./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8374eced2cbda6aab489eb004cb8e41f23aad88b98cd5c6913f13583171f2c3f --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 13:02:05,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 13:02:05,311 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 13:02:05,333 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 13:02:05,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 13:02:05,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 13:02:05,335 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 13:02:05,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 13:02:05,337 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 13:02:05,338 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 13:02:05,338 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 13:02:05,339 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 13:02:05,339 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 13:02:05,340 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 13:02:05,341 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 13:02:05,342 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 13:02:05,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 13:02:05,343 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 13:02:05,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 13:02:05,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 13:02:05,346 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 13:02:05,346 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 13:02:05,347 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 13:02:05,351 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 13:02:05,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 13:02:05,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 13:02:05,353 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 13:02:05,353 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 13:02:05,354 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 13:02:05,354 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 13:02:05,355 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 13:02:05,355 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 13:02:05,356 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 13:02:05,356 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 13:02:05,357 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 13:02:05,357 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 13:02:05,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 13:02:05,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 13:02:05,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 13:02:05,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 13:02:05,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 13:02:05,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 13:02:05,360 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 13:02:05,373 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 13:02:05,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 13:02:05,376 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 13:02:05,377 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 13:02:05,377 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 13:02:05,377 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 13:02:05,378 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 13:02:05,378 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 13:02:05,378 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 13:02:05,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 13:02:05,379 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 13:02:05,379 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 13:02:05,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 13:02:05,379 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 13:02:05,379 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 13:02:05,380 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 13:02:05,380 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 13:02:05,380 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 13:02:05,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 13:02:05,380 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 13:02:05,380 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 13:02:05,380 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 13:02:05,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 13:02:05,381 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 13:02:05,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 13:02:05,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 13:02:05,381 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 13:02:05,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 13:02:05,382 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 13:02:05,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 13:02:05,382 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8374eced2cbda6aab489eb004cb8e41f23aad88b98cd5c6913f13583171f2c3f [2022-07-14 13:02:05,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 13:02:05,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 13:02:05,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 13:02:05,583 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 13:02:05,583 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 13:02:05,585 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i [2022-07-14 13:02:05,646 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9fa68ec4/cd7ae245f62f4bffaa3ea5267a3eb594/FLAG4890d48aa [2022-07-14 13:02:06,098 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 13:02:06,099 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i [2022-07-14 13:02:06,122 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9fa68ec4/cd7ae245f62f4bffaa3ea5267a3eb594/FLAG4890d48aa [2022-07-14 13:02:06,401 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9fa68ec4/cd7ae245f62f4bffaa3ea5267a3eb594 [2022-07-14 13:02:06,404 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 13:02:06,405 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 13:02:06,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 13:02:06,408 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 13:02:06,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 13:02:06,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 01:02:06" (1/1) ... [2022-07-14 13:02:06,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65b0d5d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:06, skipping insertion in model container [2022-07-14 13:02:06,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 01:02:06" (1/1) ... [2022-07-14 13:02:06,416 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 13:02:06,465 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 13:02:06,830 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[44118,44131] [2022-07-14 13:02:06,839 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[44660,44673] [2022-07-14 13:02:06,901 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[56247,56260] [2022-07-14 13:02:06,902 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[56368,56381] [2022-07-14 13:02:06,910 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 13:02:06,927 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) [2022-07-14 13:02:06,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5cf9cee6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:06, skipping insertion in model container [2022-07-14 13:02:06,927 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 13:02:06,928 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-14 13:02:06,929 INFO L158 Benchmark]: Toolchain (without parser) took 523.60ms. Allocated memory is still 125.8MB. Free memory was 91.7MB in the beginning and 89.0MB in the end (delta: 2.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-14 13:02:06,929 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 92.3MB. Free memory was 47.7MB in the beginning and 47.6MB in the end (delta: 45.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 13:02:06,930 INFO L158 Benchmark]: CACSL2BoogieTranslator took 519.43ms. Allocated memory is still 125.8MB. Free memory was 91.4MB in the beginning and 89.0MB in the end (delta: 2.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-14 13:02:06,931 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 92.3MB. Free memory was 47.7MB in the beginning and 47.6MB in the end (delta: 45.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 519.43ms. Allocated memory is still 125.8MB. Free memory was 91.4MB in the beginning and 89.0MB in the end (delta: 2.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 990]: 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/uthash-2.0.2/uthash_FNV_test6-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8374eced2cbda6aab489eb004cb8e41f23aad88b98cd5c6913f13583171f2c3f --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 13:02:08,570 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 13:02:08,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 13:02:08,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 13:02:08,613 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 13:02:08,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 13:02:08,618 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 13:02:08,621 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 13:02:08,623 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 13:02:08,627 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 13:02:08,628 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 13:02:08,631 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 13:02:08,631 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 13:02:08,633 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 13:02:08,634 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 13:02:08,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 13:02:08,636 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 13:02:08,637 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 13:02:08,638 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 13:02:08,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 13:02:08,644 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 13:02:08,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 13:02:08,646 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 13:02:08,646 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 13:02:08,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 13:02:08,656 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 13:02:08,656 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 13:02:08,657 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 13:02:08,658 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 13:02:08,658 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 13:02:08,659 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 13:02:08,659 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 13:02:08,660 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 13:02:08,661 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 13:02:08,662 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 13:02:08,662 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 13:02:08,662 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 13:02:08,663 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 13:02:08,663 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 13:02:08,663 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 13:02:08,664 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 13:02:08,665 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 13:02:08,671 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-14 13:02:08,700 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 13:02:08,701 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 13:02:08,701 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 13:02:08,701 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 13:02:08,702 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 13:02:08,702 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 13:02:08,703 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 13:02:08,703 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 13:02:08,703 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 13:02:08,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 13:02:08,704 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 13:02:08,704 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 13:02:08,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 13:02:08,705 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 13:02:08,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 13:02:08,705 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 13:02:08,705 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 13:02:08,705 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 13:02:08,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 13:02:08,706 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 13:02:08,706 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-14 13:02:08,706 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-14 13:02:08,706 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 13:02:08,706 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 13:02:08,707 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 13:02:08,707 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 13:02:08,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 13:02:08,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 13:02:08,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 13:02:08,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 13:02:08,708 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-14 13:02:08,708 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-14 13:02:08,708 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-14 13:02:08,708 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8374eced2cbda6aab489eb004cb8e41f23aad88b98cd5c6913f13583171f2c3f [2022-07-14 13:02:08,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 13:02:08,983 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 13:02:08,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 13:02:08,986 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 13:02:08,987 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 13:02:08,988 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i [2022-07-14 13:02:09,032 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8085866b/fdd91293d1cd40b98fe21864f98904b8/FLAG3bce1e4da [2022-07-14 13:02:09,432 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 13:02:09,433 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i [2022-07-14 13:02:09,448 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8085866b/fdd91293d1cd40b98fe21864f98904b8/FLAG3bce1e4da [2022-07-14 13:02:09,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8085866b/fdd91293d1cd40b98fe21864f98904b8 [2022-07-14 13:02:09,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 13:02:09,789 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 13:02:09,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 13:02:09,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 13:02:09,796 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 13:02:09,797 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 01:02:09" (1/1) ... [2022-07-14 13:02:09,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5291ce45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:09, skipping insertion in model container [2022-07-14 13:02:09,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 01:02:09" (1/1) ... [2022-07-14 13:02:09,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 13:02:09,854 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 13:02:10,214 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[44118,44131] [2022-07-14 13:02:10,221 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[44660,44673] [2022-07-14 13:02:10,305 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[56247,56260] [2022-07-14 13:02:10,306 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[56368,56381] [2022-07-14 13:02:10,309 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 13:02:10,317 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-14 13:02:10,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 13:02:10,343 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[44118,44131] [2022-07-14 13:02:10,346 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[44660,44673] [2022-07-14 13:02:10,398 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[56247,56260] [2022-07-14 13:02:10,399 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[56368,56381] [2022-07-14 13:02:10,401 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 13:02:10,404 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 13:02:10,420 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[44118,44131] [2022-07-14 13:02:10,422 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[44660,44673] [2022-07-14 13:02:10,453 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[56247,56260] [2022-07-14 13:02:10,454 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[56368,56381] [2022-07-14 13:02:10,456 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 13:02:10,517 INFO L208 MainTranslator]: Completed translation [2022-07-14 13:02:10,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:10 WrapperNode [2022-07-14 13:02:10,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 13:02:10,519 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 13:02:10,519 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 13:02:10,519 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 13:02:10,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:10" (1/1) ... [2022-07-14 13:02:10,556 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:10" (1/1) ... [2022-07-14 13:02:10,598 INFO L137 Inliner]: procedures = 285, calls = 294, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 1042 [2022-07-14 13:02:10,603 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 13:02:10,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 13:02:10,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 