Unchecked, 0.0s Time] [2021-12-18 21:16:40,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-18 21:16:40,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-12-18 21:16:40,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 125 states have (on average 1.224) internal successors, (153), 132 states have internal predecessors, (153), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (18), 13 states have call predecessors, (18), 11 states have call successors, (18) [2021-12-18 21:16:40,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 182 transitions. [2021-12-18 21:16:40,857 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 182 transitions. Word has length 56 [2021-12-18 21:16:40,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:16:40,858 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 182 transitions. [2021-12-18 21:16:40,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 2.0) internal successors, (90), 42 states have internal predecessors, (90), 8 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-18 21:16:40,858 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 182 transitions. [2021-12-18 21:16:40,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-18 21:16:40,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:16:40,859 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:16:40,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2021-12-18 21:16:41,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-12-18 21:16:41,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 21:16:41,270 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:16:41,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:16:41,270 INFO L85 PathProgramCache]: Analyzing trace with hash 499154310, now seen corresponding path program 2 times [2021-12-18 21:16:41,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:16:41,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1741951706] [2021-12-18 21:16:41,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:16:41,270 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:16:41,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:16:41,272 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:16:41,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-12-18 21:16:41,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:16:41,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:16:41,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-18 21:16:41,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:16:41,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:16:41,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:16:41,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-12-18 21:16:41,729 INFO L354 Elim1Store]: treesize reduction 42, result has 42.5 percent of original size [2021-12-18 21:16:41,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 45 [2021-12-18 21:16:41,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:16:41,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-12-18 21:16:42,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-18 21:16:42,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:16:42,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-12-18 21:16:42,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:16:42,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-12-18 21:16:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 21:16:42,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:16:43,152 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:16:43,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1741951706] [2021-12-18 21:16:43,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1741951706] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:16:43,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1662555028] [2021-12-18 21:16:43,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:16:43,160 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:16:43,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:16:43,161 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:16:43,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-12-18 21:16:43,344 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 21:16:43,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19651589] [2021-12-18 21:16:43,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:16:43,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:16:43,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:16:43,349 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 21:16:43,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 1 [2021-12-18 21:16:43,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-18 21:16:43,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:16:43,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:16:43,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-18 21:16:43,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:16:43,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:16:43,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:16:44,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-12-18 21:16:44,134 INFO L354 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2021-12-18 21:16:44,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 39 [2021-12-18 21:16:44,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:16:44,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 34 [2021-12-18 21:16:44,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-18 21:16:44,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:16:44,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-12-18 21:16:44,783 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:16:44,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-12-18 21:16:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 21:16:44,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:16:45,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19651589] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:16:45,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:16:45,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 33 [2021-12-18 21:16:45,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836396577] [2021-12-18 21:16:45,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:16:45,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-18 21:16:45,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:16:45,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-18 21:16:45,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1810, Unknown=0, NotChecked=0, Total=1980 [2021-12-18 21:16:45,686 INFO L87 Difference]: Start difference. First operand 151 states and 182 transitions. Second operand has 34 states, 32 states have (on average 2.0625) internal successors, (66), 28 states have internal predecessors, (66), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-18 21:16:46,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:16:46,625 INFO L93 Difference]: Finished difference Result 169 states and 200 transitions. [2021-12-18 21:16:46,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 21:16:46,626 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.0625) internal successors, (66), 28 states have internal predecessors, (66), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 59 [2021-12-18 21:16:46,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:16:46,627 INFO L225 Difference]: With dead ends: 169 [2021-12-18 21:16:46,627 INFO L226 Difference]: Without dead ends: 169 [2021-12-18 21:16:46,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 98 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=242, Invalid=2514, Unknown=0, NotChecked=0, Total=2756 [2021-12-18 21:16:46,628 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 36 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 21:16:46,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 448 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 629 Invalid, 0 Unknown, 156 Unchecked, 0.6s Time] [2021-12-18 21:16:46,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-18 21:16:46,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-12-18 21:16:46,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 142 states have (on average 1.204225352112676) internal successors, (171), 148 states have internal predecessors, (171), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2021-12-18 21:16:46,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 200 transitions. [2021-12-18 21:16:46,634 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 200 transitions. Word has length 59 [2021-12-18 21:16:46,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:16:46,635 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 200 transitions. [2021-12-18 21:16:46,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.0625) internal successors, (66), 28 states have internal predecessors, (66), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-18 21:16:46,635 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 200 transitions. [2021-12-18 21:16:46,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-18 21:16:46,635 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:16:46,636 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:16:46,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-12-18 21:16:46,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-12-18 21:16:47,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:16:47,048 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:16:47,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:16:47,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1129358486, now seen corresponding path program 3 times [2021-12-18 21:16:47,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:16:47,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103898164] [2021-12-18 21:16:47,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 21:16:47,048 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:16:47,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:16:47,049 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:16:47,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-12-18 21:16:47,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 21:16:47,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:16:47,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-18 21:16:47,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:16:47,329 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:16:47,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-18 21:16:47,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:16:49,499 