./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 38a2fba2a92db51b6a97ddc82d5dc9e2df7a8770315ef841bfaf5f0764404946 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:53:44,155 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:53:44,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:53:44,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:53:44,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:53:44,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:53:44,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:53:44,204 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:53:44,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:53:44,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:53:44,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:53:44,216 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:53:44,216 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:53:44,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:53:44,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:53:44,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:53:44,227 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:53:44,228 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:53:44,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:53:44,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:53:44,236 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:53:44,237 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:53:44,238 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:53:44,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:53:44,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:53:44,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:53:44,242 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:53:44,242 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:53:44,243 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:53:44,244 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:53:44,245 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:53:44,245 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:53:44,246 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:53:44,246 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:53:44,247 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:53:44,247 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:53:44,248 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:53:44,248 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:53:44,248 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:53:44,249 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:53:44,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:53:44,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:53:44,251 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-12 18:53:44,270 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:53:44,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:53:44,270 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:53:44,270 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:53:44,271 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:53:44,271 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:53:44,272 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:53:44,272 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:53:44,272 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:53:44,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:53:44,273 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:53:44,273 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:53:44,273 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:53:44,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:53:44,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:53:44,274 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:53:44,274 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:53:44,274 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:53:44,274 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:53:44,274 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:53:44,274 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:53:44,275 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:53:44,275 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:53:44,275 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:53:44,275 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:53:44,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:53:44,276 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:53:44,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:53:44,276 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 18:53:44,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 18:53:44,276 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38a2fba2a92db51b6a97ddc82d5dc9e2df7a8770315ef841bfaf5f0764404946 [2022-07-12 18:53:44,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:53:44,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:53:44,518 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:53:44,520 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:53:44,520 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:53:44,522 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i [2022-07-12 18:53:44,597 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78e823e78/df7f756de18445c9bd17f675c67244d7/FLAG544ab74e0 [2022-07-12 18:53:45,042 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:53:45,048 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i [2022-07-12 18:53:45,067 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78e823e78/df7f756de18445c9bd17f675c67244d7/FLAG544ab74e0 [2022-07-12 18:53:45,384 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78e823e78/df7f756de18445c9bd17f675c67244d7 [2022-07-12 18:53:45,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:53:45,387 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:53:45,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:53:45,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:53:45,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:53:45,392 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:53:45" (1/1) ... [2022-07-12 18:53:45,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57c90aef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:45, skipping insertion in model container [2022-07-12 18:53:45,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:53:45" (1/1) ... [2022-07-12 18:53:45,398 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:53:45,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:53:45,798 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:53:45,823 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-07-12 18:53:45,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@56a81032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:45, skipping insertion in model container [2022-07-12 18:53:45,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:53:45,825 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-12 18:53:45,827 INFO L158 Benchmark]: Toolchain (without parser) took 438.70ms. Allocated memory was 90.2MB in the beginning and 134.2MB in the end (delta: 44.0MB). Free memory was 54.9MB in the beginning and 103.6MB in the end (delta: -48.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-12 18:53:45,828 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 90.2MB. Free memory was 44.8MB in the beginning and 44.7MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 18:53:45,830 INFO L158 Benchmark]: CACSL2BoogieTranslator took 436.58ms. Allocated memory was 90.2MB in the beginning and 134.2MB in the end (delta: 44.0MB). Free memory was 54.8MB in the beginning and 103.6MB in the end (delta: -48.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-12 18:53:45,832 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 90.2MB. Free memory was 44.8MB in the beginning and 44.7MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 436.58ms. Allocated memory was 90.2MB in the beginning and 134.2MB in the end (delta: 44.0MB). Free memory was 54.8MB in the beginning and 103.6MB in the end (delta: -48.9MB). Peak memory consumption was 6.3MB. 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 of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 38a2fba2a92db51b6a97ddc82d5dc9e2df7a8770315ef841bfaf5f0764404946 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:53:47,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:53:47,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:53:47,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:53:47,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:53:47,659 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:53:47,666 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:53:47,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:53:47,671 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:53:47,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:53:47,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:53:47,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:53:47,681 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:53:47,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:53:47,684 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:53:47,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:53:47,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:53:47,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:53:47,693 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:53:47,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:53:47,697 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:53:47,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:53:47,700 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:53:47,701 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:53:47,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:53:47,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:53:47,707 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:53:47,707 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:53:47,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:53:47,709 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:53:47,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:53:47,710 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:53:47,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:53:47,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:53:47,713 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:53:47,714 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:53:47,714 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:53:47,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:53:47,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:53:47,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:53:47,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:53:47,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:53:47,717 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-12 18:53:47,749 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:53:47,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:53:47,750 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:53:47,750 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:53:47,751 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:53:47,751 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:53:47,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:53:47,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:53:47,752 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:53:47,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:53:47,753 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:53:47,753 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:53:47,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:53:47,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:53:47,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:53:47,754 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:53:47,754 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:53:47,754 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:53:47,754 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:53:47,755 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:53:47,755 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-12 18:53:47,755 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-12 18:53:47,755 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:53:47,755 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:53:47,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:53:47,756 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:53:47,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:53:47,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:53:47,756 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:53:47,756 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:53:47,757 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-12 18:53:47,757 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-12 18:53:47,757 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-12 18:53:47,757 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38a2fba2a92db51b6a97ddc82d5dc9e2df7a8770315ef841bfaf5f0764404946 [2022-07-12 18:53:48,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:53:48,101 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:53:48,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:53:48,104 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:53:48,105 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:53:48,107 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i [2022-07-12 18:53:48,162 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1db2cd3b/1aacb692779e44b1ad428532c0371302/FLAGef1b4a3bf [2022-07-12 18:53:48,682 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:53:48,682 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i [2022-07-12 18:53:48,697 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1db2cd3b/1aacb692779e44b1ad428532c0371302/FLAGef1b4a3bf [2022-07-12 18:53:49,013 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1db2cd3b/1aacb692779e44b1ad428532c0371302 [2022-07-12 18:53:49,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:53:49,018 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:53:49,019 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:53:49,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:53:49,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:53:49,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:53:49" (1/1) ... [2022-07-12 18:53:49,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e02374d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:49, skipping insertion in model container [2022-07-12 18:53:49,025 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:53:49" (1/1) ... [2022-07-12 18:53:49,033 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:53:49,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:53:49,503 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:53:49,524 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-12 18:53:49,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:53:49,598 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:53:49,613 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 18:53:49,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:53:49,718 INFO L208 MainTranslator]: Completed translation [2022-07-12 18:53:49,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:49 WrapperNode [2022-07-12 18:53:49,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:53:49,720 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 18:53:49,721 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 18:53:49,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 18:53:49,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:49" (1/1) ... [2022-07-12 18:53:49,763 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:49" (1/1) ... [2022-07-12 18:53:49,783 INFO L137 Inliner]: procedures = 166, calls = 76, calls flagged for inlining = 22, calls inlined = 4, statements flattened = 70 [2022-07-12 18:53:49,784 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 18:53:49,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 18:53:49,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 18:53:49,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 18:53:49,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:49" (1/1) ... [2022-07-12 18:53:49,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:49" (1/1) ... [2022-07-12 18:53:49,797 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:49" (1/1) ... [2022-07-12 18:53:49,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:49" (1/1) ... [2022-07-12 18:53:49,808 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:49" (1/1) ... [2022-07-12 18:53:49,821 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:49" (1/1) ... [2022-07-12 18:53:49,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:49" (1/1) ... [2022-07-12 18:53:49,833 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 18:53:49,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 18:53:49,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 18:53:49,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 18:53:49,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:49" (1/1) ... [2022-07-12 18:53:49,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:53:49,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:53:49,864 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) [2022-07-12 18:53:49,880 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 [2022-07-12 18:53:49,895 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-12 18:53:49,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-12 18:53:49,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 18:53:49,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 18:53:49,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 18:53:49,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 18:53:49,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 18:53:49,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-12 18:53:49,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 18:53:49,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 18:53:49,989 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 18:53:49,990 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 18:53:50,284 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 18:53:50,299 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 18:53:50,300 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-12 18:53:50,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:53:50 BoogieIcfgContainer [2022-07-12 18:53:50,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 18:53:50,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 18:53:50,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 18:53:50,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 18:53:50,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:53:49" (1/3) ... [2022-07-12 18:53:50,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386d6914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:53:50, skipping insertion in model container [2022-07-12 18:53:50,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:49" (2/3) ... [2022-07-12 18:53:50,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386d6914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:53:50, skipping insertion in model container [2022-07-12 18:53:50,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:53:50" (3/3) ... [2022-07-12 18:53:50,310 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test17_3.i [2022-07-12 18:53:50,324 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 18:53:50,325 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-07-12 18:53:50,394 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 18:53:50,400 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3d305066, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4eca2b88 [2022-07-12 18:53:50,400 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2022-07-12 18:53:50,406 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 48 states have internal predecessors, (57), 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) [2022-07-12 18:53:50,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:53:50,412 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:50,413 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:50,413 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:53:50,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:50,420 INFO L85 PathProgramCache]: Analyzing trace with hash 714233942, now seen corresponding path program 1 times [2022-07-12 18:53:50,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:50,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1261879672] [2022-07-12 18:53:50,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:50,432 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:50,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:50,437 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) [2022-07-12 18:53:50,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-12 18:53:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:50,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:53:50,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:53:50,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:53:50,600 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:50,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1261879672] [2022-07-12 18:53:50,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1261879672] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:53:50,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:53:50,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:53:50,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671115202] [2022-07-12 18:53:50,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:53:50,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:53:50,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:50,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:53:50,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:53:50,642 INFO L87 Difference]: Start difference. First operand has 52 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 48 states have internal predecessors, (57), 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) [2022-07-12 18:53:50,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:50,751 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2022-07-12 18:53:50,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:53:50,754 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 [2022-07-12 18:53:50,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:50,761 INFO L225 Difference]: With dead ends: 98 [2022-07-12 18:53:50,761 INFO L226 Difference]: Without dead ends: 94 [2022-07-12 18:53:50,763 INFO L412 NwaCegarLoop]: 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 [2022-07-12 18:53:50,766 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 46 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:50,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 199 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:53:50,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-12 18:53:50,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 54. [2022-07-12 18:53:50,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 49 states have internal predecessors, (55), 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) [2022-07-12 18:53:50,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2022-07-12 18:53:50,826 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 11 [2022-07-12 18:53:50,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:50,828 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2022-07-12 18:53:50,828 INFO L496 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) [2022-07-12 18:53:50,828 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2022-07-12 18:53:50,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:53:50,829 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:50,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:50,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-12 18:53:51,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:53:51,041 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:53:51,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:51,041 INFO L85 PathProgramCache]: Analyzing trace with hash 714155687, now seen corresponding path program 1 times [2022-07-12 18:53:51,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:51,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1581592511] [2022-07-12 18:53:51,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:51,043 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:51,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:51,044 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) [2022-07-12 18:53:51,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-12 18:53:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:51,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 18:53:51,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:51,172 INFO L390 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 [2022-07-12 18:53:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:53:51,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:53:51,209 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:51,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1581592511] [2022-07-12 18:53:51,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1581592511] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:53:51,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:53:51,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:53:51,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472746220] [2022-07-12 18:53:51,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:53:51,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:53:51,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:51,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:53:51,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:53:51,214 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:53:51,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:51,382 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2022-07-12 18:53:51,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:53:51,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-07-12 18:53:51,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:51,384 INFO L225 Difference]: With dead ends: 67 [2022-07-12 18:53:51,384 INFO L226 Difference]: Without dead ends: 67 [2022-07-12 18:53:51,385 INFO L412 NwaCegarLoop]: 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 [2022-07-12 18:53:51,386 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 13 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:51,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 140 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:53:51,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-12 18:53:51,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2022-07-12 18:53:51,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 58 states have internal predecessors, (69), 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) [2022-07-12 18:53:51,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2022-07-12 18:53:51,394 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 11 [2022-07-12 18:53:51,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:51,395 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2022-07-12 