13:02:10,604 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 13:02:10,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:10" (1/1) ... [2022-07-14 13:02:10,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:10" (1/1) ... [2022-07-14 13:02:10,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:10" (1/1) ... [2022-07-14 13:02:10,642 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:10" (1/1) ... [2022-07-14 13:02:10,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:10" (1/1) ... [2022-07-14 13:02:10,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:10" (1/1) ... [2022-07-14 13:02:10,699 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:10" (1/1) ... [2022-07-14 13:02:10,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 13:02:10,708 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 13:02:10,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 13:02:10,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 13:02:10,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:10" (1/1) ... [2022-07-14 13:02:10,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 13:02:10,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 13:02:10,732 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) [2022-07-14 13:02:10,742 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 [2022-07-14 13:02:10,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-14 13:02:10,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-14 13:02:10,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-14 13:02:10,763 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-07-14 13:02:10,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-14 13:02:10,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 13:02:10,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-14 13:02:10,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-14 13:02:10,764 INFO L130 BoogieDeclarations]: Found specification of procedure alt_bzero [2022-07-14 13:02:10,765 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_bzero [2022-07-14 13:02:10,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-14 13:02:10,765 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-14 13:02:10,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-14 13:02:10,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-14 13:02:10,765 INFO L130 BoogieDeclarations]: Found specification of procedure alt_malloc [2022-07-14 13:02:10,765 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_malloc [2022-07-14 13:02:10,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-14 13:02:10,766 INFO L130 BoogieDeclarations]: Found specification of procedure alt_free [2022-07-14 13:02:10,766 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_free [2022-07-14 13:02:10,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 13:02:10,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 13:02:11,023 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 13:02:11,025 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 13:02:13,919 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 13:02:13,931 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 13:02:13,938 INFO L299 CfgBuilder]: Removed 63 assume(true) statements. [2022-07-14 13:02:13,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 01:02:13 BoogieIcfgContainer [2022-07-14 13:02:13,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 13:02:13,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 13:02:13,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 13:02:13,945 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 13:02:13,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 01:02:09" (1/3) ... [2022-07-14 13:02:13,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@360d75cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 01:02:13, skipping insertion in model container [2022-07-14 13:02:13,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:10" (2/3) ... [2022-07-14 13:02:13,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@360d75cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 01:02:13, skipping insertion in model container [2022-07-14 13:02:13,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 01:02:13" (3/3) ... [2022-07-14 13:02:13,949 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test6-1.i [2022-07-14 13:02:13,959 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 13:02:13,960 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 531 error locations. [2022-07-14 13:02:13,993 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 13:02:13,997 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@36dbadb, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@575bc172 [2022-07-14 13:02:13,998 INFO L358 AbstractCegarLoop]: Starting to check reachability of 531 error locations. [2022-07-14 13:02:14,002 INFO L276 IsEmpty]: Start isEmpty. Operand has 1083 states, 534 states have (on average 2.2284644194756553) internal successors, (1190), 1065 states have internal predecessors, (1190), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-14 13:02:14,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-14 13:02:14,006 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:14,006 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-14 13:02:14,007 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-14 13:02:14,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:14,010 INFO L85 PathProgramCache]: Analyzing trace with hash 77521, now seen corresponding path program 1 times [2022-07-14 13:02:14,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:14,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087279457] [2022-07-14 13:02:14,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:14,018 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:14,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:14,020 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) [2022-07-14 13:02:14,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-14 13:02:14,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:14,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 13:02:14,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:14,197 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 [2022-07-14 13:02:14,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:14,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:14,207 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:14,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087279457] [2022-07-14 13:02:14,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087279457] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:14,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:14,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 13:02:14,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661486889] [2022-07-14 13:02:14,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:14,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 13:02:14,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:14,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 13:02:14,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 13:02:14,242 INFO L87 Difference]: Start difference. First operand has 1083 states, 534 states have (on average 2.2284644194756553) internal successors, (1190), 1065 states have internal predecessors, (1190), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:15,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:02:15,460 INFO L93 Difference]: Finished difference Result 1162 states and 1229 transitions. [2022-07-14 13:02:15,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 13:02:15,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-07-14 13:02:15,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:02:15,476 INFO L225 Difference]: With dead ends: 1162 [2022-07-14 13:02:15,476 INFO L226 Difference]: Without dead ends: 1160 [2022-07-14 13:02:15,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 13:02:15,479 INFO L413 NwaCegarLoop]: 798 mSDtfsCounter, 714 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:02:15,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [717 Valid, 1044 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-14 13:02:15,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2022-07-14 13:02:15,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 1103. [2022-07-14 13:02:15,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 568 states have (on average 2.084507042253521) internal successors, (1184), 1086 states have internal predecessors, (1184), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-14 13:02:15,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1210 transitions. [2022-07-14 13:02:15,572 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1210 transitions. Word has length 3 [2022-07-14 13:02:15,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:02:15,573 INFO L495 AbstractCegarLoop]: Abstraction has 1103 states and 1210 transitions. [2022-07-14 13:02:15,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:15,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1210 transitions. [2022-07-14 13:02:15,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-14 13:02:15,574 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:15,575 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-14 13:02:15,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-14 13:02:15,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:02:15,785 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-14 13:02:15,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:15,786 INFO L85 PathProgramCache]: Analyzing trace with hash 77522, now seen corresponding path program 1 times [2022-07-14 13:02:15,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:15,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548405654] [2022-07-14 13:02:15,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:15,787 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:15,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:15,790 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) [2022-07-14 13:02:15,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-14 13:02:15,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:15,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 13:02:15,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:15,925 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 [2022-07-14 13:02:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:15,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:15,938 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:15,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548405654] [2022-07-14 13:02:15,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548405654] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:15,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:15,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 13:02:15,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911700086] [2022-07-14 13:02:15,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:15,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 13:02:15,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:15,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 13:02:15,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 13:02:15,942 INFO L87 Difference]: Start difference. First operand 1103 states and 1210 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:17,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:02:17,907 INFO L93 Difference]: Finished difference Result 1497 states and 1638 transitions. [2022-07-14 13:02:17,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 13:02:17,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-07-14 13:02:17,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:02:17,919 INFO L225 Difference]: With dead ends: 1497 [2022-07-14 13:02:17,920 INFO L226 Difference]: Without dead ends: 1497 [2022-07-14 13:02:17,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 13:02:17,921 INFO L413 NwaCegarLoop]: 943 mSDtfsCounter, 418 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 1538 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-14 13:02:17,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 1538 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-14 13:02:17,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2022-07-14 13:02:17,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1307. [2022-07-14 13:02:17,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 771 states have (on average 2.0700389105058368) internal successors, (1596), 1288 states have internal predecessors, (1596), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-14 13:02:17,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 1626 transitions. [2022-07-14 13:02:17,951 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 1626 transitions. Word has length 3 [2022-07-14 13:02:17,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:02:17,952 INFO L495 AbstractCegarLoop]: Abstraction has 1307 states and 1626 transitions. [2022-07-14 13:02:17,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:17,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 1626 transitions. [2022-07-14 13:02:17,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-14 13:02:17,953 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:17,953 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:02:17,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-07-14 13:02:18,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:02:18,160 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-14 13:02:18,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:18,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1111693489, now seen corresponding path program 1 times [2022-07-14 13:02:18,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:18,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340721398] [2022-07-14 13:02:18,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:18,161 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:18,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:18,162 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) [2022-07-14 13:02:18,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-14 13:02:18,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:18,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 13:02:18,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:18,283 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 [2022-07-14 13:02:18,286 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 [2022-07-14 13:02:18,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 13:02:18,320 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 [2022-07-14 13:02:18,327 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 13:02:18,328 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 [2022-07-14 13:02:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:18,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:18,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:18,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340721398] [2022-07-14 13:02:18,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340721398] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:18,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:18,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 13:02:18,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909947437] [2022-07-14 13:02:18,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:18,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:02:18,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:18,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:02:18,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:02:18,346 INFO L87 Difference]: Start difference. First operand 1307 states and 1626 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:21,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:02:21,515 INFO L93 Difference]: Finished difference Result 1997 states and 2371 transitions. [2022-07-14 13:02:21,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 13:02:21,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-14 13:02:21,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:02:21,521 INFO L225 Difference]: With dead ends: 1997 [2022-07-14 13:02:21,521 INFO L226 Difference]: Without dead ends: 1997 [2022-07-14 13:02:21,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:02:21,522 INFO L413 NwaCegarLoop]: 655 mSDtfsCounter, 719 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 1797 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 1587 SdHoareTripleChecker+Invalid, 1812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:02:21,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [723 Valid, 1587 Invalid, 1812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1797 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-14 13:02:21,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2022-07-14 13:02:21,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1452. [2022-07-14 13:02:21,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 916 states have (on average 2.0513100436681224) internal successors, (1879), 1433 states have internal predecessors, (1879), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-14 13:02:21,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 1909 transitions. [2022-07-14 13:02:21,543 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 1909 transitions. Word has length 8 [2022-07-14 13:02:21,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:02:21,543 INFO L495 AbstractCegarLoop]: Abstraction has 1452 states and 1909 transitions. [2022-07-14 13:02:21,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:21,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 1909 transitions. [2022-07-14 13:02:21,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 13:02:21,544 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:21,544 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:02:21,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-07-14 13:02:21,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:02:21,751 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-14 13:02:21,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:21,752 