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_82| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_119| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_89| (_ BitVec 32))) (and (bvslt |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_119| (_ bv10 32)) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_82| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_82|) (bvadd (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_119| (_ bv4 32)) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_89| (_ bv4294967292 32))))))) is different from true [2021-12-18 21:16:53,671 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-18 21:16:53,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-18 21:16:55,832 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_83| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_90| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_120| (_ BitVec 32))) (and (bvslt (bvadd |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_120| (_ bv4294967295 32)) (_ bv10 32)) (bvslt |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_120| (_ bv10 32)) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_83| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_83|) (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_90| (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_120| (_ bv4 32)) (_ bv4294967288 32))))))) is different from true [2021-12-18 21:16:56,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2021-12-18 21:16:56,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:16:56,709 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 35 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 12 not checked. [2021-12-18 21:16:56,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:16:56,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2021-12-18 21:16:59,208 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:16:59,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103898164] [2021-12-18 21:16:59,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [103898164] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:16:59,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [711736777] [2021-12-18 21:16:59,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 21:16:59,208 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:16:59,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:16:59,210 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:16:59,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2021-12-18 21:16:59,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 21:16:59,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:16:59,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 21:16:59,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:16:59,578 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:16:59,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-18 21:16:59,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:17:02,206 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_124| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_93| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_87| (_ BitVec 32))) (and (bvslt |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_124| (_ bv10 32)) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_87| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_87|) (bvadd (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_124| (_ bv4 32)) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_93| (_ bv4294967292 32))))) (bvslt (bvadd |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_124| (_ bv4294967295 32)) (_ bv10 32)))) is different from true [2021-12-18 21:17:10,213 INFO L354 Elim1Store]: treesize reduction 91, result has 31.6 percent of original size [2021-12-18 21:17:10,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 61 [2021-12-18 21:17:12,908 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_94| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_125| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_88| (_ BitVec 32))) (and (bvslt (bvadd |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_125| (_ bv4294967294 32)) (_ bv10 32)) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_88| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_88|) (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_94| (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_125| (_ bv4 32)) (_ bv4294967288 32))))) (bvslt |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_125| (_ bv10 32)))) is different from true [2021-12-18 21:17:13,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2021-12-18 21:17:13,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:17:13,937 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 35 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 12 not checked. [2021-12-18 21:17:13,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:17:14,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-18 21:17:15,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2021-12-18 21:17:15,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-12-18 21:17:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-18 21:17:16,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [711736777] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:17:16,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 21:17:16,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 17] total 49 [2021-12-18 21:17:16,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904231043] [2021-12-18 21:17:16,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 21:17:16,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-18 21:17:16,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:17:16,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-18 21:17:16,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=3366, Unknown=6, NotChecked=484, Total=4160 [2021-12-18 21:17:16,803 INFO L87 Difference]: Start difference. First operand 169 states and 200 transitions. Second operand has 50 states, 46 states have (on average 2.391304347826087) internal successors, (110), 47 states have internal predecessors, (110), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2021-12-18 21:17:34,834 WARN L227 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 37 DAG size of output: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 21:17:38,661 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 21:18:05,754 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 21:18:12,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:18:12,035 INFO L93 Difference]: Finished difference Result 194 states and 225 transitions. [2021-12-18 21:18:12,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-18 21:18:12,037 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 46 states have (on average 2.391304347826087) internal successors, (110), 47 states have internal predecessors, (110), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 62 [2021-12-18 21:18:12,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:18:12,038 INFO L225 Difference]: With dead ends: 194 [2021-12-18 21:18:12,038 INFO L226 Difference]: Without dead ends: 194 [2021-12-18 21:18:12,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 148 SyntacticMatches, 13 SemanticMatches, 97 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 2864 ImplicationChecksByTransitivity, 72.5s TimeCoverageRelationStatistics Valid=1115, Invalid=7818, Unknown=13, NotChecked=756, Total=9702 [2021-12-18 21:18:12,040 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 427 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 1803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 475 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-18 21:18:12,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 610 Invalid, 1803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1237 Invalid, 0 Unknown, 475 Unchecked, 5.8s Time] [2021-12-18 21:18:12,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-12-18 21:18:12,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 171. [2021-12-18 21:18:12,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 144 states have (on average 1.2152777777777777) internal successors, (175), 150 states have internal predecessors, (175), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2021-12-18 21:18:12,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 204 transitions. [2021-12-18 21:18:12,043 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 204 transitions. Word has length 62 [2021-12-18 21:18:12,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:18:12,044 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 204 transitions. [2021-12-18 21:18:12,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 46 states have (on average 2.391304347826087) internal successors, (110), 47 states have internal predecessors, (110), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2021-12-18 21:18:12,044 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 204 transitions. [2021-12-18 21:18:12,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-18 21:18:12,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:18:12,045 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:18:12,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-12-18 21:18:12,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2021-12-18 21:18:12,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 21:18:12,448 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:18:12,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:18:12,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1129358487, now seen corresponding path program 2 times [2021-12-18 21:18:12,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:18:12,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1367125100] [2021-12-18 21:18:12,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:18:12,448 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:18:12,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:18:12,451 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:18:12,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-12-18 21:18:12,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:18:12,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:18:12,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-18 21:18:12,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:18:12,907 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-18 21:18:12,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:18:13,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-18 