18:53:51,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:53:51,396 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2022-07-12 18:53:51,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:53:51,396 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:51,396 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:51,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-12 18:53:51,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:53:51,606 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:53:51,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:51,606 INFO L85 PathProgramCache]: Analyzing trace with hash 714155688, now seen corresponding path program 1 times [2022-07-12 18:53:51,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:51,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1145837246] [2022-07-12 18:53:51,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:51,607 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:51,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:51,612 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) [2022-07-12 18:53:51,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-12 18:53:51,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:51,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 18:53:51,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:51,701 INFO L390 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 [2022-07-12 18:53:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:53:51,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:53:51,808 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:51,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1145837246] [2022-07-12 18:53:51,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1145837246] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:53:51,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:53:51,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 18:53:51,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913231303] [2022-07-12 18:53:51,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:53:51,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:53:51,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:51,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:53:51,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:53:51,812 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:53:52,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:52,105 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2022-07-12 18:53:52,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:53:52,106 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-07-12 18:53:52,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:52,109 INFO L225 Difference]: With dead ends: 82 [2022-07-12 18:53:52,109 INFO L226 Difference]: Without dead ends: 82 [2022-07-12 18:53:52,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:53:52,115 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 73 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:52,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 223 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:53:52,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-12 18:53:52,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73. [2022-07-12 18:53:52,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 54 states have (on average 1.5185185185185186) internal successors, (82), 68 states have internal predecessors, (82), 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) [2022-07-12 18:53:52,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2022-07-12 18:53:52,136 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 11 [2022-07-12 18:53:52,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:52,136 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2022-07-12 18:53:52,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:53:52,137 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2022-07-12 18:53:52,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:53:52,138 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:52,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:52,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-07-12 18:53:52,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:53:52,352 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:53:52,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:52,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1601737623, now seen corresponding path program 1 times [2022-07-12 18:53:52,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:52,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [566031238] [2022-07-12 18:53:52,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:52,353 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:52,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:52,355 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) [2022-07-12 18:53:52,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-12 18:53:52,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:52,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:53:52,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:53:52,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:53:52,421 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:52,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [566031238] [2022-07-12 18:53:52,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [566031238] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:53:52,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:53:52,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:53:52,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912398690] [2022-07-12 18:53:52,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:53:52,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:53:52,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:52,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:53:52,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:53:52,423 INFO L87 Difference]: Start difference. First operand 73 states and 88 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) [2022-07-12 18:53:52,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:52,542 INFO L93 Difference]: Finished difference Result 106 states and 125 transitions. [2022-07-12 18:53:52,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:53:52,542 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 [2022-07-12 18:53:52,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:52,544 INFO L225 Difference]: With dead ends: 106 [2022-07-12 18:53:52,544 INFO L226 Difference]: Without dead ends: 104 [2022-07-12 18:53:52,544 INFO L412 NwaCegarLoop]: 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 [2022-07-12 18:53:52,545 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 36 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:52,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 165 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:53:52,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-12 18:53:52,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 73. [2022-07-12 18:53:52,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 54 states have (on average 1.5) internal successors, (81), 68 states have internal predecessors, (81), 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) [2022-07-12 18:53:52,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2022-07-12 18:53:52,554 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 11 [2022-07-12 18:53:52,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:52,555 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2022-07-12 18:53:52,555 INFO L496 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) [2022-07-12 18:53:52,555 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2022-07-12 18:53:52,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:53:52,556 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:52,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:52,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-12 18:53:52,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:53:52,763 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:53:52,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:52,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1601659368, now seen corresponding path program 1 times [2022-07-12 18:53:52,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:52,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1138969329] [2022-07-12 18:53:52,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:52,764 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:52,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:52,766 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) [2022-07-12 18:53:52,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-12 18:53:52,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:52,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 18:53:52,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:52,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:53:52,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:53:52,850 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:52,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1138969329] [2022-07-12 18:53:52,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1138969329] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:53:52,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:53:52,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:53:52,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825636671] [2022-07-12 18:53:52,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:53:52,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:53:52,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:52,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:53:52,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:53:52,854 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:53:52,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:52,892 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2022-07-12 18:53:52,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:53:52,893 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 [2022-07-12 18:53:52,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:52,895 INFO L225 Difference]: With dead ends: 61 [2022-07-12 18:53:52,895 INFO L226 Difference]: Without dead ends: 59 [2022-07-12 18:53:52,895 INFO L412 NwaCegarLoop]: 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 [2022-07-12 18:53:52,901 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 0 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:52,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 208 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:53:52,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-12 18:53:52,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-07-12 18:53:52,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 55 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:53:52,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2022-07-12 18:53:52,918 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 11 [2022-07-12 18:53:52,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:52,919 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2022-07-12 18:53:52,919 INFO L496 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) [2022-07-12 18:53:52,919 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2022-07-12 18:53:52,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 18:53:52,920 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:52,920 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:52,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-12 18:53:53,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:53:53,131 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:53:53,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:53,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1855917097, now seen corresponding path program 1 times [2022-07-12 18:53:53,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:53,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826137465] [2022-07-12 18:53:53,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:53,132 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:53,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:53,135 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:53:53,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-12 18:53:53,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:53,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 18:53:53,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:53,211 INFO L390 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 [2022-07-12 18:53:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:53:53,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:53:54,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:53:54,167 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:54,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826137465] [2022-07-12 18:53:54,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826137465] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:53:54,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:53:54,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-07-12 18:53:54,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348144813] [2022-07-12 18:53:54,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:53:54,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 18:53:54,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:54,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 18:53:54,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-07-12 18:53:54,169 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:53:54,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:54,914 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2022-07-12 18:53:54,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:53:54,915 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2022-07-12 18:53:54,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:54,916 INFO L225 Difference]: With dead ends: 97 [2022-07-12 18:53:54,916 INFO L226 Difference]: Without dead ends: 97 [2022-07-12 18:53:54,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-07-12 18:53:54,917 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 227 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:54,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 261 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 186 Invalid, 0 Unknown, 81 Unchecked, 0.5s Time] [2022-07-12 18:53:54,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-12 18:53:54,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2022-07-12 18:53:54,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 50 states have (on average 1.44) internal successors, (72), 64 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:53:54,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2022-07-12 18:53:54,922 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 14 [2022-07-12 18:53:54,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:54,923 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2022-07-12 18:53:54,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:53:54,923 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2022-07-12 18:53:54,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-12 18:53:54,924 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:54,924 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:54,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-12 18:53:55,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:53:55,130 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:53:55,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:55,130 INFO L85 PathProgramCache]: Analyzing trace with hash 854181427, now seen corresponding path program 1 times [2022-07-12 18:53:55,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:55,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769067690] [2022-07-12 18:53:55,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:55,131 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:55,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:55,132 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) [2022-07-12 18:53:55,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-12 18:53:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:55,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 18:53:55,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:55,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:53:55,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:53:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:53:55,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:55,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769067690] [2022-07-12 18:53:55,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769067690] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:53:55,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:53:55,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-12 18:53:55,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328299265] [2022-07-12 18:53:55,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:53:55,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:53:55,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:55,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:53:55,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:53:55,345 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 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) [2022-07-12 18:53:55,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:55,511 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2022-07-12 18:53:55,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:53:55,513 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 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 22 [2022-07-12 18:53:55,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:55,513 INFO L225 Difference]: With dead ends: 74 [2022-07-12 18:53:55,513 INFO L226 Difference]: Without dead ends: 74 [2022-07-12 18:53:55,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:53:55,514 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 67 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:55,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 232 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:53:55,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-12 18:53:55,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-07-12 18:53:55,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 69 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:53:55,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2022-07-12 18:53:55,519 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 22 [2022-07-12 18:53:55,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:55,519 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2022-07-12 18:53:55,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 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) [2022-07-12 18:53:55,525 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2022-07-12 18:53:55,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-12 18:53:55,526 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:55,526 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:55,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-12 18:53:55,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:53:55,736 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:53:55,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:55,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1071704552, now seen corresponding path program 2 times [2022-07-12 18:53:55,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:55,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1577940865] [2022-07-12 18:53:55,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:53:55,737 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:55,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:55,739 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) [2022-07-12 18:53:55,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-12 18:53:55,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:53:55,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:53:55,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 18:53:55,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:55,834 INFO L390 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 [2022-07-12 18:53:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:53:56,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:53:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:53:57,867 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:57,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1577940865] [2022-07-12 18:53:57,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1577940865] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:53:57,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:53:57,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-07-12 18:53:57,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619205842] [2022-07-12 18:53:57,868 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:53:57,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 18:53:57,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:57,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 18:53:57,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2022-07-12 18:53:57,869 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 22 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:54:00,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:00,426 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2022-07-12 18:54:00,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 18:54:00,427 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 22 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-07-12 18:54:00,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:00,427 INFO L225 Difference]: With dead ends: 91 [2022-07-12 18:54:00,427 INFO L226 Difference]: Without dead ends: 91 [2022-07-12 18:54:00,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 18:54:00,429 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 314 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:54:00,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 393 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 374 Invalid, 0 Unknown, 85 Unchecked, 1.0s Time] [2022-07-12 18:54:00,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-12 18:54:00,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2022-07-12 18:54:00,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 82 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:54:00,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 97 transitions. [2022-07-12 18:54:00,441 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 97 transitions. Word has length 23 [2022-07-12 18:54:00,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:00,442 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 97 transitions. [2022-07-12 18:54:00,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 22 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:54:00,444 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 97 transitions. [2022-07-12 18:54:00,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-12 18:54:00,445 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:00,446 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:54:00,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-12 18:54:00,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:54:00,655 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:54:00,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:00,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1134263027, now seen corresponding path program 2 times [2022-07-12 18:54:00,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:00,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588016138] [2022-07-12 18:54:00,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:54:00,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:00,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:00,659 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) [2022-07-12 18:54:00,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-12 18:54:00,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 18:54:00,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:54:00,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 18:54:00,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-12 18:54:00,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:54:00,778 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:00,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588016138] [2022-07-12 18:54:00,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1588016138] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:54:00,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:54:00,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:54:00,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622687098] [2022-07-12 18:54:00,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:54:00,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:54:00,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:00,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:54:00,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:54:00,785 INFO L87 Difference]: Start difference. First operand 86 states and 97 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2022-07-12 18:54:00,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:00,831 INFO L93 Difference]: Finished difference Result 114 states and 126 transitions. [2022-07-12 18:54:00,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:54:00,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 34 [2022-07-12 18:54:00,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:00,834 INFO L225 Difference]: With dead ends: 114 [2022-07-12 18:54:00,834 INFO L226 Difference]: Without dead ends: 114 [2022-07-12 18:54:00,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:54:00,835 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 104 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:54:00,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 97 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:54:00,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-12 18:54:00,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 81. [2022-07-12 18:54:00,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 77 states have internal predecessors, (85), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:54:00,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2022-07-12 18:54:00,846 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 34 [2022-07-12 18:54:00,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:00,848 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2022-07-12 18:54:00,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2022-07-12 18:54:00,848 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2022-07-12 18:54:00,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-12 18:54:00,850 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:00,850 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:54:00,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-12 18:54:01,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:54:01,051 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:54:01,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:01,051 INFO L85 PathProgramCache]: Analyzing trace