INFO L85 PathProgramCache]: Analyzing trace with hash -102759776, now seen corresponding path program 1 times [2022-07-14 13:02:21,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:21,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456114354] [2022-07-14 13:02:21,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:21,753 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:21,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:21,754 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) [2022-07-14 13:02:21,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-14 13:02:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:21,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 13:02:21,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:21,858 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 [2022-07-14 13:02:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:21,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:21,870 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:21,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456114354] [2022-07-14 13:02:21,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456114354] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:21,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:21,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 13:02:21,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941006641] [2022-07-14 13:02:21,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:21,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:02:21,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:21,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:02:21,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:02:21,872 INFO L87 Difference]: Start difference. First operand 1452 states and 1909 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:23,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:02:23,935 INFO L93 Difference]: Finished difference Result 2430 states and 3107 transitions. [2022-07-14 13:02:23,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 13:02:23,936 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-14 13:02:23,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:02:23,942 INFO L225 Difference]: With dead ends: 2430 [2022-07-14 13:02:23,942 INFO L226 Difference]: Without dead ends: 2430 [2022-07-14 13:02:23,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 13:02:23,943 INFO L413 NwaCegarLoop]: 1014 mSDtfsCounter, 2141 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2147 SdHoareTripleChecker+Valid, 1973 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-14 13:02:23,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2147 Valid, 1973 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-14 13:02:23,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2430 states. [2022-07-14 13:02:23,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2430 to 1407. [2022-07-14 13:02:23,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1407 states, 916 states have (on average 1.9868995633187774) internal successors, (1820), 1388 states have internal predecessors, (1820), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-14 13:02:23,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 1850 transitions. [2022-07-14 13:02:23,968 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 1850 transitions. Word has length 9 [2022-07-14 13:02:23,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:02:23,968 INFO L495 AbstractCegarLoop]: Abstraction has 1407 states and 1850 transitions. [2022-07-14 13:02:23,968 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:23,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 1850 transitions. [2022-07-14 13:02:23,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 13:02:23,969 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:23,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:02:23,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-14 13:02:24,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:02:24,176 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-14 13:02:24,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:24,176 INFO L85 PathProgramCache]: Analyzing trace with hash -102759775, now seen corresponding path program 1 times [2022-07-14 13:02:24,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:24,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175630016] [2022-07-14 13:02:24,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:24,177 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:24,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:24,178 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) [2022-07-14 13:02:24,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-14 13:02:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:24,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 13:02:24,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:24,289 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 [2022-07-14 13:02:24,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:24,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:24,315 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:24,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175630016] [2022-07-14 13:02:24,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175630016] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:24,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:24,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 13:02:24,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393262684] [2022-07-14 13:02:24,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:24,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:02:24,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:24,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:02:24,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:02:24,317 INFO L87 Difference]: Start difference. First operand 1407 states and 1850 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:26,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:02:26,561 INFO L93 Difference]: Finished difference Result 2046 states and 2685 transitions. [2022-07-14 13:02:26,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 13:02:26,562 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-14 13:02:26,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:02:26,571 INFO L225 Difference]: With dead ends: 2046 [2022-07-14 13:02:26,571 INFO L226 Difference]: Without dead ends: 2046 [2022-07-14 13:02:26,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 13:02:26,573 INFO L413 NwaCegarLoop]: 1193 mSDtfsCounter, 1375 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1378 SdHoareTripleChecker+Valid, 2096 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-14 13:02:26,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1378 Valid, 2096 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-14 13:02:26,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2022-07-14 13:02:26,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1397. [2022-07-14 13:02:26,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 916 states have (on average 1.960698689956332) internal successors, (1796), 1378 states have internal predecessors, (1796), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-14 13:02:26,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 1826 transitions. [2022-07-14 13:02:26,598 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 1826 transitions. Word has length 9 [2022-07-14 13:02:26,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:02:26,598 INFO L495 AbstractCegarLoop]: Abstraction has 1397 states and 1826 transitions. [2022-07-14 13:02:26,598 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:26,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 1826 transitions. [2022-07-14 13:02:26,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-14 13:02:26,599 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:26,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:02:26,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-14 13:02:26,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:02:26,808 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr516ASSERT_VIOLATIONMEMORY_LEAK === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-14 13:02:26,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:26,809 INFO L85 PathProgramCache]: Analyzing trace with hash -856298529, now seen corresponding path program 1 times [2022-07-14 13:02:26,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:26,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159228983] [2022-07-14 13:02:26,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:26,809 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:26,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:26,810 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) [2022-07-14 13:02:26,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-14 13:02:26,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:26,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 13:02:26,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:26,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:26,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:26,967 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:26,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159228983] [2022-07-14 13:02:26,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159228983] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:26,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:26,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:02:26,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923472367] [2022-07-14 13:02:26,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:26,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:02:26,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:26,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:02:26,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:02:26,969 INFO L87 Difference]: Start difference. First operand 1397 states and 1826 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:27,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:02:27,465 INFO L93 Difference]: Finished difference Result 1873 states and 2393 transitions. [2022-07-14 13:02:27,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 13:02:27,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-14 13:02:27,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:02:27,470 INFO L225 Difference]: With dead ends: 1873 [2022-07-14 13:02:27,470 INFO L226 Difference]: Without dead ends: 1873 [2022-07-14 13:02:27,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 13:02:27,471 INFO L413 NwaCegarLoop]: 1156 mSDtfsCounter, 546 mSDsluCounter, 1966 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 3122 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 13:02:27,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [555 Valid, 3122 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 13:02:27,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2022-07-14 13:02:27,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1648. [2022-07-14 13:02:27,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1167 states have (on average 1.974293059125964) internal successors, (2304), 1629 states have internal predecessors, (2304), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-14 13:02:27,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 2334 transitions. [2022-07-14 13:02:27,499 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 2334 transitions. Word has length 11 [2022-07-14 13:02:27,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:02:27,499 INFO L495 AbstractCegarLoop]: Abstraction has 1648 states and 2334 transitions. [2022-07-14 13:02:27,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:27,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 2334 transitions. [2022-07-14 13:02:27,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-14 13:02:27,500 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:27,501 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:02:27,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-14 13:02:27,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:02:27,713 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-14 13:02:27,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:27,714 INFO L85 PathProgramCache]: Analyzing trace with hash 2117571646, now seen corresponding path program 1 times [2022-07-14 13:02:27,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:27,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1909155912] [2022-07-14 13:02:27,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:27,714 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:27,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:27,715 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) [2022-07-14 13:02:27,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-14 13:02:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:27,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 13:02:27,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:27,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 13:02:27,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 13:02:27,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 13:02:27,907 INFO L356 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2022-07-14 13:02:27,907 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 3 case distinctions, treesize of input 30 treesize of output 36 [2022-07-14 13:02:27,936 INFO L356 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-07-14 13:02:27,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2022-07-14 13:02:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:27,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:27,949 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:27,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1909155912] [2022-07-14 13:02:27,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1909155912] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:27,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:27,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:02:27,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384498877] [2022-07-14 13:02:27,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:27,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:02:27,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:27,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:02:27,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:02:27,952 INFO L87 Difference]: Start difference. First operand 1648 states and 2334 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:28,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:02:28,909 INFO L93 Difference]: Finished difference Result 1654 states and 2037 transitions. [2022-07-14 13:02:28,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 13:02:28,910 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-14 13:02:28,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:02:28,914 INFO L225 Difference]: With dead ends: 1654 [2022-07-14 13:02:28,914 INFO L226 Difference]: Without dead ends: 1654 [2022-07-14 13:02:28,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 13:02:28,915 INFO L413 NwaCegarLoop]: 1040 mSDtfsCounter, 357 mSDsluCounter, 1937 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 2977 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-14 13:02:28,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 2977 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-14 13:02:28,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2022-07-14 13:02:28,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1290. [2022-07-14 13:02:28,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 811 states have (on average 1.9506781750924784) internal successors, (1582), 1273 states have internal predecessors, (1582), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-14 13:02:28,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 1608 transitions. [2022-07-14 13:02:28,939 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 1608 transitions. Word has length 14 [2022-07-14 13:02:28,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:02:28,939 INFO L495 AbstractCegarLoop]: Abstraction has 1290 states and 1608 transitions. [2022-07-14 13:02:28,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:28,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 1608 transitions. [2022-07-14 13:02:28,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-14 13:02:28,940 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:28,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:02:28,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-07-14 13:02:29,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:02:29,149 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-14 13:02:29,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:29,149 INFO L85 PathProgramCache]: Analyzing trace with hash 769788685, now seen corresponding path program 1 times [2022-07-14 13:02:29,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:29,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316151164] [2022-07-14 13:02:29,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:29,150 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:29,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:29,151 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) [2022-07-14 13:02:29,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-14 13:02:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:29,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-14 13:02:29,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:29,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:29,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:29,288 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:29,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316151164] [2022-07-14 13:02:29,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316151164] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:29,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:29,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 