21:18:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-18 21:18:16,562 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:18:16,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1367125100] [2021-12-18 21:18:16,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1367125100] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:18:16,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:18:16,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-12-18 21:18:16,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236599085] [2021-12-18 21:18:16,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:18:16,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-18 21:18:16,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:18:16,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-18 21:18:16,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-12-18 21:18:16,563 INFO L87 Difference]: Start difference. First operand 171 states and 204 transitions. Second operand has 23 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 21 states have internal predecessors, (80), 9 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-18 21:18:51,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:18:51,820 INFO L93 Difference]: Finished difference Result 403 states and 430 transitions. [2021-12-18 21:18:51,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-18 21:18:51,821 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 21 states have internal predecessors, (80), 9 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 62 [2021-12-18 21:18:51,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:18:51,822 INFO L225 Difference]: With dead ends: 403 [2021-12-18 21:18:51,822 INFO L226 Difference]: Without dead ends: 403 [2021-12-18 21:18:51,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 31.2s TimeCoverageRelationStatistics Valid=820, Invalid=3212, Unknown=0, NotChecked=0, Total=4032 [2021-12-18 21:18:51,823 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 806 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:18:51,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 639 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2021-12-18 21:18:51,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-12-18 21:18:51,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 209. [2021-12-18 21:18:51,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 182 states have (on average 1.2637362637362637) internal successors, (230), 187 states have internal predecessors, (230), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (18), 15 states have call predecessors, (18), 11 states have call successors, (18) [2021-12-18 21:18:51,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 259 transitions. [2021-12-18 21:18:51,828 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 259 transitions. Word has length 62 [2021-12-18 21:18:51,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:18:51,828 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 259 transitions. [2021-12-18 21:18:51,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 21 states have internal predecessors, (80), 9 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-18 21:18:51,828 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 259 transitions. [2021-12-18 21:18:51,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-18 21:18:51,829 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:18:51,829 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:18:51,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-12-18 21:18:52,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:18:52,037 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:18:52,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:18:52,037 INFO L85 PathProgramCache]: Analyzing trace with hash 650374719, now seen corresponding path program 2 times [2021-12-18 21:18:52,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:18:52,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428681643] [2021-12-18 21:18:52,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:18:52,038 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:18:52,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:18:52,040 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:18:52,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-12-18 21:18:52,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:18:52,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:18:52,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 21:18:52,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:18:52,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:18:52,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:18:52,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-18 21:18:52,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:18:52,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-18 21:18:52,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:18:52,783 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 54 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-18 21:18:52,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:18:53,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-18 21:18:53,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2021-12-18 21:18:53,800 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-18 21:18:53,801 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:18:53,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428681643] [2021-12-18 21:18:53,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [428681643] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:18:53,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:18:53,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-12-18 21:18:53,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598708650] [2021-12-18 21:18:53,802 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:18:53,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-18 21:18:53,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:18:53,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-18 21:18:53,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-12-18 21:18:53,803 INFO L87 Difference]: Start difference. First operand 209 states and 259 transitions. Second operand has 26 states, 25 states have (on average 3.32) internal successors, (83), 23 states have internal predecessors, (83), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-18 21:18:56,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:18:56,760 INFO L93 Difference]: Finished difference Result 231 states and 271 transitions. [2021-12-18 21:18:56,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-18 21:18:56,761 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.32) internal successors, (83), 23 states have internal predecessors, (83), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) Word has length 63 [2021-12-18 21:18:56,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:18:56,762 INFO L225 Difference]: With dead ends: 231 [2021-12-18 21:18:56,762 INFO L226 Difference]: Without dead ends: 231 [2021-12-18 21:18:56,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 101 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=450, Invalid=2972, Unknown=0, NotChecked=0, Total=3422 [2021-12-18 21:18:56,763 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 179 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 21:18:56,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 522 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 741 Invalid, 0 Unknown, 50 Unchecked, 0.9s Time] [2021-12-18 21:18:56,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-12-18 21:18:56,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 213. [2021-12-18 21:18:56,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 185 states have (on average 1.2432432432432432) internal successors, (230), 191 states have internal predecessors, (230), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (18), 15 states have call predecessors, (18), 11 states have call successors, (18) [2021-12-18 21:18:56,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 259 transitions. [2021-12-18 21:18:56,772 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 259 transitions. Word has length 63 [2021-12-18 21:18:56,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:18:56,772 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 259 transitions. [2021-12-18 21:18:56,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.32) internal successors, (83), 23 states have internal predecessors, (83), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-18 21:18:56,772 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 259 transitions. [2021-12-18 21:18:56,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-18 21:18:56,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:18:56,773 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:18:56,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-12-18 21:18:56,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:18:56,980 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:18:56,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:18:56,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1313220106, now seen corresponding path program 2 times [2021-12-18 21:18:56,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:18:56,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068049535] [2021-12-18 21:18:56,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:18:56,981 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:18:56,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:18:56,982 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:18:56,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-12-18 21:18:57,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:18:57,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:18:57,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 21:18:57,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:18:57,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:18:57,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:18:57,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-12-18 21:18:57,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:18:57,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-12-18 21:18:57,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:18:57,945 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 58 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-18 21:18:57,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:18:58,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-18 