with hash 269265368, now seen corresponding path program 1 times [2022-07-12 18:54:01,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:01,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752698246] [2022-07-12 18:54:01,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:01,052 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:01,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:01,054 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) [2022-07-12 18:54:01,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-12 18:54:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:01,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:54:01,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:01,279 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:54:01,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:54:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:54:01,576 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:01,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752698246] [2022-07-12 18:54:01,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752698246] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:54:01,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:54:01,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-12 18:54:01,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36092537] [2022-07-12 18:54:01,576 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:54:01,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 18:54:01,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:01,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 18:54:01,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2022-07-12 18:54:01,577 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 18:54:01,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:01,834 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2022-07-12 18:54:01,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:54:01,840 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-07-12 18:54:01,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:01,841 INFO L225 Difference]: With dead ends: 81 [2022-07-12 18:54:01,841 INFO L226 Difference]: Without dead ends: 81 [2022-07-12 18:54:01,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2022-07-12 18:54:01,843 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 84 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:54:01,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 361 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:54:01,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-12 18:54:01,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-07-12 18:54:01,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 77 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:54:01,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2022-07-12 18:54:01,848 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 38 [2022-07-12 18:54:01,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:01,848 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2022-07-12 18:54:01,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 18:54:01,848 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2022-07-12 18:54:01,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-12 18:54:01,849 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:01,849 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:54:01,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-12 18:54:02,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:54:02,060 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:54:02,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:02,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1255484104, now seen corresponding path program 3 times [2022-07-12 18:54:02,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:02,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041690748] [2022-07-12 18:54:02,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:54:02,061 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:02,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:02,062 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) [2022-07-12 18:54:02,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-12 18:54:02,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-12 18:54:02,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:54:02,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 18:54:02,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:02,278 INFO L390 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 [2022-07-12 18:54:02,877 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:54:02,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:54:06,145 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:54:06,145 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:06,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041690748] [2022-07-12 18:54:06,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041690748] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:54:06,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:54:06,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2022-07-12 18:54:06,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893963732] [2022-07-12 18:54:06,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:54:06,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 18:54:06,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:06,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 18:54:06,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 18:54:06,147 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 35 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:54:09,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:09,999 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2022-07-12 18:54:09,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 18:54:10,000 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-07-12 18:54:10,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:10,000 INFO L225 Difference]: With dead ends: 115 [2022-07-12 18:54:10,000 INFO L226 Difference]: Without dead ends: 115 [2022-07-12 18:54:10,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=301, Invalid=1031, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 18:54:10,002 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 699 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:54:10,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [702 Valid, 614 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 852 Invalid, 0 Unknown, 109 Unchecked, 2.0s Time] [2022-07-12 18:54:10,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-12 18:54:10,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 79. [2022-07-12 18:54:10,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:54:10,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2022-07-12 18:54:10,005 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 41 [2022-07-12 18:54:10,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:10,006 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2022-07-12 18:54:10,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:54:10,006 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2022-07-12 18:54:10,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-12 18:54:10,007 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:10,007 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:54:10,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-07-12 18:54:10,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:54:10,217 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:54:10,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:10,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1908613480, now seen corresponding path program 2 times [2022-07-12 18:54:10,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:10,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [14670684] [2022-07-12 18:54:10,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:54:10,218 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:10,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:10,220 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) [2022-07-12 18:54:10,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-12 18:54:10,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:54:10,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:54:10,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 18:54:10,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:10,399 INFO L390 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 [2022-07-12 18:54:10,405 INFO L390 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 [2022-07-12 18:54:12,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:54:12,707 INFO L390 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 [2022-07-12 18:54:12,719 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:54:12,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:54:12,770 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-12 18:54:12,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:54:15,253 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:15,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [14670684] [2022-07-12 18:54:15,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [14670684] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:54:15,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1681165695] [2022-07-12 18:54:15,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:54:15,253 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:54:15,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:54:15,255 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) [2022-07-12 18:54:15,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-07-12 18:54:15,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:54:15,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:54:15,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 18:54:15,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:15,603 INFO L390 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 [2022-07-12 18:54:15,609 INFO L390 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 [2022-07-12 18:54:15,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:54:15,933 INFO L390 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 [2022-07-12 18:54:15,944 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:54:15,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:54:15,965 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-12 18:54:15,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:54:20,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1681165695] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:54:20,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:54:20,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2022-07-12 18:54:20,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055132446] [2022-07-12 18:54:20,278 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:54:20,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 18:54:20,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:20,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 18:54:20,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=128, Unknown=1, NotChecked=0, Total=156 [2022-07-12 18:54:20,279 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:54:20,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:20,817 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2022-07-12 18:54:20,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:54:20,817 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2022-07-12 18:54:20,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:20,818 INFO L225 Difference]: With dead ends: 168 [2022-07-12 18:54:20,818 INFO L226 Difference]: Without dead ends: 168 [2022-07-12 18:54:20,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=43, Invalid=196, Unknown=1, NotChecked=0, Total=240 [2022-07-12 18:54:20,819 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 92 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:54:20,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 451 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 380 Invalid, 0 Unknown, 53 Unchecked, 0.4s Time] [2022-07-12 18:54:20,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-12 18:54:20,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 112. [2022-07-12 18:54:20,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 93 states have (on average 1.3870967741935485) internal successors, (129), 105 states have internal predecessors, (129), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-12 18:54:20,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 140 transitions. [2022-07-12 18:54:20,824 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 140 transitions. Word has length 50 [2022-07-12 18:54:20,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:20,825 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 140 transitions. [2022-07-12 18:54:20,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:54:20,825 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 140 transitions. [2022-07-12 18:54:20,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-12 18:54:20,826 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:20,826 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:54:20,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-07-12 18:54:21,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-12 18:54:21,230 WARN L477 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 [2022-07-12 18:54:21,231 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:54:21,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:21,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1908613481, now seen corresponding path program 1 times [2022-07-12 18:54:21,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:21,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879525331] [2022-07-12 18:54:21,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:21,232 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:21,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:21,240 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) [2022-07-12 18:54:21,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-12 18:54:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:21,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 18:54:21,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:21,427 INFO L390 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 [2022-07-12 18:54:21,550 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-12 18:54:21,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-12 18:54:21,563 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-12 18:54:21,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:54:21,718 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-12 18:54:21,718 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:21,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879525331] [2022-07-12 18:54:21,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879525331] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:54:21,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:54:21,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2022-07-12 18:54:21,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226405602] [2022-07-12 18:54:21,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:54:21,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:54:21,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:21,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:54:21,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:54:21,721 INFO L87 Difference]: Start difference. First operand 112 states and 140 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:54:21,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:21,985 INFO L93 Difference]: Finished difference Result 124 states and 151 transitions. [2022-07-12 18:54:21,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:54:21,986 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-07-12 18:54:21,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:21,987 INFO L225 Difference]: With dead ends: 124 [2022-07-12 18:54:21,987 INFO L226 Difference]: Without dead ends: 124 [2022-07-12 18:54:21,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:54:21,988 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 51 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:54:21,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 311 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-07-12 18:54:21,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-12 18:54:21,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 98. [2022-07-12 18:54:21,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 81 states have (on average 1.2592592592592593) internal successors, (102), 91 states have internal predecessors, (102), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-12 18:54:21,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 113 transitions. [2022-07-12 18:54:21,992 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 113 transitions. Word has length 50 [2022-07-12 18:54:21,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:21,992 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 113 transitions. [2022-07-12 18:54:21,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:54:21,992 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 113 transitions. [2022-07-12 18:54:21,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 18:54:21,993 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:21,993 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:54:22,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-12 18:54:22,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:54:22,206 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:54:22,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:22,206 INFO L85 PathProgramCache]: Analyzing trace with hash -226568731, now seen corresponding path program 1 times [2022-07-12 18:54:22,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:22,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815469892] [2022-07-12 18:54:22,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:22,206 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:22,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:22,208 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:54:22,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-12 18:54:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:22,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:54:22,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-12 18:54:22,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:54:22,383 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:22,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815469892] [2022-07-12 18:54:22,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815469892] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:54:22,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:54:22,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:54:22,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809147864] [2022-07-12 18:54:22,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:54:22,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:54:22,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:22,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:54:22,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:54:22,386 INFO L87 Difference]: Start difference. First operand 98 states and 113 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 18:54:22,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:22,444 INFO L93 Difference]: Finished difference Result 118 states and 134 transitions. [2022-07-12 18:54:22,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:54:22,444 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2022-07-12 18:54:22,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:22,445 INFO L225 Difference]: With dead ends: 118 [2022-07-12 18:54:22,445 INFO L226 Difference]: Without dead ends: 118 [2022-07-12 18:54:22,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:54:22,446 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 16 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:54:22,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 194 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:54:22,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-12 18:54:22,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 100. [2022-07-12 18:54:22,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 83 states have (on average 1.2409638554216869) internal successors, (103), 92 states have internal predecessors, (103), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-12 18:54:22,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2022-07-12 18:54:22,450 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 52 [2022-07-12 18:54:22,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:22,450 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2022-07-12 18:54:22,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 18:54:22,450 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2022-07-12 18:54:22,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 18:54:22,450 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:22,451 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:54:22,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-12 18:54:22,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:54:22,663 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:54:22,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:22,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1516241604, now seen corresponding path program 1 times [2022-07-12 18:54:22,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:22,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080036954] [2022-07-12 18:54:22,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:22,664 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:22,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:22,665 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) [2022-07-12 18:54:22,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-12 18:54:22,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:22,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:54:22,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-12 18:54:22,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:54:22,831 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:22,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080036954] [2022-07-12 18:54:22,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1080036954] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:54:22,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:54:22,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:54:22,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544197266] [2022-07-12 18:54:22,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:54:22,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:54:22,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:22,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:54:22,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:54:22,834 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:54:22,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:22,912 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions. [2022-07-12 18:54:22,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:54:22,913 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-07-12 18:54:22,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:22,914 INFO L225 Difference]: With dead ends: 113 [2022-07-12 18:54:22,914 INFO L226 Difference]: Without dead ends: 113 [2022-07-12 18:54:22,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:54:22,915 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 21 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 138 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 [2022-07-12 18:54:22,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 138 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:54:22,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-12 18:54:22,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 102. [2022-07-12 18:54:22,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 94 states have internal predecessors, (105), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-12 18:54:22,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 116 transitions. [2022-07-12 18:54:22,918 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 116 transitions. Word has length 52 [2022-07-12 18:54:22,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:22,918 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 116 transitions. [2022-07-12 18:54:22,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:54:22,919 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 116 transitions. [2022-07-12 18:54:22,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 18:54:22,923 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:22,924 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:54:22,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-12 18:54:23,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:54:23,132 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:54:23,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:23,132 INFO L85 PathProgramCache]: Analyzing trace with hash -840525585, now seen corresponding path program 1 times [2022-07-12 18:54:23,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:23,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820682282] [2022-07-12 18:54:23,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:23,132 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:23,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:23,135 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) [2022-07-12 18:54:23,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-12 18:54:23,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:23,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 18:54:23,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:23,349 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-12 18:54:23,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:54:23,442 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-12 18:54:23,442 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:23,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820682282] [2022-07-12 18:54:23,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820682282] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:54:23,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:54:23,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-12 18:54:23,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41625035] [2022-07-12 18:54:23,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:54:23,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:54:23,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:23,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:54:23,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:54:23,443 INFO L87 Difference]: Start difference. First operand 102 states and 116 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:54:23,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:23,607 INFO L93 Difference]: Finished difference Result 223 states and 254 transitions. [2022-07-12 18:54:23,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:54:23,608 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 