13:02:29,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884740994] [2022-07-14 13:02:29,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:29,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 13:02:29,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:29,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 13:02:29,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 13:02:29,289 INFO L87 Difference]: Start difference. First operand 1290 states and 1608 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:29,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:02:29,306 INFO L93 Difference]: Finished difference Result 1230 states and 1522 transitions. [2022-07-14 13:02:29,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 13:02:29,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-14 13:02:29,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:02:29,309 INFO L225 Difference]: With dead ends: 1230 [2022-07-14 13:02:29,309 INFO L226 Difference]: Without dead ends: 1230 [2022-07-14 13:02:29,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 13:02:29,310 INFO L413 NwaCegarLoop]: 1029 mSDtfsCounter, 959 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 13:02:29,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [971 Valid, 1096 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 13:02:29,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2022-07-14 13:02:29,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1230. [2022-07-14 13:02:29,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 775 states have (on average 1.9303225806451614) internal successors, (1496), 1213 states have internal predecessors, (1496), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-14 13:02:29,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 1522 transitions. [2022-07-14 13:02:29,327 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 1522 transitions. Word has length 19 [2022-07-14 13:02:29,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:02:29,327 INFO L495 AbstractCegarLoop]: Abstraction has 1230 states and 1522 transitions. [2022-07-14 13:02:29,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:29,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 1522 transitions. [2022-07-14 13:02:29,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-14 13:02:29,328 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:29,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:02:29,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-14 13:02:29,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:02:29,537 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-14 13:02:29,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:29,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1032548102, now seen corresponding path program 1 times [2022-07-14 13:02:29,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:29,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848753705] [2022-07-14 13:02:29,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:29,538 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:29,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:29,539 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) [2022-07-14 13:02:29,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-14 13:02:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:29,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 13:02:29,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:29,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:29,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:29,693 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:29,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [848753705] [2022-07-14 13:02:29,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [848753705] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:29,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:29,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:02:29,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465179356] [2022-07-14 13:02:29,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:29,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:02:29,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:29,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:02:29,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:02:29,695 INFO L87 Difference]: Start difference. First operand 1230 states and 1522 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:29,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:02:29,743 INFO L93 Difference]: Finished difference Result 1202 states and 1466 transitions. [2022-07-14 13:02:29,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 13:02:29,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-14 13:02:29,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:02:29,747 INFO L225 Difference]: With dead ends: 1202 [2022-07-14 13:02:29,747 INFO L226 Difference]: Without dead ends: 1202 [2022-07-14 13:02:29,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 13:02:29,750 INFO L413 NwaCegarLoop]: 984 mSDtfsCounter, 930 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 942 SdHoareTripleChecker+Valid, 2028 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 13:02:29,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [942 Valid, 2028 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 13:02:29,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2022-07-14 13:02:29,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1200. [2022-07-14 13:02:29,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 759 states have (on average 1.8945981554677207) internal successors, (1438), 1183 states have internal predecessors, (1438), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-14 13:02:29,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1464 transitions. [2022-07-14 13:02:29,768 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1464 transitions. Word has length 21 [2022-07-14 13:02:29,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:02:29,769 INFO L495 AbstractCegarLoop]: Abstraction has 1200 states and 1464 transitions. [2022-07-14 13:02:29,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:29,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1464 transitions. [2022-07-14 13:02:29,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-14 13:02:29,769 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:29,770 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:02:29,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-14 13:02:29,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:02:29,978 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-14 13:02:29,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:29,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1673308372, now seen corresponding path program 1 times [2022-07-14 13:02:29,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:29,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1408515700] [2022-07-14 13:02:29,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:29,979 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:29,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:29,980 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) [2022-07-14 13:02:29,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-14 13:02:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:30,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 13:02:30,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:30,124 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 [2022-07-14 13:02:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:30,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:30,167 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:30,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1408515700] [2022-07-14 13:02:30,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1408515700] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:30,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:30,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:02:30,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991407414] [2022-07-14 13:02:30,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:30,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 13:02:30,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:30,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 13:02:30,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 13:02:30,168 INFO L87 Difference]: Start difference. First operand 1200 states and 1464 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:32,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:02:32,346 INFO L93 Difference]: Finished difference Result 2184 states and 2665 transitions. [2022-07-14 13:02:32,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 13:02:32,347 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-14 13:02:32,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:02:32,352 INFO L225 Difference]: With dead ends: 2184 [2022-07-14 13:02:32,352 INFO L226 Difference]: Without dead ends: 2184 [2022-07-14 13:02:32,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-14 13:02:32,352 INFO L413 NwaCegarLoop]: 841 mSDtfsCounter, 2037 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 1841 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2040 SdHoareTripleChecker+Valid, 2019 SdHoareTripleChecker+Invalid, 1860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:02:32,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2040 Valid, 2019 Invalid, 1860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1841 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-14 13:02:32,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2022-07-14 13:02:32,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1196. [2022-07-14 13:02:32,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1196 states, 759 states have (on average 1.8840579710144927) internal successors, (1430), 1179 states have internal predecessors, (1430), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-14 13:02:32,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 1456 transitions. [2022-07-14 13:02:32,366 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 1456 transitions. Word has length 35 [2022-07-14 13:02:32,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:02:32,366 INFO L495 AbstractCegarLoop]: Abstraction has 1196 states and 1456 transitions. [2022-07-14 13:02:32,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:32,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 1456 transitions. [2022-07-14 13:02:32,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-14 13:02:32,367 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:32,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:02:32,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-14 13:02:32,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:02:32,575 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-14 13:02:32,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:32,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1673308373, now seen corresponding path program 1 times [2022-07-14 13:02:32,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:32,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059303740] [2022-07-14 13:02:32,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:32,576 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:32,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:32,577 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) [2022-07-14 13:02:32,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-14 13:02:32,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:32,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 13:02:32,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:32,734 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 [2022-07-14 13:02:32,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:32,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:32,855 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:32,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059303740] [2022-07-14 13:02:32,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1059303740] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:32,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:32,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:02:32,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471906162] [2022-07-14 13:02:32,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:32,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 13:02:32,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:32,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 13:02:32,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 13:02:32,857 INFO L87 Difference]: Start difference. First operand 1196 states and 1456 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:35,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:02:35,427 INFO L93 Difference]: Finished difference Result 1806 states and 2219 transitions. [2022-07-14 13:02:35,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 13:02:35,427 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-14 13:02:35,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:02:35,432 INFO L225 Difference]: With dead ends: 1806 [2022-07-14 13:02:35,432 INFO L226 Difference]: Without dead ends: 1806 [2022-07-14 13:02:35,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-14 13:02:35,432 INFO L413 NwaCegarLoop]: 1234 mSDtfsCounter, 1782 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1782 SdHoareTripleChecker+Valid, 2595 SdHoareTripleChecker+Invalid, 1632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-14 13:02:35,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1782 Valid, 2595 Invalid, 1632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1614 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-14 13:02:35,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2022-07-14 13:02:35,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1192. [2022-07-14 13:02:35,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 759 states have (on average 1.8735177865612649) internal successors, (1422), 1175 states have internal predecessors, (1422), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-14 13:02:35,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1448 transitions. [2022-07-14 13:02:35,444 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1448 transitions. Word has length 35 [2022-07-14 13:02:35,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:02:35,444 INFO L495 AbstractCegarLoop]: Abstraction has 1192 states and 1448 transitions. [2022-07-14 13:02:35,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:35,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1448 transitions. [2022-07-14 13:02:35,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-14 13:02:35,446 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:35,446 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:02:35,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-14 13:02:35,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:02:35,650 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-14 13:02:35,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:35,651 INFO L85 PathProgramCache]: Analyzing trace with hash -2063927218, now seen corresponding path program 1 times [2022-07-14 13:02:35,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:35,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1353893782] [2022-07-14 13:02:35,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:35,651 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:35,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:35,653 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) [2022-07-14 13:02:35,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-14 13:02:35,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:35,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 13:02:35,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:35,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:35,868 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:35,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1353893782] [2022-07-14 13:02:35,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1353893782] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:35,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:35,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:02:35,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436746846] [2022-07-14 13:02:35,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:35,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:02:35,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:35,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:02:35,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:02:35,869 INFO L87 Difference]: Start difference. First operand 1192 states and 1448 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:35,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:02:35,915 INFO L93 Difference]: Finished difference Result 1180 states and 1428 transitions. [2022-07-14 13:02:35,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 13:02:35,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-14 13:02:35,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:02:35,919 INFO L225 Difference]: With dead ends: 1180 [2022-07-14 13:02:35,919 INFO L226 Difference]: Without dead ends: 1180 [2022-07-14 13:02:35,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 13:02:35,920 INFO L413 NwaCegarLoop]: 978 mSDtfsCounter, 906 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 2006 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 13:02:35,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [918 Valid, 2006 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 13:02:35,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2022-07-14 13:02:35,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1180. [2022-07-14 13:02:35,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 747 states have (on average 1.8768406961178046) internal successors, (1402), 1163 states