21:18:59,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2021-12-18 21:18:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-18 21:18:59,136 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:18:59,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068049535] [2021-12-18 21:18:59,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068049535] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:18:59,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:18:59,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2021-12-18 21:18:59,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059610547] [2021-12-18 21:18:59,137 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:18:59,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-18 21:18:59,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:18:59,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-18 21:18:59,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-12-18 21:18:59,137 INFO L87 Difference]: Start difference. First operand 213 states and 259 transitions. Second operand has 27 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 24 states have internal predecessors, (86), 8 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-18 21:19:04,472 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 21:19:06,476 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 21:19:12,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:19:12,265 INFO L93 Difference]: Finished difference Result 277 states and 309 transitions. [2021-12-18 21:19:12,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-18 21:19:12,267 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 24 states have internal predecessors, (86), 8 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) Word has length 64 [2021-12-18 21:19:12,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:19:12,267 INFO L225 Difference]: With dead ends: 277 [2021-12-18 21:19:12,268 INFO L226 Difference]: Without dead ends: 277 [2021-12-18 21:19:12,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 104 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=715, Invalid=3977, Unknown=0, NotChecked=0, Total=4692 [2021-12-18 21:19:12,268 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 367 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 80 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:19:12,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 318 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1004 Invalid, 2 Unknown, 78 Unchecked, 6.4s Time] [2021-12-18 21:19:12,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-12-18 21:19:12,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 216. [2021-12-18 21:19:12,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 188 states have (on average 1.2287234042553192) internal successors, (231), 194 states have internal predecessors, (231), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (18), 15 states have call predecessors, (18), 11 states have call successors, (18) [2021-12-18 21:19:12,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 260 transitions. [2021-12-18 21:19:12,272 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 260 transitions. Word has length 64 [2021-12-18 21:19:12,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:19:12,272 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 260 transitions. [2021-12-18 21:19:12,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 24 states have internal predecessors, (86), 8 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-18 21:19:12,272 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 260 transitions. [2021-12-18 21:19:12,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-18 21:19:12,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:19:12,272 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:19:12,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-12-18 21:19:12,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:19:12,480 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:19:12,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:19:12,481 INFO L85 PathProgramCache]: Analyzing trace with hash -2055117535, now seen corresponding path program 3 times [2021-12-18 21:19:12,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:19:12,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556050018] [2021-12-18 21:19:12,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 21:19:12,481 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:19:12,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:19:12,482 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:19:12,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-12-18 21:19:12,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-18 21:19:12,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:19:12,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-18 21:19:12,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:19:12,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:19:12,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:19:12,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-12-18 21:19:12,906 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-18 21:19:12,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 35 [2021-12-18 21:19:12,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:12,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2021-12-18 21:19:13,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-18 21:19:13,187 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-18 21:19:13,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 36 [2021-12-18 21:19:13,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:13,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:13,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:13,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:19:13,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 46 [2021-12-18 21:19:13,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-12-18 21:19:13,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:13,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2021-12-18 21:19:14,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:14,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2021-12-18 21:19:14,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:19:14,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 22 [2021-12-18 21:19:14,330 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:19:14,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:19:15,956 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:19:15,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556050018] [2021-12-18 21:19:15,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556050018] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:19:15,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1818256375] [2021-12-18 21:19:15,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 21:19:15,957 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:19:15,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:19:15,968 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:19:15,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2021-12-18 21:19:16,196 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 21:19:16,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612212915] [2021-12-18 21:19:16,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 21:19:16,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:19:16,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:19:16,199 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 21:19:16,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 1 [2021-12-18 21:19:16,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-18 21:19:16,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-18 21:19:16,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:19:16,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-18 21:19:16,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:19:16,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:19:16,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:19:16,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-12-18 21:19:16,944 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-18 21:19:16,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 35 [2021-12-18 21:19:17,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:17,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2021-12-18 21:19:17,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-18 21:19:17,421 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-18 21:19:17,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 36 [2021-12-18 21:19:17,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:17,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:17,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:17,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:19:17,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 46 [2021-12-18 21:19:17,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-12-18 21:19:18,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:18,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2021-12-18 21:19:18,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:18,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2021-12-18 21:19:18,502 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:19:18,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 22 [2021-12-18 21:19:18,509 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:19:18,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:19:20,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612212915] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:19:20,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:19:20,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 43 [2021-12-18 21:19:20,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092293607] [2021-12-18 21:19:20,113 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:19:20,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-18 21:19:20,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:19:20,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-18 21:19:20,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=3616, Unknown=0, NotChecked=0, Total=3906 [2021-12-18 21:19:20,114 INFO L87 Difference]: Start difference. First operand 216 states and 260 transitions. Second operand has 44 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 36 states have internal predecessors, (73), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-18 