55 [2022-07-12 18:54:23,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:23,610 INFO L225 Difference]: With dead ends: 223 [2022-07-12 18:54:23,610 INFO L226 Difference]: Without dead ends: 223 [2022-07-12 18:54:23,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:54:23,611 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 274 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:54:23,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 214 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:54:23,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-12 18:54:23,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 134. [2022-07-12 18:54:23,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 113 states have (on average 1.247787610619469) internal successors, (141), 120 states have internal predecessors, (141), 8 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-12 18:54:23,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 164 transitions. [2022-07-12 18:54:23,620 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 164 transitions. Word has length 55 [2022-07-12 18:54:23,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:23,620 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 164 transitions. [2022-07-12 18:54:23,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:54:23,621 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 164 transitions. [2022-07-12 18:54:23,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 18:54:23,621 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:23,622 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:54:23,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-07-12 18:54:23,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:54:23,832 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:54:23,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:23,833 INFO L85 PathProgramCache]: Analyzing trace with hash 181256032, now seen corresponding path program 1 times [2022-07-12 18:54:23,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:23,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1698069460] [2022-07-12 18:54:23,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:23,833 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:23,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:23,835 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) [2022-07-12 18:54:23,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-12 18:54:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:23,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 18:54:23,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:24,220 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-12 18:54:24,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:54:24,370 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-12 18:54:24,371 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:24,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1698069460] [2022-07-12 18:54:24,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1698069460] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:54:24,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:54:24,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-07-12 18:54:24,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69029096] [2022-07-12 18:54:24,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:54:24,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:54:24,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:24,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:54:24,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:54:24,373 INFO L87 Difference]: Start difference. First operand 134 states and 164 transitions. Second operand has 10 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:54:24,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:24,479 INFO L93 Difference]: Finished difference Result 137 states and 166 transitions. [2022-07-12 18:54:24,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:54:24,480 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 55 [2022-07-12 18:54:24,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:24,481 INFO L225 Difference]: With dead ends: 137 [2022-07-12 18:54:24,481 INFO L226 Difference]: Without dead ends: 135 [2022-07-12 18:54:24,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:54:24,482 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 81 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:54:24,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 192 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 8 Unchecked, 0.1s Time] [2022-07-12 18:54:24,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-12 18:54:24,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-07-12 18:54:24,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 115 states have (on average 1.2260869565217392) internal successors, (141), 120 states have internal predecessors, (141), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-12 18:54:24,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 164 transitions. [2022-07-12 18:54:24,487 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 164 transitions. Word has length 55 [2022-07-12 18:54:24,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:24,488 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 164 transitions. [2022-07-12 18:54:24,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:54:24,488 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 164 transitions. [2022-07-12 18:54:24,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-12 18:54:24,489 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:24,489 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:54:24,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-12 18:54:24,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:54:24,700 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:54:24,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:24,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1024677531, now seen corresponding path program 1 times [2022-07-12 18:54:24,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:24,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802552387] [2022-07-12 18:54:24,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:24,701 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:24,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:24,703 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) [2022-07-12 18:54:24,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-12 18:54:24,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:24,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 18:54:24,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-12 18:54:25,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:54:29,413 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:29,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802552387] [2022-07-12 18:54:29,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802552387] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:54:29,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1144583947] [2022-07-12 18:54:29,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:29,414 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:54:29,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:54:29,415 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:54:29,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-07-12 18:54:29,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:29,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 18:54:29,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:30,150 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-12 18:54:30,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:54:34,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1144583947] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:54:34,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:54:34,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2022-07-12 18:54:34,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811209021] [2022-07-12 18:54:34,318 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:54:34,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 18:54:34,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:34,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 18:54:34,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=166, Unknown=2, NotChecked=0, Total=210 [2022-07-12 18:54:34,319 INFO L87 Difference]: Start difference. First operand 135 states and 164 transitions. Second operand has 12 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 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) [2022-07-12 18:54:34,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:34,395 INFO L93 Difference]: Finished difference Result 148 states and 174 transitions. [2022-07-12 18:54:34,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:54:34,395 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 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 58 [2022-07-12 18:54:34,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:34,396 INFO L225 Difference]: With dead ends: 148 [2022-07-12 18:54:34,396 INFO L226 Difference]: Without dead ends: 138 [2022-07-12 18:54:34,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 200 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=50, Invalid=220, Unknown=2, NotChecked=0, Total=272 [2022-07-12 18:54:34,397 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 19 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:54:34,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 362 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 118 Unchecked, 0.1s Time] [2022-07-12 18:54:34,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-12 18:54:34,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 124. [2022-07-12 18:54:34,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 103 states have (on average 1.203883495145631) internal successors, (124), 110 states have internal predecessors, (124), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-12 18:54:34,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 147 transitions. [2022-07-12 18:54:34,402 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 147 transitions. Word has length 58 [2022-07-12 18:54:34,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:34,402 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 147 transitions. [2022-07-12 18:54:34,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 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) [2022-07-12 18:54:34,403 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 147 transitions. [2022-07-12 18:54:34,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-12 18:54:34,403 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:34,403 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:54:34,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-12 18:54:34,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2022-07-12 18:54:34,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 18:54:34,812 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:54:34,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:34,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1043028556, now seen corresponding path program 1 times [2022-07-12 18:54:34,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:34,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [944003905] [2022-07-12 18:54:34,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:34,813 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:34,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:34,814 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) [2022-07-12 18:54:34,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-12 18:54:34,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:35,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 18:54:35,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:35,023 INFO L390 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 [2022-07-12 18:54:35,028 INFO L390 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 [2022-07-12 18:54:35,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:54:35,346 INFO L390 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 [2022-07-12 18:54:35,354 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:54:35,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:54:35,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:54:35,467 INFO L390 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 [2022-07-12 18:54:35,477 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:54:35,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:54:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-12 18:54:35,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:54:36,022 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:36,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [944003905] [2022-07-12 18:54:36,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [944003905] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:54:36,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1575016028] [2022-07-12 18:54:36,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:36,023 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:54:36,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:54:36,034 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:54:36,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-07-12 18:54:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:36,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 18:54:36,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:36,426 INFO L390 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 [2022-07-12 18:54:36,432 INFO L390 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 [2022-07-12 18:54:36,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:54:36,677 INFO L390 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 [2022-07-12 18:54:36,684 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:54:36,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:54:36,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:54:36,764 INFO L390 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 [2022-07-12 18:54:36,778 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:54:36,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:54:36,793 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-12 18:54:36,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:54:37,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1575016028] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:54:37,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:54:37,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2022-07-12 18:54:37,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156215890] [2022-07-12 18:54:37,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:54:37,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 18:54:37,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:37,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 18:54:37,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-07-12 18:54:37,113 INFO L87 Difference]: Start difference. First operand 124 states and 147 transitions. Second operand has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 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) [2022-07-12 18:54:37,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:37,739 INFO L93 Difference]: Finished difference Result 168 states and 188 transitions. [2022-07-12 18:54:37,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 18:54:37,740 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 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 60 [2022-07-12 18:54:37,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:37,741 INFO L225 Difference]: With dead ends: 168 [2022-07-12 18:54:37,741 INFO L226 Difference]: Without dead ends: 168 [2022-07-12 18:54:37,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-07-12 18:54:37,742 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 69 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:54:37,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 419 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 396 Invalid, 0 Unknown, 53 Unchecked, 0.5s Time] [2022-07-12 18:54:37,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-12 18:54:37,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 124. [2022-07-12 18:54:37,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 103 states have (on average 1.1844660194174756) internal successors, (122), 110 states have internal predecessors, (122), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-12 18:54:37,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 145 transitions. [2022-07-12 18:54:37,746 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 145 transitions. Word has length 60 [2022-07-12 18:54:37,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:37,747 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 145 transitions. [2022-07-12 18:54:37,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 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) [2022-07-12 18:54:37,747 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 145 transitions. [2022-07-12 18:54:37,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-12 18:54:37,747 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:37,747 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:54:37,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-12 18:54:37,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2022-07-12 18:54:38,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 18:54:38,148 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:54:38,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:38,149 INFO L85 PathProgramCache]: Analyzing trace with hash -929144456, now seen corresponding path program 1 times [2022-07-12 18:54:38,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:38,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302614857] [2022-07-12 18:54:38,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:38,149 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:38,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:38,150 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:54:38,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-12 18:54:38,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:38,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 18:54:38,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-12 18:54:38,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:54:39,218 INFO L390 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 11 treesize of output 9 [2022-07-12 18:54:39,718 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-12 18:54:39,718 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:39,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302614857] [2022-07-12 18:54:39,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302614857] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:54:39,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:54:39,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-07-12 18:54:39,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137703101] [2022-07-12 18:54:39,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:54:39,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 18:54:39,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:39,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 18:54:39,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-07-12 18:54:39,720 INFO L87 Difference]: Start difference. First operand 124 states and 145 transitions. Second operand has 18 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 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) [2022-07-12 18:54:42,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:42,179 INFO L93 Difference]: Finished difference Result 227 states and 254 transitions. [2022-07-12 18:54:42,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 18:54:42,180 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 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 62 [2022-07-12 18:54:42,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:42,181 INFO L225 Difference]: With dead ends: 227 [2022-07-12 18:54:42,181 INFO L226 Difference]: Without dead ends: 227 [2022-07-12 18:54:42,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2022-07-12 18:54:42,182 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 380 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:54:42,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 374 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 246 Invalid, 0 Unknown, 51 Unchecked, 1.1s Time] [2022-07-12 18:54:42,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-07-12 18:54:42,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 128. [2022-07-12 18:54:42,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 113 states have internal predecessors, (127), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-12 18:54:42,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 150 transitions. [2022-07-12 18:54:42,188 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 150 transitions. Word has length 62 [2022-07-12 18:54:42,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:42,188 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 150 transitions. [2022-07-12 18:54:42,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 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) [2022-07-12 18:54:42,189 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 150 transitions. [2022-07-12 18:54:42,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-12 18:54:42,189 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:42,190 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:54:42,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-07-12 18:54:42,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:54:42,401 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:54:42,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:42,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1261292942, now seen corresponding path program 1 times [2022-07-12 18:54:42,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:42,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527360938] [2022-07-12 18:54:42,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:42,402 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:42,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:42,403 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) [2022-07-12 18:54:42,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-12 18:54:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:42,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 18:54:42,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:42,672 INFO L390 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 [2022-07-12 18:54:42,833 INFO L390 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 [2022-07-12 18:54:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-12 18:54:42,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:54:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-12 18:54:43,040 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:43,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527360938] [2022-07-12 18:54:43,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527360938] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:54:43,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:54:43,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2022-07-12 18:54:43,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115145923] [2022-07-12 18:54:43,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:54:43,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 18:54:43,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:43,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 18:54:43,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-07-12 18:54:43,041 INFO L87 Difference]: Start difference. First operand 128 states and 150 transitions. Second operand has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 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) [2022-07-12 18:54:43,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:43,974 INFO L93 Difference]: Finished difference Result 182 states and 202 transitions. [2022-07-12 18:54:43,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 18:54:43,975 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 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 63 [2022-07-12 18:54:43,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:43,976 INFO L225 Difference]: With dead ends: 182 [2022-07-12 18:54:43,976 INFO L226 Difference]: Without dead ends: 182 [2022-07-12 18:54:43,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2022-07-12 18:54:43,977 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 256 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:54:43,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 429 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 312 Invalid, 0 Unknown, 37 Unchecked, 0.4s Time] [2022-07-12 18:54:43,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-07-12 18:54:43,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 135. [2022-07-12 18:54:43,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 113 states have (on average 1.176991150442478) internal successors, (133), 119 states have internal predecessors, (133), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-12 18:54:43,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 156 transitions. [2022-07-12 18:54:43,983 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 156 transitions. Word has length 63 [2022-07-12 18:54:43,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:43,983 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 156 transitions. [2022-07-12 18:54:43,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 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) [2022-07-12 18:54:43,984 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 156 transitions. [2022-07-12 18:54:43,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-12 18:54:43,984 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:43,984 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 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] [2022-07-12 18:54:43,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-07-12 18:54:44,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:54:44,196 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:54:44,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:44,196 INFO L85 PathProgramCache]: Analyzing trace with hash 445375639, now seen corresponding path program 1 times [2022-07-12 18:54:44,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:44,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145405830] [2022-07-12 18:54:44,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:44,196 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:44,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:44,197 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) [2022-07-12 18:54:44,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-12 18:54:44,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:44,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 18:54:44,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:44,856 INFO L390 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 [2022-07-12 18:54:45,194 INFO L390 