have internal predecessors, (1402), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-14 13:02:35,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1428 transitions. [2022-07-14 13:02:35,932 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1428 transitions. Word has length 54 [2022-07-14 13:02:35,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:02:35,932 INFO L495 AbstractCegarLoop]: Abstraction has 1180 states and 1428 transitions. [2022-07-14 13:02:35,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:35,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1428 transitions. [2022-07-14 13:02:35,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-14 13:02:35,935 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:35,935 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:02:35,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-14 13:02:36,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:02:36,145 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-14 13:02:36,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:36,146 INFO L85 PathProgramCache]: Analyzing trace with hash -203140862, now seen corresponding path program 1 times [2022-07-14 13:02:36,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:36,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470356551] [2022-07-14 13:02:36,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:36,147 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:36,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:36,148 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 13:02:36,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-14 13:02:36,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:36,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 13:02:36,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:36,474 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-14 13:02:36,475 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 21 [2022-07-14 13:02:36,527 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-14 13:02:36,527 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 18 treesize of output 27 [2022-07-14 13:02:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:37,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:37,078 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:37,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470356551] [2022-07-14 13:02:37,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470356551] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:37,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:37,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:02:37,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416992444] [2022-07-14 13:02:37,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:37,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 13:02:37,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:37,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 13:02:37,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-14 13:02:37,080 INFO L87 Difference]: Start difference. First operand 1180 states and 1428 transitions. Second operand has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:39,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:02:39,054 INFO L93 Difference]: Finished difference Result 2632 states and 3156 transitions. [2022-07-14 13:02:39,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 13:02:39,055 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-14 13:02:39,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:02:39,061 INFO L225 Difference]: With dead ends: 2632 [2022-07-14 13:02:39,062 INFO L226 Difference]: Without dead ends: 2632 [2022-07-14 13:02:39,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-14 13:02:39,062 INFO L413 NwaCegarLoop]: 878 mSDtfsCounter, 1419 mSDsluCounter, 2143 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1419 SdHoareTripleChecker+Valid, 3021 SdHoareTripleChecker+Invalid, 2340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1284 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-14 13:02:39,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1419 Valid, 3021 Invalid, 2340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1051 Invalid, 0 Unknown, 1284 Unchecked, 1.9s Time] [2022-07-14 13:02:39,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2022-07-14 13:02:39,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 1617. [2022-07-14 13:02:39,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1169 states have (on average 1.872540633019675) internal successors, (2189), 1588 states have internal predecessors, (2189), 25 states have call successors, (25), 8 states have call predecessors, (25), 7 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-14 13:02:39,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 2239 transitions. [2022-07-14 13:02:39,082 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 2239 transitions. Word has length 62 [2022-07-14 13:02:39,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:02:39,083 INFO L495 AbstractCegarLoop]: Abstraction has 1617 states and 2239 transitions. [2022-07-14 13:02:39,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:39,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 2239 transitions. [2022-07-14 13:02:39,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-14 13:02:39,083 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:39,083 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:02:39,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-14 13:02:39,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:02:39,294 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-14 13:02:39,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:39,295 INFO L85 PathProgramCache]: Analyzing trace with hash -203140861, now seen corresponding path program 1 times [2022-07-14 13:02:39,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:39,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [379235133] [2022-07-14 13:02:39,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:39,295 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:39,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:39,297 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) [2022-07-14 13:02:39,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-14 13:02:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:39,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-14 13:02:39,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:39,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 13:02:39,632 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 [2022-07-14 13:02:39,663 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 13:02:39,663 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 14 [2022-07-14 13:02:40,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:40,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:40,016 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:40,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [379235133] [2022-07-14 13:02:40,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [379235133] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:40,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:40,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:02:40,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359718366] [2022-07-14 13:02:40,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:40,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 13:02:40,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:40,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 13:02:40,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-14 13:02:40,018 INFO L87 Difference]: Start difference. First operand 1617 states and 2239 transitions. Second operand has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:42,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:02:42,195 INFO L93 Difference]: Finished difference Result 1623 states and 2246 transitions. [2022-07-14 13:02:42,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 13:02:42,196 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-14 13:02:42,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:02:42,200 INFO L225 Difference]: With dead ends: 1623 [2022-07-14 13:02:42,200 INFO L226 Difference]: Without dead ends: 1623 [2022-07-14 13:02:42,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-14 13:02:42,200 INFO L413 NwaCegarLoop]: 960 mSDtfsCounter, 111 mSDsluCounter, 1516 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:02:42,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 2476 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1445 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-14 13:02:42,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2022-07-14 13:02:42,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1622. [2022-07-14 13:02:42,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1173 states have (on average 1.8695652173913044) internal successors, (2193), 1592 states have internal predecessors, (2193), 26 states have call successors, (26), 9 states have call predecessors, (26), 7 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-14 13:02:42,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2245 transitions. [2022-07-14 13:02:42,220 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2245 transitions. Word has length 62 [2022-07-14 13:02:42,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:02:42,221 INFO L495 AbstractCegarLoop]: Abstraction has 1622 states and 2245 transitions. [2022-07-14 13:02:42,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:42,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2245 transitions. [2022-07-14 13:02:42,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-14 13:02:42,222 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:42,222 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:02:42,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-07-14 13:02:42,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:02:42,432 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-14 13:02:42,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:42,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1864793253, now seen corresponding path program 1 times [2022-07-14 13:02:42,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:42,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [70263803] [2022-07-14 13:02:42,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:42,434 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:42,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:42,435 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) [2022-07-14 13:02:42,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-14 13:02:42,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:42,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 13:02:42,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:42,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:42,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:42,678 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:42,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [70263803] [2022-07-14 13:02:42,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [70263803] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:42,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:42,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 13:02:42,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192108746] [2022-07-14 13:02:42,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:42,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 13:02:42,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:42,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 13:02:42,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 13:02:42,680 INFO L87 Difference]: Start difference. First operand 1622 states and 2245 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:42,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:02:42,755 INFO L93 Difference]: Finished difference Result 1648 states and 2272 transitions. [2022-07-14 13:02:42,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 13:02:42,756 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-14 13:02:42,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:02:42,764 INFO L225 Difference]: With dead ends: 1648 [2022-07-14 13:02:42,764 INFO L226 Difference]: Without dead ends: 1648 [2022-07-14 13:02:42,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-14 13:02:42,766 INFO L413 NwaCegarLoop]: 975 mSDtfsCounter, 19 mSDsluCounter, 3890 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 4865 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:02:42,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 4865 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 13:02:42,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2022-07-14 13:02:42,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1646. [2022-07-14 13:02:42,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1646 states, 1191 states have (on average 1.8606213266162888) internal successors, (2216), 1612 states have internal predecessors, (2216), 28 states have call successors, (28), 13 states have call predecessors, (28), 11 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2022-07-14 13:02:42,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2272 transitions. [2022-07-14 13:02:42,789 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2272 transitions. Word has length 68 [2022-07-14 13:02:42,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:02:42,789 INFO L495 AbstractCegarLoop]: Abstraction has 1646 states and 2272 transitions. [2022-07-14 13:02:42,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:42,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2272 transitions. [2022-07-14 13:02:42,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-14 13:02:42,790 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:42,790 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:02:42,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-07-14 13:02:43,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:02:43,000 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-14 13:02:43,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:43,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1913615011, now seen corresponding path program 1 times [2022-07-14 13:02:43,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:43,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1340683554] [2022-07-14 13:02:43,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:43,002 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:43,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:43,003 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) [2022-07-14 13:02:43,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-14 13:02:43,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:43,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 13:02:43,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:43,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:43,332 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:43,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1340683554] [2022-07-14 13:02:43,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1340683554] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:43,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:43,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 13:02:43,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131889937] [2022-07-14 13:02:43,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:43,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 13:02:43,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:43,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 13:02:43,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 13:02:43,335 INFO L87 Difference]: Start difference. First operand 1646 states and 2272 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 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) [2022-07-14 13:02:43,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:02:43,464 INFO L93 Difference]: Finished difference Result 1658 states and 2286 transitions. [2022-07-14 13:02:43,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 13:02:43,465 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 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 68 [2022-07-14 13:02:43,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:02:43,470 INFO L225 Difference]: With dead ends: 1658 [2022-07-14 13:02:43,471 INFO L226 Difference]: Without dead ends: 1658 [2022-07-14 13:02:43,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-14 13:02:43,471 INFO L413 NwaCegarLoop]: 975 mSDtfsCounter, 23 mSDsluCounter, 2824 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 3799 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:02:43,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 3799 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 13:02:43,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2022-07-14 13:02:43,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1649. [2022-07-14 13:02:43,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1193 states have (on average 1.859178541492037) internal successors, (2218), 1614 states have internal predecessors, (2218), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (29), 24 states have call predecessors, (29), 28 states have call successors, (29) [2022-07-14 13:02:43,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2275 transitions. [2022-07-14 13:02:43,498 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2275 transitions. Word has length 68 [2022-07-14 13:02:43,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:02:43,498 INFO L495 AbstractCegarLoop]: Abstraction has 1649 states and 2275 transitions. [2022-07-14 13:02:43,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 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) [2022-07-14 13:02:43,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2275 transitions. [2022-07-14 13:02:43,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-14 13:02:43,499 