21:19:21,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:19:21,674 INFO L93 Difference]: Finished difference Result 216 states and 259 transitions. [2021-12-18 21:19:21,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-18 21:19:21,674 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 36 states have internal predecessors, (73), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 65 [2021-12-18 21:19:21,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:19:21,675 INFO L225 Difference]: With dead ends: 216 [2021-12-18 21:19:21,675 INFO L226 Difference]: Without dead ends: 216 [2021-12-18 21:19:21,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 93 SyntacticMatches, 16 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2062 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=433, Invalid=5117, Unknown=0, NotChecked=0, Total=5550 [2021-12-18 21:19:21,676 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 39 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 258 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:19:21,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 597 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1088 Invalid, 0 Unknown, 258 Unchecked, 1.0s Time] [2021-12-18 21:19:21,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-18 21:19:21,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2021-12-18 21:19:21,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 188 states have (on average 1.2234042553191489) internal successors, (230), 194 states have internal predecessors, (230), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (18), 15 states have call predecessors, (18), 11 states have call successors, (18) [2021-12-18 21:19:21,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 259 transitions. [2021-12-18 21:19:21,680 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 259 transitions. Word has length 65 [2021-12-18 21:19:21,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:19:21,680 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 259 transitions. [2021-12-18 21:19:21,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 36 states have internal predecessors, (73), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-18 21:19:21,681 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 259 transitions. [2021-12-18 21:19:21,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-18 21:19:21,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:19:21,681 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:19:21,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-12-18 21:19:21,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-12-18 21:19:22,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:19:22,106 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:19:22,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:19:22,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1710505780, now seen corresponding path program 5 times [2021-12-18 21:19:22,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:19:22,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2026108324] [2021-12-18 21:19:22,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 21:19:22,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:19:22,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:19:22,108 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:19:22,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-12-18 21:19:22,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-18 21:19:22,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:19:22,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-18 21:19:22,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:19:22,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:19:22,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:19:24,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:24,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:19:24,608 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:19:24,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:19:26,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:26,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:19:26,809 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:19:26,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:19:26,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:26,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:19:26,995 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:19:26,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:19:27,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:27,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:19:27,203 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:19:27,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:19:29,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:29,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:19:29,411 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:19:29,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:19:29,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:29,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:19:29,648 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:19:29,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:19:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 6 proven. 103 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-18 21:19:29,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:19:30,372 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:19:30,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2026108324] [2021-12-18 21:19:30,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2026108324] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:19:30,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [551872480] [2021-12-18 21:19:30,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 21:19:30,372 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:19:30,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:19:30,373 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:19:30,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2021-12-18 21:19:30,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-18 21:19:30,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:19:30,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-18 21:19:30,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:19:30,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:19:31,087 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:19:31,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 21:19:31,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:31,533 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-18 21:19:31,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 30 [2021-12-18 21:19:31,546 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:19:31,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-18 21:19:31,914 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:19:31,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-18 21:19:31,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:19:32,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:32,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:19:32,167 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:19:32,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-18 21:19:32,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:32,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:19:32,325 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:19:32,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:19:32,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:32,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:19:32,485 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:19:32,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:19:32,498 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 16 proven. 125 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 21:19:32,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:19:35,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [551872480] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:19:35,013 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:19:35,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24] total 30 [2021-12-18 21:19:35,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715595870] [2021-12-18 21:19:35,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:19:35,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-18 21:19:35,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:19:35,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-18 21:19:35,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=955, Unknown=1, NotChecked=0, Total=1056 [2021-12-18 21:19:35,014 INFO L87 Difference]: Start difference. First operand 216 states and 259 transitions. Second operand has 31 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 27 states have internal predecessors, (63), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-18 21:19:38,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:19:38,399 INFO L93 Difference]: Finished difference Result 288 states and 327 transitions. [2021-12-18 21:19:38,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 21:19:38,400 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 27 states have internal predecessors, (63), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) Word has length 68 [2021-12-18 21:19:38,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:19:38,401 INFO L225 Difference]: With dead ends: 288 [2021-12-18 21:19:38,401 INFO L226 Difference]: Without dead ends: 288 [2021-12-18 21:19:38,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 92 SyntacticMatches, 20 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=141, Invalid=1339, Unknown=2, NotChecked=0, Total=1482 [2021-12-18 21:19:38,401 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 99 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 1447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:19:38,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 1015 Invalid, 1447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1193 Invalid, 0 Unknown, 229 Unchecked, 1.0s Time] [2021-12-18 21:19:38,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-12-18 21:19:38,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 216. [2021-12-18 21:19:38,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 188 states have (on average 1.2180851063829787) internal successors, (229), 194 states have internal