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 [2022-07-12 18:54:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-12 18:54:45,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:54:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-12 18:54:45,683 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:45,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145405830] [2022-07-12 18:54:45,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [145405830] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:54:45,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:54:45,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 22 [2022-07-12 18:54:45,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763686190] [2022-07-12 18:54:45,684 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:54:45,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 18:54:45,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:45,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 18:54:45,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-07-12 18:54:45,685 INFO L87 Difference]: Start difference. First operand 135 states and 156 transitions. Second operand has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 20 states have internal predecessors, (59), 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) [2022-07-12 18:54:45,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:45,942 INFO L93 Difference]: Finished difference Result 197 states and 223 transitions. [2022-07-12 18:54:45,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 18:54:45,944 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 20 states have internal predecessors, (59), 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 64 [2022-07-12 18:54:45,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:45,945 INFO L225 Difference]: With dead ends: 197 [2022-07-12 18:54:45,945 INFO L226 Difference]: Without dead ends: 197 [2022-07-12 18:54:45,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-07-12 18:54:45,946 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 40 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:54:45,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 446 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 76 Invalid, 0 Unknown, 78 Unchecked, 0.1s Time] [2022-07-12 18:54:45,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-07-12 18:54:45,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 169. [2022-07-12 18:54:45,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 141 states have (on average 1.198581560283688) internal successors, (169), 149 states have internal predecessors, (169), 10 states have call successors, (10), 6 states have call predecessors, (10), 10 states have return successors, (19), 13 states have call predecessors, (19), 10 states have call successors, (19) [2022-07-12 18:54:45,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 198 transitions. [2022-07-12 18:54:45,951 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 198 transitions. Word has length 64 [2022-07-12 18:54:45,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:45,952 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 198 transitions. [2022-07-12 18:54:45,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 20 states have internal predecessors, (59), 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) [2022-07-12 18:54:45,952 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 198 transitions. [2022-07-12 18:54:45,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-12 18:54:45,953 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:45,953 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 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] [2022-07-12 18:54:45,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-12 18:54:46,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:54:46,160 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:54:46,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:46,160 INFO L85 PathProgramCache]: Analyzing trace with hash 36551414, now seen corresponding path program 2 times [2022-07-12 18:54:46,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:46,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066147392] [2022-07-12 18:54:46,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:54:46,160 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:46,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:46,161 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:54:46,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-12 18:54:46,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:54:46,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:54:46,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 18:54:46,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:46,364 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-12 18:54:46,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:54:46,365 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:46,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066147392] [2022-07-12 18:54:46,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2066147392] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:54:46,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:54:46,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:54:46,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9544816] [2022-07-12 18:54:46,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:54:46,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:54:46,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:46,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:54:46,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:54:46,366 INFO L87 Difference]: Start difference. First operand 169 states and 198 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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) [2022-07-12 18:54:46,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:46,384 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2022-07-12 18:54:46,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:54:46,385 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 64 [2022-07-12 18:54:46,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:46,385 INFO L225 Difference]: With dead ends: 128 [2022-07-12 18:54:46,385 INFO L226 Difference]: Without dead ends: 124 [2022-07-12 18:54:46,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:54:46,386 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 23 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 170 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 [2022-07-12 18:54:46,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 170 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:54:46,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-12 18:54:46,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 114. [2022-07-12 18:54:46,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 96 states have (on average 1.1354166666666667) internal successors, (109), 102 states have internal predecessors, (109), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-12 18:54:46,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2022-07-12 18:54:46,389 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 64 [2022-07-12 18:54:46,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:46,389 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2022-07-12 18:54:46,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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) [2022-07-12 18:54:46,389 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2022-07-12 18:54:46,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-12 18:54:46,390 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:46,390 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 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] [2022-07-12 18:54:46,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-12 18:54:46,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:54:46,600 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:54:46,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:46,600 INFO L85 PathProgramCache]: Analyzing trace with hash 921743024, now seen corresponding path program 1 times [2022-07-12 18:54:46,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:46,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834425119] [2022-07-12 18:54:46,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:46,601 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:46,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:46,602 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) [2022-07-12 18:54:46,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-12 18:54:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:46,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 18:54:46,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:46,873 INFO L390 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 [2022-07-12 18:54:46,929 INFO L390 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 [2022-07-12 18:54:46,987 INFO L390 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 3 [2022-07-12 18:54:47,057 INFO L390 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 17 treesize of output 9 [2022-07-12 18:54:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-12 18:54:47,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:54:47,342 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-12 18:54:47,342 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:47,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834425119] [2022-07-12 18:54:47,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834425119] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:54:47,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:54:47,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 19 [2022-07-12 18:54:47,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973849482] [2022-07-12 18:54:47,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:54:47,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 18:54:47,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:47,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 18:54:47,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2022-07-12 18:54:47,344 INFO L87 Difference]: Start difference. First operand 114 states and 122 transitions. Second operand has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 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) [2022-07-12 18:54:48,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:48,357 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2022-07-12 18:54:48,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 18:54:48,358 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 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 65 [2022-07-12 18:54:48,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:48,359 INFO L225 Difference]: With dead ends: 130 [2022-07-12 18:54:48,359 INFO L226 Difference]: Without dead ends: 130 [2022-07-12 18:54:48,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 18:54:48,360 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 88 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:54:48,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 450 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 518 Invalid, 0 Unknown, 49 Unchecked, 0.5s Time] [2022-07-12 18:54:48,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-12 18:54:48,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 115. [2022-07-12 18:54:48,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 97 states have (on average 1.134020618556701) internal successors, (110), 103 states have internal predecessors, (110), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-12 18:54:48,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 123 transitions. [2022-07-12 18:54:48,363 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 123 transitions. Word has length 65 [2022-07-12 18:54:48,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:48,364 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 123 transitions. [2022-07-12 18:54:48,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 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) [2022-07-12 18:54:48,364 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 123 transitions. [2022-07-12 18:54:48,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-12 18:54:48,364 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:48,364 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 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] [2022-07-12 18:54:48,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-12 18:54:48,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:54:48,575 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:54:48,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:48,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1490737222, now seen corresponding path program 1 times [2022-07-12 18:54:48,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:48,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1800602692] [2022-07-12 18:54:48,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:48,576 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:48,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:48,578 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) [2022-07-12 18:54:48,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-12 18:54:48,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:48,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 18:54:48,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:48,796 INFO L390 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 [2022-07-12 18:54:48,970 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 18:54:48,971 INFO L390 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 18 treesize of output 25 [2022-07-12 18:54:49,032 INFO L390 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 [2022-07-12 18:54:49,103 INFO L390 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 [2022-07-12 18:54:55,245 INFO L390 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 [2022-07-12 18:54:55,279 INFO L390 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 15 treesize of output 17 [2022-07-12 18:54:55,295 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-12 18:54:55,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:54:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-12 18:54:55,962 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:55,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1800602692] [2022-07-12 18:54:55,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1800602692] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:54:55,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:54:55,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2022-07-12 18:54:55,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269819929] [2022-07-12 18:54:55,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:54:55,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-12 18:54:55,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:55,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-12 18:54:55,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=619, Unknown=2, NotChecked=0, Total=702 [2022-07-12 18:54:55,963 INFO L87 Difference]: Start difference. First operand 115 states and 123 transitions. Second operand has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 23 states have internal predecessors, (59), 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) [2022-07-12 18:54:57,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:57,058 INFO L93 Difference]: Finished difference Result 137 states and 143 transitions. [2022-07-12 18:54:57,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-12 18:54:57,059 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 23 states have internal predecessors, (59), 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 66 [2022-07-12 18:54:57,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:57,060 INFO L225 Difference]: With dead ends: 137 [2022-07-12 18:54:57,060 INFO L226 Difference]: Without dead ends: 137 [2022-07-12 18:54:57,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=175, Invalid=1463, Unknown=2, NotChecked=0, Total=1640 [2022-07-12 18:54:57,061 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 88 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:54:57,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 487 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 554 Invalid, 0 Unknown, 107 Unchecked, 0.5s Time] [2022-07-12 18:54:57,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-12 18:54:57,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 118. [2022-07-12 18:54:57,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 99 states have (on average 1.1313131313131313) internal successors, (112), 106 states have internal predecessors, (112), 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) [2022-07-12 18:54:57,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 125 transitions. [2022-07-12 18:54:57,064 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 125 transitions. Word has length 66 [2022-07-12 18:54:57,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:57,064 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 125 transitions. [2022-07-12 18:54:57,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 23 states have internal predecessors, (59), 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) [2022-07-12 18:54:57,064 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 125 transitions. [2022-07-12 18:54:57,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-12 18:54:57,065 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:57,065 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:54:57,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-12 18:54:57,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:54:57,276 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:54:57,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:57,277 INFO L85 PathProgramCache]: Analyzing trace with hash -280378112, now seen corresponding path program 2 times [2022-07-12 18:54:57,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:57,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646926970] [2022-07-12 18:54:57,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:54:57,277 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:57,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:57,278 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) [2022-07-12 18:54:57,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-12 18:54:57,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:54:57,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:54:57,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-12 18:54:57,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:57,594 INFO L390 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 [2022-07-12 18:54:57,599 INFO L390 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 [2022-07-12 18:54:57,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:54:57,920 INFO L390 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 [2022-07-12 18:54:57,927 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:54:57,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:54:58,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:54:58,047 INFO L390 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 [2022-07-12 18:54:58,055 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:54:58,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:54:58,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:54:58,181 INFO L390 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 [2022-07-12 18:54:58,191 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:54:58,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:54:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-07-12 18:54:58,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:54:58,767 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:58,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646926970] [2022-07-12 18:54:58,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1646926970] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:54:58,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2036121471] [2022-07-12 18:54:58,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:54:58,768 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:54:58,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:54:58,771 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) [2022-07-12 18:54:58,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-07-12 18:54:59,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:54:59,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:54:59,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-12 18:54:59,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:59,226 INFO L390 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 [2022-07-12 18:54:59,230 INFO L390 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 [2022-07-12 18:54:59,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:54:59,463 INFO L390 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 [2022-07-12 18:54:59,473 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:54:59,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:54:59,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:54:59,600 INFO L390 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 [2022-07-12 18:54:59,609 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:54:59,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:55:01,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:55:01,726 INFO L390 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 [2022-07-12 18:55:01,733 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:55:01,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:55:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-07-12 18:55:01,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:55:04,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2036121471] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:55:04,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:55:04,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2022-07-12 18:55:04,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48335921] [2022-07-12 18:55:04,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:55:04,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 18:55:04,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:55:04,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 18:55:04,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:55:04,116 INFO L87 Difference]: Start difference. First operand 118 states and 125 transitions. Second operand has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 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) [2022-07-12 18:55:06,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:55:06,691 INFO L93 Difference]: Finished difference Result 174 states and 181 transitions. [2022-07-12 18:55:06,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:55:06,691 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 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 70 [2022-07-12 18:55:06,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:55:06,692 INFO L225 Difference]: With dead ends: 174 [2022-07-12 18:55:06,692 INFO L226 Difference]: Without dead ends: 174 [2022-07-12 18:55:06,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 124 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=59, Invalid=320, Unknown=1, NotChecked=0, Total=380 [2022-07-12 18:55:06,693 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 91 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:55:06,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 501 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 430 Invalid, 0 Unknown, 52 Unchecked, 0.5s Time] [2022-07-12 18:55:06,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-07-12 18:55:06,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 118. [2022-07-12 18:55:06,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 99 states have (on average 1.121212121212121) internal successors, (111), 106 states have internal predecessors, (111), 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) [2022-07-12 18:55:06,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 124 transitions. [2022-07-12 18:55:06,697 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 124 transitions. Word has length 70 [2022-07-12 18:55:06,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:55:06,698 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 124 transitions. [2022-07-12 18:55:06,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 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) [2022-07-12 18:55:06,698 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 124 transitions. [2022-07-12 18:55:06,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-12 18:55:06,699 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:55:06,699 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 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, 1, 1, 1] [2022-07-12 18:55:06,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-07-12 18:55:06,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-07-12 18:55:07,112 WARN L477 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 [2022-07-12 18:55:07,112 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:55:07,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:55:07,113 INFO L85 PathProgramCache]: Analyzing trace with hash -590692744, now seen corresponding path program 1 times [2022-07-12 18:55:07,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:55:07,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90250362] [2022-07-12 18:55:07,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:55:07,113 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:55:07,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:55:07,114 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) [2022-07-12 18:55:07,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-12 18:55:07,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:55:07,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 18:55:07,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:55:07,337 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-07-12 18:55:07,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:55:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-07-12 18:55:07,425 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:55:07,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90250362] [2022-07-12 18:55:07,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90250362] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:55:07,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:55:07,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-12 18:55:07,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120031458] [2022-07-12 18:55:07,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:55:07,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:55:07,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:55:07,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:55:07,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:55:07,427 INFO L87 Difference]: Start difference. First operand 118 states and 124 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 