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:43,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:02:43,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-14 13:02:43,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:02:43,703 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-14 13:02:43,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:43,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1847999061, now seen corresponding path program 1 times [2022-07-14 13:02:43,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:43,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [836650264] [2022-07-14 13:02:43,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:43,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:43,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:43,706 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) [2022-07-14 13:02:43,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-14 13:02:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:43,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 13:02:43,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:44,002 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 [2022-07-14 13:02:44,106 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-14 13:02:44,107 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 [2022-07-14 13:02:44,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:44,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:44,114 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:44,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [836650264] [2022-07-14 13:02:44,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [836650264] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:44,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:44,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 13:02:44,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682027615] [2022-07-14 13:02:44,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:44,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 13:02:44,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:44,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 13:02:44,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 13:02:44,115 INFO L87 Difference]: Start difference. First operand 1649 states and 2275 transitions. Second operand has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 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) [2022-07-14 13:02:46,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:02:46,432 INFO L93 Difference]: Finished difference Result 2771 states and 3753 transitions. [2022-07-14 13:02:46,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 13:02:46,432 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 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 73 [2022-07-14 13:02:46,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:02:46,437 INFO L225 Difference]: With dead ends: 2771 [2022-07-14 13:02:46,437 INFO L226 Difference]: Without dead ends: 2771 [2022-07-14 13:02:46,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-14 13:02:46,438 INFO L413 NwaCegarLoop]: 807 mSDtfsCounter, 1430 mSDsluCounter, 2180 mSDsCounter, 0 mSdLazyCounter, 2110 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1436 SdHoareTripleChecker+Valid, 2987 SdHoareTripleChecker+Invalid, 2820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 691 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-14 13:02:46,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1436 Valid, 2987 Invalid, 2820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2110 Invalid, 0 Unknown, 691 Unchecked, 2.3s Time] [2022-07-14 13:02:46,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2771 states. [2022-07-14 13:02:46,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2771 to 1648. [2022-07-14 13:02:46,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1193 states have (on average 1.8575020955574182) internal successors, (2216), 1613 states have internal predecessors, (2216), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (29), 24 states have call predecessors, (29), 28 states have call successors, (29) [2022-07-14 13:02:46,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 2273 transitions. [2022-07-14 13:02:46,457 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 2273 transitions. Word has length 73 [2022-07-14 13:02:46,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:02:46,457 INFO L495 AbstractCegarLoop]: Abstraction has 1648 states and 2273 transitions. [2022-07-14 13:02:46,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 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) [2022-07-14 13:02:46,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 2273 transitions. [2022-07-14 13:02:46,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-14 13:02:46,458 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:46,458 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:02:46,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-14 13:02:46,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:02:46,668 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-14 13:02:46,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:46,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1847999062, now seen corresponding path program 1 times [2022-07-14 13:02:46,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:46,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [65676605] [2022-07-14 13:02:46,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:46,669 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:46,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:46,670 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) [2022-07-14 13:02:46,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-14 13:02:46,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:46,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-14 13:02:46,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:46,986 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 [2022-07-14 13:02:46,989 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 [2022-07-14 13:02:49,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 13:02:49,332 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 [2022-07-14 13:02:49,340 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 13:02:49,341 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 [2022-07-14 13:02:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:49,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:49,364 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:49,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [65676605] [2022-07-14 13:02:49,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [65676605] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:49,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:49,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 13:02:49,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488487779] [2022-07-14 13:02:49,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:49,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 13:02:49,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:49,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 13:02:49,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=29, Unknown=1, NotChecked=0, Total=42 [2022-07-14 13:02:49,365 INFO L87 Difference]: Start difference. First operand 1648 states and 2273 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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) [2022-07-14 13:02:53,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:02:53,815 INFO L93 Difference]: Finished difference Result 2842 states and 3878 transitions. [2022-07-14 13:02:53,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 13:02:53,816 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 73 [2022-07-14 13:02:53,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:02:53,826 INFO L225 Difference]: With dead ends: 2842 [2022-07-14 13:02:53,826 INFO L226 Difference]: Without dead ends: 2842 [2022-07-14 13:02:53,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=17, Invalid=38, Unknown=1, NotChecked=0, Total=56 [2022-07-14 13:02:53,827 INFO L413 NwaCegarLoop]: 1061 mSDtfsCounter, 1644 mSDsluCounter, 2300 mSDsCounter, 0 mSdLazyCounter, 3697 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1650 SdHoareTripleChecker+Valid, 3361 SdHoareTripleChecker+Invalid, 4788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 3697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1064 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-07-14 13:02:53,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1650 Valid, 3361 Invalid, 4788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 3697 Invalid, 0 Unknown, 1064 Unchecked, 4.4s Time] [2022-07-14 13:02:53,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2022-07-14 13:02:53,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 1644. [2022-07-14 13:02:53,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1197 states have (on average 1.8412698412698412) internal successors, (2204), 1609 states have internal predecessors, (2204), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (29), 24 states have call predecessors, (29), 28 states have call successors, (29) [2022-07-14 13:02:53,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 2261 transitions. [2022-07-14 13:02:53,862 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 2261 transitions. Word has length 73 [2022-07-14 13:02:53,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:02:53,862 INFO L495 AbstractCegarLoop]: Abstraction has 1644 states and 2261 transitions. [2022-07-14 13:02:53,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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) [2022-07-14 13:02:53,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 2261 transitions. [2022-07-14 13:02:53,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-14 13:02:53,862 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:53,862 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:02:53,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-14 13:02:54,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:02:54,063 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting alt_bzeroErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-14 13:02:54,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:54,063 INFO L85 PathProgramCache]: Analyzing trace with hash 816968073, now seen corresponding path program 1 times [2022-07-14 13:02:54,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:54,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416132558] [2022-07-14 13:02:54,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:54,064 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:54,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:54,065 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) [2022-07-14 13:02:54,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-14 13:02:54,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:54,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-14 13:02:54,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:54,312 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 [2022-07-14 13:02:54,325 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 13 treesize of output 9 [2022-07-14 13:02:54,341 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 21 treesize of output 9 [2022-07-14 13:02:54,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:54,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:54,362 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:54,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416132558] [2022-07-14 13:02:54,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416132558] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:54,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:54,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-14 13:02:54,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121646517] [2022-07-14 13:02:54,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:54,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 13:02:54,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:54,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 13:02:54,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-14 13:02:54,364 INFO L87 Difference]: Start difference. First operand 1644 states and 2261 transitions. Second operand has 8 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 13:02:56,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:02:56,980 INFO L93 Difference]: Finished difference Result 1659 states and 2277 transitions. [2022-07-14 13:02:56,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-14 13:02:56,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 80 [2022-07-14 13:02:56,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:02:56,994 INFO L225 Difference]: With dead ends: 1659 [2022-07-14 13:02:56,994 INFO L226 Difference]: Without dead ends: 1659 [2022-07-14 13:02:56,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-14 13:02:56,995 INFO L413 NwaCegarLoop]: 961 mSDtfsCounter, 23 mSDsluCounter, 3121 mSDsCounter, 0 mSdLazyCounter, 2696 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 4082 SdHoareTripleChecker+Invalid, 2698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-14 13:02:56,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 4082 Invalid, 2698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2696 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-14 13:02:56,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2022-07-14 13:02:57,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1658. [2022-07-14 13:02:57,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1209 states have (on average 1.836228287841191) internal successors, (2220), 1621 states have internal predecessors, (2220), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (29), 24 states have call predecessors, (29), 28 states have call successors, (29) [2022-07-14 13:02:57,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2277 transitions. [2022-07-14 13:02:57,008 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2277 transitions. Word has length 80 [2022-07-14 13:02:57,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:02:57,008 INFO L495 AbstractCegarLoop]: Abstraction has 1658 states and 2277 transitions. [2022-07-14 13:02:57,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 13:02:57,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2277 transitions. [2022-07-14 13:02:57,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-14 13:02:57,009 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:57,009 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:02:57,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-14 13:02:57,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:02:57,220 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting alt_bzeroErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-14 13:02:57,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:57,220 INFO L85 PathProgramCache]: Analyzing trace with hash -443793445, now seen corresponding path program 1 times [2022-07-14 13:02:57,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:57,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819103057] [2022-07-14 13:02:57,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:57,221 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:57,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:57,222 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 13:02:57,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-14 13:02:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:57,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-14 13:02:57,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:57,487 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 [2022-07-14 13:02:57,519 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 13 treesize of output 9 [2022-07-14 13:02:57,524 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 13 treesize of output 9 [2022-07-14 13:02:57,557 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 21 treesize of output 9 [2022-07-14 13:02:57,559 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 7 [2022-07-14 13:02:57,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:57,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:57,612 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:57,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819103057] [2022-07-14 13:02:57,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819103057] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:57,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:57,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-14 13:02:57,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189423570] [2022-07-14 13:02:57,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:57,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 13:02:57,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:57,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 13:02:57,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-14 13:02:57,613 INFO L87 Difference]: Start difference. First operand 1658 states and 2277 transitions. Second operand has 9 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 13:03:01,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:03:01,246 INFO L93 Difference]: Finished difference Result 1658 states and 2275 transitions. [2022-07-14 13:03:01,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-14 13:03:01,246 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 81 [2022-07-14 13:03:01,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:03:01,249 INFO L225 Difference]: With dead ends: 1658 [2022-07-14 13:03:01,249 INFO L226 Difference]: Without dead ends: 1658 [2022-07-14 13:03:01,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-07-14 13:03:01,249 INFO L413 NwaCegarLoop]: 956 mSDtfsCounter, 19 mSDsluCounter, 3924 mSDsCounter, 0 mSdLazyCounter, 2866 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 4880 SdHoareTripleChecker+Invalid, 2867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-14 