predecessors, (229), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (18), 15 states have call predecessors, (18), 11 states have call successors, (18) [2021-12-18 21:19:38,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 258 transitions. [2021-12-18 21:19:38,405 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 258 transitions. Word has length 68 [2021-12-18 21:19:38,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:19:38,405 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 258 transitions. [2021-12-18 21:19:38,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 27 states have internal predecessors, (63), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-18 21:19:38,405 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 258 transitions. [2021-12-18 21:19:38,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-18 21:19:38,405 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:19:38,405 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:19:38,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2021-12-18 21:19:38,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-12-18 21:19:38,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:19:38,810 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:19:38,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:19:38,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1385006831, now seen corresponding path program 4 times [2021-12-18 21:19:38,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:19:38,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [366061554] [2021-12-18 21:19:38,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 21:19:38,810 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:19:38,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:19:38,811 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:19:38,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-12-18 21:19:38,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 21:19:38,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:19:39,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-18 21:19:39,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:19:39,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:19:39,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:19:39,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-12-18 21:19:39,293 INFO L354 Elim1Store]: treesize reduction 42, result has 42.5 percent of original size [2021-12-18 21:19:39,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 45 [2021-12-18 21:19:39,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:39,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-12-18 21:19:39,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-18 21:19:39,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:39,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-12-18 21:19:39,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:19:39,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-12-18 21:19:39,884 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 30 proven. 73 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-18 21:19:39,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:19:40,479 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:19:40,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [366061554] [2021-12-18 21:19:40,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [366061554] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:19:40,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [359852327] [2021-12-18 21:19:40,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 21:19:40,480 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:19:40,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:19:40,481 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:19:40,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2021-12-18 21:19:40,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 21:19:40,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:19:40,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-18 21:19:40,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:19:40,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:19:40,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:19:41,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-12-18 21:19:41,080 INFO L354 Elim1Store]: treesize reduction 42, result has 42.5 percent of original size [2021-12-18 21:19:41,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 45 [2021-12-18 21:19:41,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:41,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-12-18 21:19:41,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-18 21:19:41,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:19:41,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-12-18 21:19:41,455 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:19:41,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-12-18 21:19:41,463 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 30 proven. 73 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-18 21:19:41,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:19:41,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [359852327] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:19:41,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:19:41,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-12-18 21:19:41,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862053050] [2021-12-18 21:19:41,846 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:19:41,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-18 21:19:41,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:19:41,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-18 21:19:41,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2021-12-18 21:19:41,847 INFO L87 Difference]: Start difference. First operand 216 states and 258 transitions. Second operand has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 21:19:42,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:19:42,769 INFO L93 Difference]: Finished difference Result 234 states and 276 transitions. [2021-12-18 21:19:42,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 21:19:42,770 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 69 [2021-12-18 21:19:42,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:19:42,771 INFO L225 Difference]: With dead ends: 234 [2021-12-18 21:19:42,771 INFO L226 Difference]: Without dead ends: 234 [2021-12-18 21:19:42,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 132 SyntacticMatches, 10 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=126, Invalid=1206, Unknown=0, NotChecked=0, Total=1332 [2021-12-18 21:19:42,771 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 28 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 21:19:42,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 575 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 733 Invalid, 0 Unknown, 118 Unchecked, 0.7s Time] [2021-12-18 21:19:42,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-18 21:19:42,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2021-12-18 21:19:42,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 205 states have (on average 1.2048780487804878) internal successors, (247), 210 states have internal predecessors, (247), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (18), 16 states have call predecessors, (18), 11 states have call successors, (18) [2021-12-18 21:19:42,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 276 transitions. [2021-12-18 21:19:42,774 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 276 transitions. Word has length 69 [2021-12-18 21:19:42,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:19:42,774 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 276 transitions. [2021-12-18 21:19:42,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 21:19:42,775 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 276 transitions. [2021-12-18 21:19:42,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-18 21:19:42,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:19:42,775 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:19:42,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2021-12-18 21:19:42,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2021-12-18 21:19:43,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 21:19:43,185 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:19:43,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:19:43,185 INFO L85 PathProgramCache]: Analyzing trace with hash 752407323, now seen corresponding path program 4 times [2021-12-18 21:19:43,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:19:43,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746466718] [2021-12-18 21:19:43,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 21:19:43,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:19:43,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:19:43,186 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:19:43,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-12-18 21:19:43,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 21:19:43,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:19:43,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 21:19:43,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:19:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-18 21:19:43,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:19:43,743 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-18 21:19:43,743 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:19:43,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746466718] [2021-12-18 21:19:43,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746466718] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:19:43,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:19:43,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-18 21:19:43,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378880358] [2021-12-18 21:19:43,743 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:19:43,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 21:19:43,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:19:43,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 21:19:43,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-12-18 21:19:43,744 INFO L87 Difference]: Start difference. First operand 234 states and 276 transitions. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-18 21:19:44,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:19:44,070 INFO L93 Difference]: Finished difference Result 230 states and 261 transitions. [2021-12-18 21:19:44,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 21:19:44,071 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 68 [2021-12-18 21:19:44,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:19:44,072 INFO L225 Difference]: With dead ends: 230 [2021-12-18 21:19:44,072 INFO L226 Difference]: Without dead ends: 230 [2021-12-18 21:19:44,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-12-18 21:19:44,072 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 62 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:19:44,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 595 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 21:19:44,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-12-18 21:19:44,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 220. [2021-12-18 21:19:44,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 191 states have (on average 1.1727748691099475) internal successors, (224), 196 states have internal predecessors, (224), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (18), 16 states have call predecessors, (18), 11 states have call successors, (18) [2021-12-18 21:19:44,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 253 transitions. [2021-12-18 21:19:44,075 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 253 transitions. Word has length 68 [2021-12-18 21:19:44,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:19:44,076 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 253 transitions. [2021-12-18 21:19:44,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-18 21:19:44,076 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 253 transitions. [2021-12-18 21:19:44,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-18 21:19:44,076 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:19:44,076 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:19:44,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-12-18 21:19:44,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:19:44,284 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:19:44,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:19:44,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1508887660, now seen corresponding path program 3 times [2021-12-18 21:19:44,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:19:44,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070513869] [2021-12-18 21:19:44,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 21:19:44,285 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:19:44,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:19:44,286 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:19:44,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-12-18 21:19:44,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-18 21:19:44,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:19:44,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-18 21:19:44,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:19:44,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:19:44,549 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:19:44,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:19:44,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:19:46,680 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_127| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_191| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_149| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_127| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_127|) (bvadd (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_191| (_ bv4 32)) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_149| (_ bv4294967292 32)))))) is different from true [2021-12-18 21:19:52,601 INFO L354 Elim1Store]: treesize reduction 91, result has 31.6 percent of original size [2021-12-18 21:19:52,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 61 [2021-12-18 21:19:54,703 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_150| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_128| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_192| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_128| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_128|) (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_150| (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_192| (_ bv4 32)) (_ bv4294967288 32)))))) is different from true [2021-12-18 21:19:54,841 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-18 21:19:54,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-18 21:19:56,981 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_129| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_151| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_193| (_ BitVec 32))) (and (bvslt |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_193| (_ bv10 32)) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_129| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_129|) (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_151| (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_193| (_ bv4 32)) (_ bv4294967284 32))))))) is different from true [2021-12-18 21:19:57,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2021-12-18 21:19:57,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:19:57,990 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 30 not checked. [2021-12-18 21:19:57,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:19:58,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2021-12-18 21:20:00,958 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:20:00,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070513869] [2021-12-18 21:20:00,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070513869] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:20:00,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1515703706] [2021-12-18 21:20:00,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 21:20:00,959 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:20:00,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:20:00,960 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:20:00,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2021-12-18 21:20:01,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-18 21:20:01,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:20:01,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-18 21:20:01,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:20:01,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:20:01,347 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:20:01,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 21:20:01,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:20:03,435 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_134| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_197| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_155| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_134| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_134|) (bvadd (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_197| (_ bv4 32)) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_155| (_ bv4294967292 32)))))) is different from true [2021-12-18 21:20:11,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:20:13,481 INFO L354 Elim1Store]: treesize reduction 53, result has 35.4 percent of original size [2021-12-18 21:20:13,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 61 [2021-12-18 21:20:16,676 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_198| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_135| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_156| (_ BitVec 32))) (let ((.cse0 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_198| (_ bv4 32)))) (and (bvule (bvadd .cse0 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_156| (_ bv4294967292 32)) (bvadd .cse0 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_156|)) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_135| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_135|) (bvadd .cse0 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_156| (_ bv4294967288 32)))))))) is different from true [2021-12-18 21:20:21,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:20:23,258 INFO L354 Elim1Store]: treesize reduction 53, result has 35.4 percent of original size [2021-12-18 21:20:23,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 61 [2021-12-18 21:20:45,028 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_199| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_136| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_157| (_ BitVec 32))) (let ((.cse2 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_199| (_ bv4 32)))) (let ((.cse1 (bvadd .cse2 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_157| (_ bv4294967292 32)))) (and (exists ((|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_198| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_156| (_ BitVec 32))) (and (let ((.cse0 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_198| (_ bv4 32)))) (bvule (bvadd .cse0 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_156| (_ bv4294967292 32)) (bvadd .cse0 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_156|))) (or (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_135| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_135| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_135|) (bvadd (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_198| (_ bv4 32)) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_156| (_ bv4294967288 32)))))) (= (bvadd (bvmul (_ bv4 32) |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_198|) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_156|) (bvadd (bvmul (_ bv4 32) |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_199|) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_157| (_ bv4 32)))))) (bvule .cse1 (bvadd .cse2 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_157|)) (bvule (bvadd .cse2 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_157| (_ bv4294967288 32)) .cse1) (bvslt |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_199| (_ bv10 32)) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_136| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_136|) (bvadd .cse2 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_157| (_ bv4294967284 32))))))))) is different from true [2021-12-18 21:21:52,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:21:52,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 93 [2021-12-18 21:21:54,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:21:55,863 