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) [2022-07-12 18:55:07,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:55:07,552 INFO L93 Difference]: Finished difference Result 142 states and 146 transitions. [2022-07-12 18:55:07,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:55:07,552 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 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 69 [2022-07-12 18:55:07,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:55:07,553 INFO L225 Difference]: With dead ends: 142 [2022-07-12 18:55:07,553 INFO L226 Difference]: Without dead ends: 142 [2022-07-12 18:55:07,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:55:07,554 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 64 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:55:07,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 219 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:55:07,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-12 18:55:07,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 125. [2022-07-12 18:55:07,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 106 states have (on average 1.1132075471698113) internal successors, (118), 113 states have internal predecessors, (118), 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) [2022-07-12 18:55:07,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 131 transitions. [2022-07-12 18:55:07,558 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 131 transitions. Word has length 69 [2022-07-12 18:55:07,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:55:07,558 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 131 transitions. [2022-07-12 18:55:07,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 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) [2022-07-12 18:55:07,558 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 131 transitions. [2022-07-12 18:55:07,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-12 18:55:07,559 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:55:07,559 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 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, 1, 1, 1] [2022-07-12 18:55:07,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-12 18:55:07,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:55:07,770 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:55:07,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:55:07,771 INFO L85 PathProgramCache]: Analyzing trace with hash -513282356, now seen corresponding path program 1 times [2022-07-12 18:55:07,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:55:07,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774300949] [2022-07-12 18:55:07,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:55:07,771 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:55:07,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:55:07,772 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) [2022-07-12 18:55:07,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-12 18:55:07,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:55:07,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:55:07,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:55:08,013 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-07-12 18:55:08,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:55:08,033 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 18:55:08,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-07-12 18:55:08,066 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-07-12 18:55:08,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:55:08,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774300949] [2022-07-12 18:55:08,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774300949] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:55:08,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:55:08,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2022-07-12 18:55:08,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891125060] [2022-07-12 18:55:08,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:55:08,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:55:08,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:55:08,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:55:08,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:55:08,068 INFO L87 Difference]: Start difference. First operand 125 states and 131 transitions. Second operand has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 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) [2022-07-12 18:55:08,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:55:08,145 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2022-07-12 18:55:08,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:55:08,146 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 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 73 [2022-07-12 18:55:08,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:55:08,146 INFO L225 Difference]: With dead ends: 130 [2022-07-12 18:55:08,146 INFO L226 Difference]: Without dead ends: 130 [2022-07-12 18:55:08,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:55:08,147 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 39 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:55:08,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 66 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:55:08,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-12 18:55:08,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-07-12 18:55:08,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 111 states have (on average 1.1081081081081081) internal successors, (123), 118 states have internal predecessors, (123), 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) [2022-07-12 18:55:08,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 136 transitions. [2022-07-12 18:55:08,150 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 136 transitions. Word has length 73 [2022-07-12 18:55:08,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:55:08,151 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 136 transitions. [2022-07-12 18:55:08,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 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) [2022-07-12 18:55:08,151 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 136 transitions. [2022-07-12 18:55:08,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-12 18:55:08,152 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:55:08,152 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 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, 1, 1] [2022-07-12 18:55:08,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-07-12 18:55:08,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:55:08,364 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:55:08,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:55:08,365 INFO L85 PathProgramCache]: Analyzing trace with hash 230335872, now seen corresponding path program 1 times [2022-07-12 18:55:08,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:55:08,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051139093] [2022-07-12 18:55:08,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:55:08,365 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:55:08,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:55:08,367 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) [2022-07-12 18:55:08,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-12 18:55:08,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:55:08,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 18:55:08,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:55:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-07-12 18:55:08,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:55:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-07-12 18:55:08,711 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:55:08,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051139093] [2022-07-12 18:55:08,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051139093] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:55:08,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:55:08,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-12 18:55:08,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175699985] [2022-07-12 18:55:08,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:55:08,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:55:08,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:55:08,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:55:08,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:55:08,712 INFO L87 Difference]: Start difference. First operand 130 states and 136 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 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) [2022-07-12 18:55:08,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:55:08,968 INFO L93 Difference]: Finished difference Result 170 states and 173 transitions. [2022-07-12 18:55:08,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:55:08,970 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 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 76 [2022-07-12 18:55:08,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:55:08,971 INFO L225 Difference]: With dead ends: 170 [2022-07-12 18:55:08,971 INFO L226 Difference]: Without dead ends: 170 [2022-07-12 18:55:08,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-07-12 18:55:08,972 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 264 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:55:08,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 241 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:55:08,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-12 18:55:08,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 135. [2022-07-12 18:55:08,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 117 states have (on average 1.0854700854700854) internal successors, (127), 122 states have internal predecessors, (127), 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) [2022-07-12 18:55:08,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 140 transitions. [2022-07-12 18:55:08,976 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 140 transitions. Word has length 76 [2022-07-12 18:55:08,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:55:08,976 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 140 transitions. [2022-07-12 18:55:08,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 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) [2022-07-12 18:55:08,976 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 140 transitions. [2022-07-12 18:55:08,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-12 18:55:08,977 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:55:08,977 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 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, 1, 1, 1, 1, 1] [2022-07-12 18:55:08,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-12 18:55:09,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:55:09,188 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:55:09,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:55:09,189 INFO L85 PathProgramCache]: Analyzing trace with hash 656898895, now seen corresponding path program 1 times [2022-07-12 18:55:09,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:55:09,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [909208883] [2022-07-12 18:55:09,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:55:09,190 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:55:09,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:55:09,191 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:55:09,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-12 18:55:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:55:09,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-12 18:55:09,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:55:10,128 INFO L390 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 [2022-07-12 18:55:10,301 INFO L356 Elim1Store]: treesize reduction 6, result has 50.0 percent of original size [2022-07-12 18:55:10,301 INFO L390 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 39 treesize of output 37 [2022-07-12 18:55:10,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-07-12 18:55:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-12 18:55:14,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:55:23,172 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:55:23,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [909208883] [2022-07-12 18:55:23,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [909208883] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:55:23,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1203384459] [2022-07-12 18:55:23,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:55:23,172 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:55:23,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:55:23,173 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:55:23,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-07-12 18:55:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:55:24,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-12 18:55:24,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:55:28,879 INFO L390 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 [2022-07-12 18:55:29,124 INFO L356 Elim1Store]: treesize reduction 27, result has 18.2 percent of original size [2022-07-12 18:55:29,125 INFO L390 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 44 treesize of output 40 [2022-07-12 18:55:29,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-07-12 18:55:43,850 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-12 18:55:43,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:55:46,357 INFO L390 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 22 treesize of output 20 [2022-07-12 18:55:57,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1203384459] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:55:57,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:55:57,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2022-07-12 18:55:57,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699184854] [2022-07-12 18:55:57,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:55:57,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-12 18:55:57,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:55:57,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-12 18:55:57,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2152, Unknown=19, NotChecked=0, Total=2352 [2022-07-12 18:55:57,209 INFO L87 Difference]: Start difference. First operand 135 states and 140 transitions. Second operand has 31 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 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) [2022-07-12 18:55:57,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:55:57,332 INFO L93 Difference]: Finished difference Result 142 states and 146 transitions. [2022-07-12 18:55:57,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 18:55:57,332 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 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 75 [2022-07-12 18:55:57,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:55:57,333 INFO L225 Difference]: With dead ends: 142 [2022-07-12 18:55:57,333 INFO L226 Difference]: Without dead ends: 122 [2022-07-12 18:55:57,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 156 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=192, Invalid=2339, Unknown=19, NotChecked=0, Total=2550 [2022-07-12 18:55:57,335 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:55:57,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 444 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 187 Unchecked, 0.0s Time] [2022-07-12 18:55:57,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-12 18:55:57,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-07-12 18:55:57,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 105 states have (on average 1.0857142857142856) internal successors, (114), 110 states have internal predecessors, (114), 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) [2022-07-12 18:55:57,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2022-07-12 18:55:57,338 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 75 [2022-07-12 18:55:57,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:55:57,338 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2022-07-12 18:55:57,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 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) [2022-07-12 18:55:57,339 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2022-07-12 18:55:57,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-12 18:55:57,339 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:55:57,339 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:55:57,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-07-12 18:55:57,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-07-12 18:55:57,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:55:57,740 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:55:57,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:55:57,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1246142796, now seen corresponding path program 3 times [2022-07-12 18:55:57,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:55:57,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522816669] [2022-07-12 18:55:57,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:55:57,741 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:55:57,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:55:57,742 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) [2022-07-12 18:55:57,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-12 18:55:57,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-12 18:55:57,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:55:57,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-12 18:55:57,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:55:58,004 INFO L390 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 [2022-07-12 18:55:58,008 INFO L390 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 [2022-07-12 18:55:58,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:55:58,290 INFO L390 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 [2022-07-12 18:55:58,298 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:55:58,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:55:58,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:55:58,412 INFO L390 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 [2022-07-12 18:55:58,430 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:55:58,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:56:00,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:00,571 INFO L390 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 [2022-07-12 18:56:00,579 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:56:00,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:56:02,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:02,720 INFO L390 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 [2022-07-12 18:56:02,729 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:56:02,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:56:02,767 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-07-12 18:56:02,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:56:09,248 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:56:09,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522816669] [2022-07-12 18:56:09,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1522816669] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:56:09,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [354380391] [2022-07-12 18:56:09,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:56:09,248 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:56:09,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:56:09,249 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:56:09,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-07-12 18:56:09,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-12 18:56:09,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:56:09,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-12 18:56:09,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:56:09,622 INFO L390 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 [2022-07-12 18:56:09,633 INFO L390 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 [2022-07-12 18:56:09,890 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:56:09,890 INFO L390 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 [2022-07-12 18:56:09,908 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:56:09,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:56:10,129 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:56:10,129 INFO L390 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 [2022-07-12 18:56:10,144 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:56:10,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:56:12,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:12,376 INFO L390 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 [2022-07-12 18:56:12,385 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:56:12,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:56:12,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:12,480 INFO L390 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 [2022-07-12 18:56:12,488 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:56:12,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:56:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-07-12 18:56:12,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:56:14,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [354380391] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:56:14,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:56:14,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 21 [2022-07-12 18:56:14,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379512902] [2022-07-12 18:56:14,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:56:14,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 18:56:14,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:56:14,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 18:56:14,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=480, Unknown=2, NotChecked=0, Total=552 [2022-07-12 18:56:14,818 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand has 22 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-12 18:56:15,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:56:15,484 INFO L93 Difference]: Finished difference Result 176 states and 182 transitions. [2022-07-12 18:56:15,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 18:56:15,485 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 80 [2022-07-12 18:56:15,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:56:15,486 INFO L225 Difference]: With dead ends: 176 [2022-07-12 18:56:15,486 INFO L226 Difference]: Without dead ends: 176 [2022-07-12 18:56:15,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 133 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=101, Invalid=709, Unknown=2, NotChecked=0, Total=812 [2022-07-12 18:56:15,487 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 75 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:56:15,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 592 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 588 Invalid, 0 Unknown, 52 Unchecked, 0.5s Time] [2022-07-12 18:56:15,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-07-12 18:56:15,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 126. [2022-07-12 18:56:15,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 108 states have (on average 1.0833333333333333) internal successors, (117), 113 states have internal predecessors, (117), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-12 18:56:15,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2022-07-12 18:56:15,491 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 80 [2022-07-12 18:56:15,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:56:15,491 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2022-07-12 18:56:15,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-12 18:56:15,491 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2022-07-12 18:56:15,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-12 18:56:15,492 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:56:15,492 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 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, 1, 1, 1] [2022-07-12 18:56:15,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-07-12 18:56:15,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-07-12 18:56:15,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 18:56:15,900 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:56:15,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:56:15,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1176035772, now seen corresponding path program 2 times [2022-07-12 18:56:15,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:56:15,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2466334] [2022-07-12 18:56:15,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:56:15,900 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:56:15,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:56:15,901 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) [2022-07-12 18:56:15,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-12 18:56:16,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:56:16,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:56:16,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 18:56:16,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:56:16,376 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-07-12 18:56:16,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:56:16,751 INFO L390 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 [2022-07-12 18:56:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-07-12 18:56:19,053 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:56:19,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2466334] [2022-07-12 18:56:19,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2466334] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:56:19,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:56:19,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2022-07-12 18:56:19,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187101716] [2022-07-12 18:56:19,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:56:19,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 18:56:19,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:56:19,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 18:56:19,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-07-12 18:56:19,055 INFO L87 Difference]: Start difference. First operand 126 states and 132 transitions. Second operand has 21 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 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) [2022-07-12 18:56:29,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:56:29,028 INFO L93 Difference]: Finished difference Result 311 states and 324 transitions. [2022-07-12 18:56:29,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-12 18:56:29,029 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 