13:03:01,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 4880 Invalid, 2867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2866 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-07-14 13:03:01,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2022-07-14 13:03:01,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1658. [2022-07-14 13:03:01,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1209 states have (on average 1.8345740281224152) internal successors, (2218), 1621 states have internal predecessors, (2218), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (29), 24 states have call predecessors, (29), 28 states have call successors, (29) [2022-07-14 13:03:01,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2275 transitions. [2022-07-14 13:03:01,261 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2275 transitions. Word has length 81 [2022-07-14 13:03:01,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:03:01,262 INFO L495 AbstractCegarLoop]: Abstraction has 1658 states and 2275 transitions. [2022-07-14 13:03:01,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 13:03:01,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2275 transitions. [2022-07-14 13:03:01,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-14 13:03:01,262 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:03:01,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:03:01,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-14 13:03:01,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:03:01,472 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-14 13:03:01,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:03:01,473 INFO L85 PathProgramCache]: Analyzing trace with hash 540063607, now seen corresponding path program 1 times [2022-07-14 13:03:01,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:03:01,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1074389185] [2022-07-14 13:03:01,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:03:01,473 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:03:01,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:03:01,474 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) [2022-07-14 13:03:01,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-14 13:03:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:03:01,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 13:03:01,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:03:01,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:03:01,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:03:01,744 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:03:01,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1074389185] [2022-07-14 13:03:01,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1074389185] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:03:01,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:03:01,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 13:03:01,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566963477] [2022-07-14 13:03:01,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:03:01,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 13:03:01,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:03:01,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 13:03:01,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 13:03:01,746 INFO L87 Difference]: Start difference. First operand 1658 states and 2275 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 13:03:01,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:03:01,797 INFO L93 Difference]: Finished difference Result 1674 states and 2293 transitions. [2022-07-14 13:03:01,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 13:03:01,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 88 [2022-07-14 13:03:01,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:03:01,800 INFO L225 Difference]: With dead ends: 1674 [2022-07-14 13:03:01,800 INFO L226 Difference]: Without dead ends: 1668 [2022-07-14 13:03:01,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-14 13:03:01,800 INFO L413 NwaCegarLoop]: 964 mSDtfsCounter, 10 mSDsluCounter, 2876 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 3840 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 13:03:01,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 3840 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 13:03:01,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2022-07-14 13:03:01,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 1668. [2022-07-14 13:03:01,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1668 states, 1217 states have (on average 1.8307313064913722) internal successors, (2228), 1631 states have internal predecessors, (2228), 28 states have call successors, (28), 15 states have call predecessors, (28), 16 states have return successors, (31), 24 states have call predecessors, (31), 28 states have call successors, (31) [2022-07-14 13:03:01,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1668 states to 1668 states and 2287 transitions. [2022-07-14 13:03:01,813 INFO L78 Accepts]: Start accepts. Automaton has 1668 states and 2287 transitions. Word has length 88 [2022-07-14 13:03:01,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:03:01,813 INFO L495 AbstractCegarLoop]: Abstraction has 1668 states and 2287 transitions. [2022-07-14 13:03:01,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 13:03:01,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1668 states and 2287 transitions. [2022-07-14 13:03:01,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-14 13:03:01,814 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:03:01,814 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:03:01,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-07-14 13:03:02,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:03:02,024 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-14 13:03:02,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:03:02,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1380796229, now seen corresponding path program 1 times [2022-07-14 13:03:02,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:03:02,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239198165] [2022-07-14 13:03:02,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:03:02,025 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:03:02,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:03:02,026 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 13:03:02,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-14 13:03:02,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:03:02,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 13:03:02,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:03:02,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:03:02,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:03:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:03:02,436 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:03:02,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239198165] [2022-07-14 13:03:02,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239198165] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 13:03:02,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 13:03:02,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-14 13:03:02,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952451714] [2022-07-14 13:03:02,436 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 13:03:02,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 13:03:02,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:03:02,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 13:03:02,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-14 13:03:02,437 INFO L87 Difference]: Start difference. First operand 1668 states and 2287 transitions. Second operand has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 13:03:02,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:03:02,631 INFO L93 Difference]: Finished difference Result 1694 states and 2317 transitions. [2022-07-14 13:03:02,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 13:03:02,631 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 89 [2022-07-14 13:03:02,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:03:02,635 INFO L225 Difference]: With dead ends: 1694 [2022-07-14 13:03:02,635 INFO L226 Difference]: Without dead ends: 1682 [2022-07-14 13:03:02,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2022-07-14 13:03:02,638 INFO L413 NwaCegarLoop]: 967 mSDtfsCounter, 50 mSDsluCounter, 5759 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 6726 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:03:02,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 6726 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 13:03:02,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2022-07-14 13:03:02,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1676. [2022-07-14 13:03:02,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1225 states have (on average 1.826938775510204) internal successors, (2238), 1639 states have internal predecessors, (2238), 28 states have call successors, (28), 15 states have call predecessors, (28), 16 states have return successors, (31), 24 states have call predecessors, (31), 28 states have call successors, (31) [2022-07-14 13:03:02,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 2297 transitions. [2022-07-14 13:03:02,656 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 2297 transitions. Word has length 89 [2022-07-14 13:03:02,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:03:02,657 INFO L495 AbstractCegarLoop]: Abstraction has 1676 states and 2297 transitions. [2022-07-14 13:03:02,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 13:03:02,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 2297 transitions. [2022-07-14 13:03:02,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-14 13:03:02,659 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:03:02,659 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:03:02,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-14 13:03:02,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:03:02,867 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-14 13:03:02,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:03:02,868 INFO L85 PathProgramCache]: Analyzing trace with hash 180173559, now seen corresponding path program 2 times [2022-07-14 13:03:02,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:03:02,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [140591106] [2022-07-14 13:03:02,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 13:03:02,868 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:03:02,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:03:02,869 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) [2022-07-14 13:03:02,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-14 13:03:03,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 13:03:03,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 13:03:03,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-14 13:03:03,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:03:03,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:03:03,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:03:03,651 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:03:03,651 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:03:03,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [140591106] [2022-07-14 13:03:03,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [140591106] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 13:03:03,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 13:03:03,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-14 13:03:03,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958994533] [2022-07-14 13:03:03,652 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 13:03:03,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-14 13:03:03,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:03:03,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-14 13:03:03,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-07-14 13:03:03,653 INFO L87 Difference]: Start difference. First operand 1676 states and 2297 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 13:03:04,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:03:04,162 INFO L93 Difference]: Finished difference Result 1730 states and 2365 transitions. [2022-07-14 13:03:04,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-14 13:03:04,163 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 92 [2022-07-14 13:03:04,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:03:04,165 INFO L225 Difference]: With dead ends: 1730 [2022-07-14 13:03:04,165 INFO L226 Difference]: Without dead ends: 1718 [2022-07-14 13:03:04,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=343, Invalid=649, Unknown=0, NotChecked=0, Total=992 [2022-07-14 13:03:04,166 INFO L413 NwaCegarLoop]: 973 mSDtfsCounter, 88 mSDsluCounter, 6763 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 7736 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 13:03:04,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 7736 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 13:03:04,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2022-07-14 13:03:04,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1694. [2022-07-14 13:03:04,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1694 states, 1243 states have (on average 1.819790828640386) internal successors, (2262), 1657 states have internal predecessors, (2262), 28 states have call successors, (28), 15 states have call predecessors, (28), 16 states have return successors, (31), 24 states have call predecessors, (31), 28 states have call successors, (31) [2022-07-14 13:03:04,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 2321 transitions. [2022-07-14 13:03:04,182 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 2321 transitions. Word has length 92 [2022-07-14 13:03:04,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:03:04,183 INFO L495 AbstractCegarLoop]: Abstraction has 1694 states and 2321 transitions. [2022-07-14 13:03:04,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 13:03:04,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 2321 transitions. [2022-07-14 13:03:04,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-14 13:03:04,184 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:03:04,184 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:03:04,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-14 13:03:04,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:03:04,395 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-14 13:03:04,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:03:04,396 INFO L85 PathProgramCache]: Analyzing trace with hash -231196617, now seen corresponding path program 3 times [2022-07-14 13:03:04,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:03:04,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983302030] [2022-07-14 13:03:04,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 13:03:04,396 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:03:04,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:03:04,397 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) [2022-07-14 13:03:04,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-14 13:03:05,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-14 13:03:05,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 13:03:05,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-14 13:03:05,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:03:05,326 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:03:05,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:03:05,960 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:03:05,960 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:03:05,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983302030] [2022-07-14 13:03:05,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983302030] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 13:03:05,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 13:03:05,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-07-14 13:03:05,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499114173] [2022-07-14 13:03:05,961 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 13:03:05,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-14 13:03:05,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:03:05,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-14 13:03:05,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-07-14 13:03:05,962 INFO L87 Difference]: Start difference. First operand 1694 states and 2321 transitions. Second operand has 28 states, 28 states have (on average 3.857142857142857) internal successors, (108), 28 states have internal predecessors, (108), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 13:03:08,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:03:08,795 INFO L93 Difference]: Finished difference Result 1802 states and 2469 transitions. [2022-07-14 13:03:08,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-14 13:03:08,796 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.857142857142857) internal successors, (108), 28 states have internal predecessors, (108), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 98 [2022-07-14 13:03:08,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:03:08,798 INFO L225 Difference]: With dead ends: 1802 [2022-07-14 13:03:08,798 INFO L226 Difference]: Without dead ends: 1784 [2022-07-14 13:03:08,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=924, Invalid=1832, Unknown=0, NotChecked=0, Total=2756 [2022-07-14 13:03:08,800 INFO L413 NwaCegarLoop]: 985 mSDtfsCounter, 195 mSDsluCounter, 12709 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 13694 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-14 13:03:08,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 13694 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-14 13:03:08,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2022-07-14 