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 30 not checked. [2021-12-18 21:21:55,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:21:56,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2021-12-18 21:21:57,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1515703706] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:21:57,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:21:57,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 32] total 47 [2021-12-18 21:21:57,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532155964] [2021-12-18 21:21:57,551 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:21:57,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-18 21:21:57,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:21:57,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-18 21:21:57,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=3036, Unknown=17, NotChecked=702, Total=4032 [2021-12-18 21:21:57,552 INFO L87 Difference]: Start difference. First operand 220 states and 253 transitions. Second operand has 48 states, 45 states have (on average 2.2666666666666666) internal successors, (102), 46 states have internal predecessors, (102), 7 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:21:59,344 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 21:22:30,255 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 21:22:43,129 WARN L227 SmtUtils]: Spent 5.27s on a formula simplification. DAG size of input: 68 DAG size of output: 34 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 21:22:53,151 WARN L227 SmtUtils]: Spent 5.71s on a formula simplification. DAG size of input: 52 DAG size of output: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 21:23:05,626 WARN L227 SmtUtils]: Spent 8.17s on a formula simplification. DAG size of input: 60 DAG size of output: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 21:23:41,763 WARN L227 SmtUtils]: Spent 9.05s on a formula simplification. DAG size of input: 84 DAG size of output: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 21:24:00,214 WARN L227 SmtUtils]: Spent 11.52s on a formula simplification. DAG size of input: 92 DAG size of output: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 21:24:27,337 WARN L227 SmtUtils]: Spent 15.26s on a formula simplification. DAG size of input: 97 DAG size of output: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 21:24:37,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:24:37,551 INFO L93 Difference]: Finished difference Result 244 states and 284 transitions. [2021-12-18 21:24:37,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-18 21:24:37,552 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 2.2666666666666666) internal successors, (102), 46 states have internal predecessors, (102), 7 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 70 [2021-12-18 21:24:37,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:24:37,553 INFO L225 Difference]: With dead ends: 244 [2021-12-18 21:24:37,553 INFO L226 Difference]: Without dead ends: 244 [2021-12-18 21:24:37,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 175 SyntacticMatches, 18 SemanticMatches, 83 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 2288 ImplicationChecksByTransitivity, 239.7s TimeCoverageRelationStatistics Valid=586, Invalid=5562, Unknown=38, NotChecked=954, Total=7140 [2021-12-18 21:24:37,554 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 56 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 494 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:24:37,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 507 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 570 Invalid, 0 Unknown, 494 Unchecked, 4.2s Time] [2021-12-18 21:24:37,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-12-18 21:24:37,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 228. [2021-12-18 21:24:37,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 199 states have (on average 1.1959798994974875) internal successors, (238), 204 states have internal predecessors, (238), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (18), 16 states have call predecessors, (18), 11 states have call successors, (18) [2021-12-18 21:24:37,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 267 transitions. [2021-12-18 21:24:37,557 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 267 transitions. Word has length 70 [2021-12-18 21:24:37,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:24:37,557 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 267 transitions. [2021-12-18 21:24:37,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 2.2666666666666666) internal successors, (102), 46 states have internal predecessors, (102), 7 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 21:24:37,557 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 267 transitions. [2021-12-18 21:24:37,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-18 21:24:37,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:24:37,558 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:24:37,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2021-12-18 21:24:37,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (60)] Ended with exit code 0 [2021-12-18 21:24:37,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 21:24:37,958 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:24:37,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:24:37,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1657901585, now seen corresponding path program 3 times [2021-12-18 21:24:37,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:24:37,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153337162] [2021-12-18 21:24:37,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 21:24:37,959 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:24:37,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:24:37,960 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:24:37,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-12-18 21:24:38,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-18 21:24:38,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:24:38,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-18 21:24:38,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:24:38,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:24:38,656 INFO L354 Elim1Store]: treesize reduction 11, result has 35.3 percent of original size [2021-12-18 21:24:38,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 44 [2021-12-18 21:24:39,166 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-18 21:24:39,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 55 [2021-12-18 21:24:39,709 INFO L354 Elim1Store]: treesize reduction 48, result has 21.3 percent of original size [2021-12-18 21:24:39,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 194 treesize of output 182 [2021-12-18 21:24:40,853 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-12-18 21:24:40,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 84 [2021-12-18 21:24:42,551 INFO L354 Elim1Store]: treesize reduction 111, result has 14.6 percent of original size [2021-12-18 21:24:42,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 918 treesize of output 890 [2021-12-18 21:24:47,402 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-12-18 21:24:47,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 149 treesize of output 55 [2021-12-18 21:25:40,203 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-18 21:25:40,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:25:47,618 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:25:47,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153337162] [2021-12-18 21:25:47,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153337162] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:25:47,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [993063778] [2021-12-18 21:25:47,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 21:25:47,618 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 21:25:47,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 21:25:47,619 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 21:25:47,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2021-12-18 21:25:48,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-18 21:25:48,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:25:48,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-18 21:25:48,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:25:54,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:25:54,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:25:55,326 INFO L354 Elim1Store]: treesize reduction 27, result has 18.2 percent of original size [2021-12-18 21:25:55,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 37 [2021-12-18 21:25:59,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:25:59,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 73 [2021-12-18 21:25:59,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:25:59,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 42 [2021-12-18 21:26:00,896 INFO L354 Elim1Store]: treesize reduction 66, result has 16.5 percent of original size [2021-12-18 21:26:00,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 341 treesize of output 327 [2021-12-18 21:26:08,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:26:08,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:26:08,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:26:08,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 105 [2021-12-18 21:26:08,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:26:08,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2021-12-18 21:26:09,997 INFO L354 Elim1Store]: treesize reduction 132, result has 9.0 percent of original size [2021-12-18 21:26:09,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 2239 treesize of output 2169 [2021-12-18 21:26:26,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:26:26,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:26:26,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:26:26,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:26:26,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 87 [2021-12-18 21:26:26,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:26:26,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-18 21:26:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 26 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:26:59,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... Killed by 15