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 79 [2022-07-12 18:56:29,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:56:29,030 INFO L225 Difference]: With dead ends: 311 [2022-07-12 18:56:29,030 INFO L226 Difference]: Without dead ends: 311 [2022-07-12 18:56:29,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=484, Invalid=1772, Unknown=0, NotChecked=0, Total=2256 [2022-07-12 18:56:29,031 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 741 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:56:29,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 565 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-12 18:56:29,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-07-12 18:56:29,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 159. [2022-07-12 18:56:29,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 139 states have (on average 1.158273381294964) internal successors, (161), 144 states have internal predecessors, (161), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2022-07-12 18:56:29,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 182 transitions. [2022-07-12 18:56:29,041 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 182 transitions. Word has length 79 [2022-07-12 18:56:29,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:56:29,042 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 182 transitions. [2022-07-12 18:56:29,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 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) [2022-07-12 18:56:29,042 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 182 transitions. [2022-07-12 18:56:29,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-12 18:56:29,043 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:56:29,043 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 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, 1, 1, 1] [2022-07-12 18:56:29,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-07-12 18:56:29,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:56:29,255 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:56:29,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:56:29,255 INFO L85 PathProgramCache]: Analyzing trace with hash -2097370558, now seen corresponding path program 1 times [2022-07-12 18:56:29,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:56:29,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [662001201] [2022-07-12 18:56:29,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:56:29,256 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:56:29,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:56:29,257 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:56:29,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-07-12 18:56:29,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:56:29,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 18:56:29,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:56:29,679 INFO L390 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 [2022-07-12 18:56:29,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:29,798 INFO L390 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 [2022-07-12 18:56:29,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:29,939 INFO L390 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 [2022-07-12 18:56:29,974 INFO L390 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 [2022-07-12 18:56:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-12 18:56:29,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:56:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-07-12 18:56:30,268 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:56:30,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [662001201] [2022-07-12 18:56:30,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [662001201] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:56:30,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:56:30,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2022-07-12 18:56:30,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598046464] [2022-07-12 18:56:30,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:56:30,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 18:56:30,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:56:30,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 18:56:30,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-07-12 18:56:30,270 INFO L87 Difference]: Start difference. First operand 159 states and 182 transitions. Second operand has 22 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 19 states have internal predecessors, (73), 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) [2022-07-12 18:56:32,256 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 18:56:32,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:56:32,905 INFO L93 Difference]: Finished difference Result 210 states and 229 transitions. [2022-07-12 18:56:32,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-12 18:56:32,906 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 19 states have internal predecessors, (73), 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 80 [2022-07-12 18:56:32,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:56:32,907 INFO L225 Difference]: With dead ends: 210 [2022-07-12 18:56:32,907 INFO L226 Difference]: Without dead ends: 210 [2022-07-12 18:56:32,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 141 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=341, Invalid=2311, Unknown=0, NotChecked=0, Total=2652 [2022-07-12 18:56:32,909 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 268 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:56:32,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 596 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 516 Invalid, 0 Unknown, 45 Unchecked, 1.6s Time] [2022-07-12 18:56:32,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-07-12 18:56:32,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 172. [2022-07-12 18:56:32,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 150 states have (on average 1.1666666666666667) internal successors, (175), 156 states have internal predecessors, (175), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2022-07-12 18:56:32,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 196 transitions. [2022-07-12 18:56:32,912 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 196 transitions. Word has length 80 [2022-07-12 18:56:32,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:56:32,913 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 196 transitions. [2022-07-12 18:56:32,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 19 states have internal predecessors, (73), 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) [2022-07-12 18:56:32,913 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 196 transitions. [2022-07-12 18:56:32,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-12 18:56:32,914 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:56:32,914 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 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, 1, 1, 1] [2022-07-12 18:56:32,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-07-12 18:56:33,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:56:33,126 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:56:33,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:56:33,128 INFO L85 PathProgramCache]: Analyzing trace with hash -593977757, now seen corresponding path program 1 times [2022-07-12 18:56:33,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:56:33,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [237469611] [2022-07-12 18:56:33,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:56:33,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:56:33,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:56:33,130 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) [2022-07-12 18:56:33,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-07-12 18:56:33,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:56:33,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 18:56:33,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:56:33,578 INFO L390 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 [2022-07-12 18:56:33,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:33,722 INFO L390 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 [2022-07-12 18:56:33,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:33,931 INFO L390 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 [2022-07-12 18:56:34,003 INFO L390 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 [2022-07-12 18:56:34,032 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-12 18:56:34,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:56:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-07-12 18:56:34,419 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:56:34,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [237469611] [2022-07-12 18:56:34,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [237469611] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:56:34,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:56:34,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 22 [2022-07-12 18:56:34,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217529980] [2022-07-12 18:56:34,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:56:34,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 18:56:34,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:56:34,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 18:56:34,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2022-07-12 18:56:34,421 INFO L87 Difference]: Start difference. First operand 172 states and 196 transitions. Second operand has 23 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 20 states have internal predecessors, (76), 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) [2022-07-12 18:56:38,464 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 [] [2022-07-12 18:56:40,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:56:40,143 INFO L93 Difference]: Finished difference Result 208 states and 227 transitions. [2022-07-12 18:56:40,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-12 18:56:40,145 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 20 states have internal predecessors, (76), 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 81 [2022-07-12 18:56:40,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:56:40,146 INFO L225 Difference]: With dead ends: 208 [2022-07-12 18:56:40,146 INFO L226 Difference]: Without dead ends: 208 [2022-07-12 18:56:40,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 143 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=382, Invalid=2698, Unknown=0, NotChecked=0, Total=3080 [2022-07-12 18:56:40,148 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 273 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 96 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:56:40,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 502 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 698 Invalid, 1 Unknown, 76 Unchecked, 3.5s Time] [2022-07-12 18:56:40,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-07-12 18:56:40,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 173. [2022-07-12 18:56:40,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 151 states have (on average 1.1589403973509933) internal successors, (175), 157 states have internal predecessors, (175), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2022-07-12 18:56:40,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 196 transitions. [2022-07-12 18:56:40,153 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 196 transitions. Word has length 81 [2022-07-12 18:56:40,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:56:40,154 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 196 transitions. [2022-07-12 18:56:40,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 20 states have internal predecessors, (76), 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) [2022-07-12 18:56:40,154 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 196 transitions. [2022-07-12 18:56:40,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-12 18:56:40,155 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:56:40,155 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 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, 1, 1, 1] [2022-07-12 18:56:40,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-07-12 18:56:40,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:56:40,372 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:56:40,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:56:40,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1233441180, now seen corresponding path program 1 times [2022-07-12 18:56:40,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:56:40,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832395552] [2022-07-12 18:56:40,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:56:40,373 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:56:40,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:56:40,374 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:56:40,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-07-12 18:56:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:56:40,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-12 18:56:40,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:56:40,799 INFO L390 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 [2022-07-12 18:56:40,865 INFO L390 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 [2022-07-12 18:56:40,941 INFO L390 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 3 [2022-07-12 18:56:41,015 INFO L356 Elim1Store]: treesize reduction 42, result has 42.5 percent of original size [2022-07-12 18:56:41,015 INFO L390 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 27 treesize of output 43 [2022-07-12 18:56:41,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:41,134 INFO L390 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 46 treesize of output 36 [2022-07-12 18:56:41,321 INFO L390 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 12 treesize of output 6 [2022-07-12 18:56:41,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:41,722 INFO L390 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 27 treesize of output 29 [2022-07-12 18:56:41,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:41,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:56:41,740 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:56:41,740 INFO L390 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 1 case distinctions, treesize of input 42 treesize of output 40 [2022-07-12 18:56:41,872 INFO L390 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 [2022-07-12 18:56:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 10 proven. 59 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-07-12 18:56:41,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:56:42,476 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:56:42,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832395552] [2022-07-12 18:56:42,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832395552] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:56:42,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1132550074] [2022-07-12 18:56:42,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:56:42,477 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:56:42,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:56:42,478 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:56:42,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-07-12 18:56:44,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:56:44,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-12 18:56:44,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:56:44,441 INFO L390 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 [2022-07-12 18:56:44,465 INFO L390 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 [2022-07-12 18:56:44,491 INFO L390 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 3 [2022-07-12 18:56:44,546 INFO L356 Elim1Store]: treesize reduction 42, result has 42.5 percent of original size [2022-07-12 18:56:44,546 INFO L390 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 27 treesize of output 43 [2022-07-12 18:56:44,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:44,611 INFO L390 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 46 treesize of output 36 [2022-07-12 18:56:44,641 INFO L390 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 12 treesize of output 6 [2022-07-12 18:56:44,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:44,800 INFO L390 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 27 treesize of output 29 [2022-07-12 18:56:44,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:44,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:56:44,838 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:56:44,839 INFO L390 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 1 case distinctions, treesize of input 42 treesize of output 40 [2022-07-12 18:56:44,891 INFO L390 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 [2022-07-12 18:56:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 10 proven. 59 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-07-12 18:56:44,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:56:45,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1132550074] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:56:45,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:56:45,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2022-07-12 18:56:45,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724640148] [2022-07-12 18:56:45,150 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:56:45,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 18:56:45,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:56:45,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 18:56:45,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2022-07-12 18:56:45,151 INFO L87 Difference]: Start difference. First operand 173 states and 196 transitions. Second operand has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 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) [2022-07-12 18:56:46,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:56:46,116 INFO L93 Difference]: Finished difference Result 173 states and 195 transitions. [2022-07-12 18:56:46,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 18:56:46,117 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 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 82 [2022-07-12 18:56:46,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:56:46,118 INFO L225 Difference]: With dead ends: 173 [2022-07-12 18:56:46,118 INFO L226 Difference]: Without dead ends: 173 [2022-07-12 18:56:46,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 158 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 18:56:46,119 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 27 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 18:56:46,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 436 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 611 Invalid, 0 Unknown, 93 Unchecked, 0.7s Time] [2022-07-12 18:56:46,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-07-12 18:56:46,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-07-12 18:56:46,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 151 states have (on average 1.1523178807947019) internal successors, (174), 157 states have internal predecessors, (174), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2022-07-12 18:56:46,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 195 transitions. [2022-07-12 18:56:46,123 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 195 transitions. Word has length 82 [2022-07-12 18:56:46,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:56:46,124 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 195 transitions. [2022-07-12 18:56:46,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 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) [2022-07-12 18:56:46,124 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 195 transitions. [2022-07-12 18:56:46,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-12 18:56:46,125 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:56:46,125 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:56:46,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-07-12 18:56:46,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-07-12 18:56:46,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:56:46,540 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:56:46,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:56:46,541 INFO L85 PathProgramCache]: Analyzing trace with hash 418029190, now seen corresponding path program 1 times [2022-07-12 18:56:46,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:56:46,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586066747] [2022-07-12 18:56:46,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:56:46,542 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:56:46,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:56:46,543 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:56:46,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-07-12 18:56:46,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:56:46,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-12 18:56:46,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:56:46,884 INFO L390 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 [2022-07-12 18:56:47,081 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:56:47,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:56:47,130 INFO L390 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 [2022-07-12 18:56:49,192 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_57| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_57|) (_ bv0 32)) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_57|))) is different from true [2022-07-12 18:56:49,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:49,240 INFO L390 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 24 treesize of output 23 [2022-07-12 18:56:51,281 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_58| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_58|) (_ bv0 32)) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_58|))) is different from true [2022-07-12 18:56:51,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:51,386 INFO L390 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 24 treesize of output 23 [2022-07-12 18:56:51,426 INFO L390 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 [2022-07-12 18:56:51,461 INFO L390 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 [2022-07-12 18:56:51,481 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 145 trivial. 16 not checked. [2022-07-12 18:56:51,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:56:51,536 INFO L390 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 6 treesize of output 4 [2022-07-12 18:56:52,339 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-12 18:56:52,339 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:56:52,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586066747] [2022-07-12 18:56:52,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586066747] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:56:52,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:56:52,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 29 [2022-07-12 18:56:52,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711107708] [2022-07-12 18:56:52,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:56:52,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 18:56:52,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:56:52,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 18:56:52,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=692, Unknown=2, NotChecked=106, Total=870 [2022-07-12 18:56:52,341 INFO L87 Difference]: Start difference. First operand 173 states and 195 transitions. Second operand has 30 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 26 states have internal predecessors, (85), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-12 18:57:08,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:08,176 INFO L93 Difference]: Finished difference Result 192 states and 210 transitions. [2022-07-12 18:57:08,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-12 18:57:08,177 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 26 states have internal predecessors, (85), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 83 [2022-07-12 18:57:08,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:08,178 INFO L225 Difference]: With dead ends: 192 [2022-07-12 18:57:08,178 INFO L226 Difference]: Without dead ends: 192 [2022-07-12 18:57:08,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 8 SemanticMatches, 56 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=291, Invalid=2793, Unknown=4, NotChecked=218, Total=3306 [2022-07-12 18:57:08,180 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 123 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:57:08,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 694 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1053 Invalid, 0 Unknown, 264 Unchecked, 2.2s Time] [2022-07-12 18:57:08,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-07-12 18:57:08,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 175. [2022-07-12 18:57:08,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 153 states have (on average 1.1503267973856208) internal successors, (176), 159 states have internal predecessors, (176), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2022-07-12 18:57:08,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 197 transitions. [2022-07-12 18:57:08,184 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 197 transitions. Word has length 83 [2022-07-12 18:57:08,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:08,185 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 197 transitions. [2022-07-12 18:57:08,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 26 states have internal predecessors, (85), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-12 18:57:08,185 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 197 transitions. [2022-07-12 18:57:08,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-12 18:57:08,186 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:08,186 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:57:08,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:08,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:08,391 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:57:08,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:08,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1306673498, now seen corresponding path program 2 times [2022-07-12 18:57:08,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:08,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894839612] [2022-07-12 18:57:08,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:57:08,393 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:08,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:08,394 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:57:08,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-07-12 