13:03:08,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1730. [2022-07-14 13:03:08,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1279 states have (on average 1.8045347928068804) internal successors, (2308), 1693 states have internal predecessors, (2308), 28 states have call successors, (28), 15 states have call predecessors, (28), 16 states have return successors, (31), 24 states have call predecessors, (31), 28 states have call successors, (31) [2022-07-14 13:03:08,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 2367 transitions. [2022-07-14 13:03:08,818 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 2367 transitions. Word has length 98 [2022-07-14 13:03:08,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:03:08,818 INFO L495 AbstractCegarLoop]: Abstraction has 1730 states and 2367 transitions. [2022-07-14 13:03:08,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.857142857142857) internal successors, (108), 28 states have internal predecessors, (108), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 13:03:08,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 2367 transitions. [2022-07-14 13:03:08,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-14 13:03:08,820 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:03:08,820 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:03:08,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-14 13:03:09,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:03:09,034 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-14 13:03:09,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:03:09,034 INFO L85 PathProgramCache]: Analyzing trace with hash 922313399, now seen corresponding path program 4 times [2022-07-14 13:03:09,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:03:09,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002234136] [2022-07-14 13:03:09,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 13:03:09,035 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:03:09,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:03:09,036 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) [2022-07-14 13:03:09,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-14 13:03:09,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 13:03:09,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 13:03:09,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-14 13:03:09,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:03:09,888 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:03:09,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:03:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:03:11,543 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:03:11,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002234136] [2022-07-14 13:03:11,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002234136] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 13:03:11,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 13:03:11,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-07-14 13:03:11,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633095936] [2022-07-14 13:03:11,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 13:03:11,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-14 13:03:11,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:03:11,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-14 13:03:11,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=1927, Unknown=0, NotChecked=0, Total=2652 [2022-07-14 13:03:11,545 INFO L87 Difference]: Start difference. First operand 1730 states and 2367 transitions. Second operand has 52 states, 52 states have (on average 2.5384615384615383) internal successors, (132), 52 states have internal predecessors, (132), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 13:03:19,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:03:19,604 INFO L93 Difference]: Finished difference Result 1936 states and 2637 transitions. [2022-07-14 13:03:19,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-14 13:03:19,605 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.5384615384615383) internal successors, (132), 52 states have internal predecessors, (132), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 110 [2022-07-14 13:03:19,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:03:19,609 INFO L225 Difference]: With dead ends: 1936 [2022-07-14 13:03:19,609 INFO L226 Difference]: Without dead ends: 1924 [2022-07-14 13:03:19,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=4121, Invalid=9921, Unknown=0, NotChecked=0, Total=14042 [2022-07-14 13:03:19,613 INFO L413 NwaCegarLoop]: 1007 mSDtfsCounter, 478 mSDsluCounter, 26903 mSDsCounter, 0 mSdLazyCounter, 2517 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 27910 SdHoareTripleChecker+Invalid, 2954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 2517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-14 13:03:19,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 27910 Invalid, 2954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 2517 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-14 13:03:19,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2022-07-14 13:03:19,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1798. [2022-07-14 13:03:19,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1347 states have (on average 1.78173719376392) internal successors, (2400), 1761 states have internal predecessors, (2400), 28 states have call successors, (28), 15 states have call predecessors, (28), 16 states have return successors, (31), 24 states have call predecessors, (31), 28 states have call successors, (31) [2022-07-14 13:03:19,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 2459 transitions. [2022-07-14 13:03:19,629 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 2459 transitions. Word has length 110 [2022-07-14 13:03:19,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:03:19,629 INFO L495 AbstractCegarLoop]: Abstraction has 1798 states and 2459 transitions. [2022-07-14 13:03:19,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.5384615384615383) internal successors, (132), 52 states have internal predecessors, (132), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 13:03:19,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 2459 transitions. [2022-07-14 13:03:19,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-14 13:03:19,630 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:03:19,630 INFO L195 NwaCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:03:19,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-14 13:03:19,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:03:19,843 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-14 13:03:19,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:03:19,843 INFO L85 PathProgramCache]: Analyzing trace with hash 897981943, now seen corresponding path program 5 times [2022-07-14 13:03:19,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:03:19,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1206311848] [2022-07-14 13:03:19,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 13:03:19,844 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:03:19,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:03:19,848 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) [2022-07-14 13:03:19,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-14 13:03:21,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-07-14 13:03:21,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 13:03:21,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-14 13:03:21,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:03:21,115 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 [2022-07-14 13:03:21,221 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 13:03:21,221 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 [2022-07-14 13:03:21,245 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 13 treesize of output 9 [2022-07-14 13:03:21,312 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 22 treesize of output 10 [2022-07-14 13:03:22,620 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 13:03:22,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-07-14 13:03:22,649 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 31 treesize of output 13 [2022-07-14 13:03:22,676 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2022-07-14 13:03:22,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:03:22,951 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:03:22,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1206311848] [2022-07-14 13:03:22,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1206311848] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 13:03:22,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [984941698] [2022-07-14 13:03:22,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 13:03:22,951 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 13:03:22,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 13:03:22,952 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 13:03:22,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-07-14 13:04:47,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-07-14 13:04:47,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 13:04:47,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-14 13:04:47,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:04:47,772 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 [2022-07-14 13:04:47,854 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 13:04:47,857 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 [2022-07-14 13:04:47,867 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 13 treesize of output 9 [2022-07-14 13:04:47,908 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 22 treesize of output 10 [2022-07-14 13:04:49,186 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 13:04:49,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-07-14 13:04:49,214 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 31 treesize of output 13 [2022-07-14 13:04:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2022-07-14 13:04:49,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:04:49,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [984941698] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 13:04:49,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 13:04:49,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2022-07-14 13:04:49,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360598737] [2022-07-14 13:04:49,445 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 13:04:49,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-14 13:04:49,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:04:49,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-14 13:04:49,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=213, Unknown=18, NotChecked=0, Total=272 [2022-07-14 13:04:49,446 INFO L87 Difference]: Start difference. First operand 1798 states and 2459 transitions. Second operand has 14 states, 12 states have (on average 7.083333333333333) internal successors, (85), 12 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 13:04:54,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:04:54,643 INFO L93 Difference]: Finished difference Result 3156 states and 4275 transitions. [2022-07-14 13:04:54,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-14 13:04:54,644 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 7.083333333333333) internal successors, (85), 12 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 132 [2022-07-14 13:04:54,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:04:54,647 INFO L225 Difference]: With dead ends: 3156 [2022-07-14 13:04:54,647 INFO L226 Difference]: Without dead ends: 3156 [2022-07-14 13:04:54,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 165 SyntacticMatches, 91 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=95, Invalid=478, Unknown=27, NotChecked=0, Total=600 [2022-07-14 13:04:54,648 INFO L413 NwaCegarLoop]: 800 mSDtfsCounter, 1768 mSDsluCounter, 7560 mSDsCounter, 0 mSdLazyCounter, 4880 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1773 SdHoareTripleChecker+Valid, 8360 SdHoareTripleChecker+Invalid, 9924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 4880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5013 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-07-14 13:04:54,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1773 Valid, 8360 Invalid, 9924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 4880 Invalid, 0 Unknown, 5013 Unchecked, 5.0s Time] [2022-07-14 13:04:54,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3156 states. [2022-07-14 13:04:54,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3156 to 1795. [2022-07-14 13:04:54,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1347 states have (on average 1.77728285077951) internal successors, (2394), 1758 states have internal predecessors, (2394), 28 states have call successors, (28), 15 states have call predecessors, (28), 16 states have return successors, (31), 24 states have call predecessors, (31), 28 states have call successors, (31) [2022-07-14 13:04:54,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 2453 transitions. [2022-07-14 13:04:54,663 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 2453 transitions. Word has length 132 [2022-07-14 13:04:54,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:04:54,664 INFO L495 AbstractCegarLoop]: Abstraction has 1795 states and 2453 transitions. [2022-07-14 13:04:54,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 7.083333333333333) internal successors, (85), 12 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 13:04:54,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 2453 transitions. [2022-07-14 13:04:54,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-14 13:04:54,665 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:04:54,665 INFO L195 NwaCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:04:54,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-07-14 13:04:54,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-14 13:04:55,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:04:55,080 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr79REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-14 13:04:55,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:04:55,080 INFO L85 PathProgramCache]: Analyzing trace with hash 897981944, now seen corresponding path program 1 times [2022-07-14 13:04:55,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:04:55,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1236749914] [2022-07-14 13:04:55,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:04:55,081 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:04:55,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:04:55,082 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) [2022-07-14 13:04:55,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-14 13:04:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:04:55,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 120 conjunts are in the unsatisfiable core [2022-07-14 13:04:55,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:04:55,862 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 [2022-07-14 13:04:56,029 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 [2022-07-14 13:04:56,057 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 13:04:56,058 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 [2022-07-14 13:04:56,078 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 13 treesize of output 9 [2022-07-14 13:04:56,084 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 13 treesize of output 9 [2022-07-14 13:04:56,174 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 18 treesize of output 10 [2022-07-14 13:04:56,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-14 13:04:57,376 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3621 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_alt_bzero_#in~a#1.base| v_ArrVal_3621))) (exists ((v_ArrVal_3620 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_alt_bzero_#in~a#1.base| v_ArrVal_3620) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_31 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_31)))) is different from true [2022-07-14 13:04:57,401 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 13:04:57,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-07-14 13:04:57,405 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 22 treesize of output 24 [2022-07-14 13:04:57,439 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 25 treesize of output 13 [2022-07-14 13:04:57,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 13:04:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 903 trivial. 44 not checked. [2022-07-14 13:04:57,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:04:58,136 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3713 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3712 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_3712) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0) (_ bv20 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_3713) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0))))) (forall ((v_ArrVal_3712 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_3712) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|)))) (bvule (bvadd (_ bv16 32) .cse1) (bvadd .cse1 (_ bv20 32)))))) is different from false [2022-07-14 13:04:58,140 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:04:58,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1236749914] [2022-07-14 13:04:58,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1236749914] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 13:04:58,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1679501828] [2022-07-14 13:04:58,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:04:58,140 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 13:04:58,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 13:04:58,141 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 13:04:58,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process