18:57:08,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:57:08,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:57:08,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 18:57:08,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:08,716 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-07-12 18:57:08,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:57:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-07-12 18:57:08,880 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:08,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894839612] [2022-07-12 18:57:08,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894839612] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:57:08,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:57:08,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-12 18:57:08,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464907145] [2022-07-12 18:57:08,881 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:57:08,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:57:08,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:08,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:57:08,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:57:08,882 INFO L87 Difference]: Start difference. First operand 175 states and 197 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 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) [2022-07-12 18:57:09,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:09,106 INFO L93 Difference]: Finished difference Result 182 states and 196 transitions. [2022-07-12 18:57:09,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:57:09,108 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 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 87 [2022-07-12 18:57:09,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:09,108 INFO L225 Difference]: With dead ends: 182 [2022-07-12 18:57:09,109 INFO L226 Difference]: Without dead ends: 182 [2022-07-12 18:57:09,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:57:09,109 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 89 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:57:09,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 416 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:57:09,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-07-12 18:57:09,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 167. [2022-07-12 18:57:09,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 145 states have (on average 1.1172413793103448) internal successors, (162), 151 states have internal predecessors, (162), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2022-07-12 18:57:09,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 183 transitions. [2022-07-12 18:57:09,113 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 183 transitions. Word has length 87 [2022-07-12 18:57:09,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:09,114 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 183 transitions. [2022-07-12 18:57:09,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 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) [2022-07-12 18:57:09,114 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 183 transitions. [2022-07-12 18:57:09,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-12 18:57:09,114 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:09,115 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:57:09,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:09,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:09,327 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:57:09,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:09,327 INFO L85 PathProgramCache]: Analyzing trace with hash -891953512, now seen corresponding path program 1 times [2022-07-12 18:57:09,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:09,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046169450] [2022-07-12 18:57:09,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:09,328 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:09,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:09,329 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) [2022-07-12 18:57:09,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-07-12 18:57:09,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:09,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:57:09,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:09,763 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-07-12 18:57:09,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:57:10,083 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-07-12 18:57:10,083 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:10,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2046169450] [2022-07-12 18:57:10,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2046169450] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:57:10,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:57:10,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-12 18:57:10,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852136054] [2022-07-12 18:57:10,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:57:10,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:57:10,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:10,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:57:10,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:57:10,085 INFO L87 Difference]: Start difference. First operand 167 states and 183 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 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) [2022-07-12 18:57:10,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:10,712 INFO L93 Difference]: Finished difference Result 414 states and 445 transitions. [2022-07-12 18:57:10,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:57:10,713 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 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 89 [2022-07-12 18:57:10,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:10,714 INFO L225 Difference]: With dead ends: 414 [2022-07-12 18:57:10,714 INFO L226 Difference]: Without dead ends: 414 [2022-07-12 18:57:10,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2022-07-12 18:57:10,715 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 826 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:57:10,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [826 Valid, 578 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:57:10,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-07-12 18:57:10,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 190. [2022-07-12 18:57:10,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 165 states have (on average 1.1151515151515152) internal successors, (184), 170 states have internal predecessors, (184), 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) [2022-07-12 18:57:10,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 214 transitions. [2022-07-12 18:57:10,720 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 214 transitions. Word has length 89 [2022-07-12 18:57:10,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:10,721 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 214 transitions. [2022-07-12 18:57:10,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 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) [2022-07-12 18:57:10,721 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 214 transitions. [2022-07-12 18:57:10,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-12 18:57:10,722 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:10,722 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:57:10,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:10,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:10,934 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:57:10,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:10,934 INFO L85 PathProgramCache]: Analyzing trace with hash -586455192, now seen corresponding path program 4 times [2022-07-12 18:57:10,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:10,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894011429] [2022-07-12 18:57:10,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:57:10,935 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:10,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:10,936 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:57:10,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-07-12 18:57:11,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:57:11,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:57:11,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-12 18:57:11,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:11,311 INFO L390 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 [2022-07-12 18:57:11,318 INFO L390 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 [2022-07-12 18:57:13,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:13,642 INFO L390 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 [2022-07-12 18:57:13,649 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:57:13,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:57:15,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:15,777 INFO L390 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 [2022-07-12 18:57:15,786 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:57:15,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:57:15,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:15,923 INFO L390 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 [2022-07-12 18:57:15,932 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:57:15,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:57:16,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:16,080 INFO L390 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 [2022-07-12 18:57:16,089 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:57:16,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:57:16,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:16,222 INFO L390 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 [2022-07-12 18:57:16,229 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:57:16,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:57:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 5 proven. 71 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-07-12 18:57:16,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:57:18,805 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:18,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894011429] [2022-07-12 18:57:18,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894011429] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:57:18,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2117473592] [2022-07-12 18:57:18,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:57:18,806 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:57:18,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:57:18,807 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:57:18,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-07-12 18:57:19,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:57:19,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:57:19,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-12 18:57:19,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:19,440 INFO L390 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 [2022-07-12 18:57:19,445 INFO L390 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 [2022-07-12 18:57:19,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:19,669 INFO L390 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 [2022-07-12 18:57:19,676 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:57:19,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:57:19,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:19,780 INFO L390 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 [2022-07-12 18:57:19,789 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:57:19,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:57:21,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:21,875 INFO L390 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 [2022-07-12 18:57:21,882 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:57:21,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:57:21,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:21,988 INFO L390 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 [2022-07-12 18:57:21,997 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:57:21,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:57:22,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:22,115 INFO L390 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 [2022-07-12 18:57:22,124 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:57:22,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:57:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 5 proven. 71 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-07-12 18:57:22,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:57:24,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2117473592] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:57:24,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:57:24,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2022-07-12 18:57:24,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783317115] [2022-07-12 18:57:24,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:57:24,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 18:57:24,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:24,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 18:57:24,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=360, Unknown=1, NotChecked=0, Total=420 [2022-07-12 18:57:24,506 INFO L87 Difference]: Start difference. First operand 190 states and 214 transitions. Second operand has 19 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 18 states have internal predecessors, (39), 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) [2022-07-12 18:57:25,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:25,305 INFO L93 Difference]: Finished difference Result 270 states and 296 transitions. [2022-07-12 18:57:25,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 18:57:25,305 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 18 states have internal predecessors, (39), 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 90 [2022-07-12 18:57:25,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:25,306 INFO L225 Difference]: With dead ends: 270 [2022-07-12 18:57:25,306 INFO L226 Difference]: Without dead ends: 270 [2022-07-12 18:57:25,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 156 SyntacticMatches, 11 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=75, Invalid=476, Unknown=1, NotChecked=0, Total=552 [2022-07-12 18:57:25,307 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 102 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 18:57:25,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 906 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 764 Invalid, 0 Unknown, 61 Unchecked, 0.7s Time] [2022-07-12 18:57:25,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-07-12 18:57:25,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 190. [2022-07-12 18:57:25,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 165 states have (on average 1.1090909090909091) internal successors, (183), 170 states have internal predecessors, (183), 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) [2022-07-12 18:57:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 213 transitions. [2022-07-12 18:57:25,311 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 213 transitions. Word has length 90 [2022-07-12 18:57:25,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:25,312 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 213 transitions. [2022-07-12 18:57:25,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 18 states have internal predecessors, (39), 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) [2022-07-12 18:57:25,312 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 213 transitions. [2022-07-12 18:57:25,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-12 18:57:25,313 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:25,313 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 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, 1, 1, 1] [2022-07-12 18:57:25,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:25,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-07-12 18:57:25,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:25,721 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:57:25,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:25,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1366153752, now seen corresponding path program 2 times [2022-07-12 18:57:25,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:25,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [451707674] [2022-07-12 18:57:25,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:57:25,722 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:25,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:25,723 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) [2022-07-12 18:57:25,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-07-12 18:57:26,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:57:26,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:57:26,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-12 18:57:26,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:26,192 INFO L390 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 [2022-07-12 18:57:26,254 INFO L390 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 [2022-07-12 18:57:26,322 INFO L390 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 3 [2022-07-12 18:57:26,386 INFO L356 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2022-07-12 18:57:26,386 INFO L390 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 37 [2022-07-12 18:57:26,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:26,474 INFO L390 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 39 treesize of output 32 [2022-07-12 18:57:26,586 INFO L390 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 11 treesize of output 5 [2022-07-12 18:57:26,852 INFO L390 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 28 treesize of output 30 [2022-07-12 18:57:26,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:26,906 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:57:26,906 INFO L390 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 1 case distinctions, treesize of input 47 treesize of output 32 [2022-07-12 18:57:27,037 INFO L390 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 11 [2022-07-12 18:57:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 102 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-07-12 18:57:27,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:57:27,710 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:27,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [451707674] [2022-07-12 18:57:27,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [451707674] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:57:27,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1666427748] [2022-07-12 18:57:27,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:57:27,710 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:57:27,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:57:27,711 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:57:27,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-07-12 18:57:28,146 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:57:28,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552093090] [2022-07-12 18:57:28,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:57:28,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:57:28,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:57:28,148 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:57:28,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-12 18:57:28,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 1 [2022-07-12 18:57:28,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:57:28,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:57:28,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-12 18:57:28,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:28,948 INFO L390 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 [2022-07-12 18:57:29,086 INFO L390 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 [2022-07-12 18:57:29,250 INFO L390 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 3 [2022-07-12 18:57:29,314 INFO L356 Elim1Store]: treesize reduction 42, result has 42.5 percent of original size [2022-07-12 18:57:29,314 INFO L390 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 27 treesize of output 43 [2022-07-12 18:57:29,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:29,678 INFO L390 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 45 treesize of output 35 [2022-07-12 18:57:29,932 INFO L390 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 11 treesize of output 5 [2022-07-12 18:57:30,105 INFO L390 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 28 treesize of output 30 [2022-07-12 18:57:30,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:30,128 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:57:30,128 INFO L390 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 1 case distinctions, treesize of input 47 treesize of output 32 [2022-07-12 18:57:30,171 INFO L390 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 11 [2022-07-12 18:57:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-12 18:57:30,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:57:30,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552093090] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:57:30,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:57:30,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 38 [2022-07-12 18:57:30,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662094120] [2022-07-12 18:57:30,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:57:30,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-12 18:57:30,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:30,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-12 18:57:30,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2272, Unknown=0, NotChecked=0, Total=2450 [2022-07-12 18:57:30,992 INFO L87 Difference]: Start difference. First operand 190 states and 213 transitions. Second operand has 39 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 33 states have internal predecessors, (83), 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) [2022-07-12 18:57:32,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:32,672 INFO L93 Difference]: Finished difference Result 209 states and 232 transitions. [2022-07-12 18:57:32,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-12 18:57:32,677 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 33 states have internal predecessors, (83), 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 92 [2022-07-12 18:57:32,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:32,678 INFO L225 Difference]: With dead ends: 209 [2022-07-12 18:57:32,678 INFO L226 Difference]: Without dead ends: 209 [2022-07-12 18:57:32,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 159 SyntacticMatches, 9 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=282, Invalid=3624, Unknown=0, NotChecked=0, Total=3906 [2022-07-12 18:57:32,679 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 55 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:57:32,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 771 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1070 Invalid, 0 Unknown, 156 Unchecked, 1.1s Time] [2022-07-12 18:57:32,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-07-12 18:57:32,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-07-12 18:57:32,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 183 states have (on average 1.1038251366120218) internal successors, (202), 187 states have internal predecessors, (202), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (19), 15 states have call predecessors, (19), 11 states have call successors, (19) [2022-07-12 18:57:32,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 232 transitions. [2022-07-12 18:57:32,683 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 232 transitions. Word has length 92 [2022-07-12 18:57:32,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:32,684 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 232 transitions. [2022-07-12 18:57:32,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 33 states have internal predecessors, (83), 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) [2022-07-12 18:57:32,684 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 232 transitions. [2022-07-12 18:57:32,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-12 18:57:32,685 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:32,685 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:57:32,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:32,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:33,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:33,108 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:57:33,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:33,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1739385347, now seen corresponding path program 2 times [2022-07-12 18:57:33,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:33,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428183065] [2022-07-12 18:57:33,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:57:33,109 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:33,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:33,110 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:57:33,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-07-12 18:57:33,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:57:33,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:57:33,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-12 18:57:33,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:33,949 INFO L390 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 [2022-07-12 18:57:34,127 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-12 18:57:34,127 INFO L390 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 25 treesize of output 17 [2022-07-12 18:57:44,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:44,556 INFO L390 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 77 treesize of output 58 [2022-07-12 18:57:44,793 INFO L356 Elim1Store]: treesize reduction 39, result has 13.3 percent of original size [2022-07-12 18:57:44,793 INFO L390 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 111 treesize of output 101 [2022-07-12 18:57:53,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:53,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:57:53,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:57:53,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 53 [2022-07-12 18:57:53,786 INFO L390 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 54 treesize of output 38 [2022-07-12 18:58:00,659 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 12 proven. 61 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-07-12 18:58:00,659 INFO L328 TraceCheckSpWp]: Computing backward predicates...