./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 791161d1 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_SFH_test6-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1d2a98d270a821b4275b6b35f502458543f3a892fcdda158c69925a18d34f6cf --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 13:10:47,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 13:10:47,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 13:10:47,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 13:10:47,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 13:10:47,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 13:10:47,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 13:10:47,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 13:10:47,551 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 13:10:47,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 13:10:47,557 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 13:10:47,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 13:10:47,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 13:10:47,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 13:10:47,564 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 13:10:47,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 13:10:47,567 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 13:10:47,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 13:10:47,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 13:10:47,573 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 13:10:47,576 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 13:10:47,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 13:10:47,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 13:10:47,578 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 13:10:47,579 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 13:10:47,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 13:10:47,582 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 13:10:47,582 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 13:10:47,583 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 13:10:47,583 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 13:10:47,584 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 13:10:47,584 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 13:10:47,586 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 13:10:47,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 13:10:47,586 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 13:10:47,587 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 13:10:47,587 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 13:10:47,588 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 13:10:47,588 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 13:10:47,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 13:10:47,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 13:10:47,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 13:10:47,591 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-23 13:10:47,613 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 13:10:47,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 13:10:47,614 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 13:10:47,614 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 13:10:47,615 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 13:10:47,615 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 13:10:47,615 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 13:10:47,616 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 13:10:47,616 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 13:10:47,616 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 13:10:47,617 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 13:10:47,617 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 13:10:47,617 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 13:10:47,617 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 13:10:47,617 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 13:10:47,617 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 13:10:47,617 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 13:10:47,617 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 13:10:47,618 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 13:10:47,618 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 13:10:47,619 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 13:10:47,619 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 13:10:47,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 13:10:47,619 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 13:10:47,619 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 13:10:47,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 13:10:47,620 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 13:10:47,620 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 13:10:47,620 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 13:10:47,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 13:10:47,620 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d2a98d270a821b4275b6b35f502458543f3a892fcdda158c69925a18d34f6cf [2022-07-23 13:10:47,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 13:10:47,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 13:10:47,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 13:10:47,835 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 13:10:47,836 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 13:10:47,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-2.i [2022-07-23 13:10:47,888 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/478f1d58b/c1b5d8bb37b34fd5981171a61bb9afac/FLAG4d06e4e0c [2022-07-23 13:10:48,330 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 13:10:48,339 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-2.i [2022-07-23 13:10:48,361 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/478f1d58b/c1b5d8bb37b34fd5981171a61bb9afac/FLAG4d06e4e0c [2022-07-23 13:10:48,682 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/478f1d58b/c1b5d8bb37b34fd5981171a61bb9afac [2022-07-23 13:10:48,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 13:10:48,685 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 13:10:48,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 13:10:48,686 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 13:10:48,689 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 13:10:48,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 01:10:48" (1/1) ... [2022-07-23 13:10:48,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55726e7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:10:48, skipping insertion in model container [2022-07-23 13:10:48,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 01:10:48" (1/1) ... [2022-07-23 13:10:48,695 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 13:10:48,739 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 13:10:49,127 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_SFH_test6-2.i[44118,44131] [2022-07-23 13:10:49,141 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_SFH_test6-2.i[44660,44673] [2022-07-23 13:10:49,241 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_SFH_test6-2.i[56247,56260] [2022-07-23 13:10:49,246 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_SFH_test6-2.i[56368,56381] [2022-07-23 13:10:49,260 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 13:10:49,272 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) [2022-07-23 13:10:49,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1b2fb467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:10:49, skipping insertion in model container [2022-07-23 13:10:49,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 13:10:49,273 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-23 13:10:49,274 INFO L158 Benchmark]: Toolchain (without parser) took 588.28ms. Allocated memory is still 100.7MB. Free memory was 66.0MB in the beginning and 73.9MB in the end (delta: -7.9MB). Peak memory consumption was 24.7MB. Max. memory is 16.1GB. [2022-07-23 13:10:49,275 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 81.8MB. Free memory is still 49.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-23 13:10:49,275 INFO L158 Benchmark]: CACSL2BoogieTranslator took 586.60ms. Allocated memory is still 100.7MB. Free memory was 65.8MB in the beginning and 73.9MB in the end (delta: -8.1MB). Peak memory consumption was 24.7MB. Max. memory is 16.1GB. [2022-07-23 13:10:49,276 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 81.8MB. Free memory is still 49.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 586.60ms. Allocated memory is still 100.7MB. Free memory was 65.8MB in the beginning and 73.9MB in the end (delta: -8.1MB). Peak memory consumption was 24.7MB. 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_SFH_test6-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1d2a98d270a821b4275b6b35f502458543f3a892fcdda158c69925a18d34f6cf --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 13:10:50,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 13:10:50,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 13:10:50,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 13:10:50,665 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 13:10:50,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 13:10:50,669 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 13:10:50,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 13:10:50,673 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 13:10:50,678 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 13:10:50,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 13:10:50,682 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 13:10:50,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 13:10:50,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 13:10:50,684 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 13:10:50,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 13:10:50,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 13:10:50,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 13:10:50,690 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 13:10:50,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 13:10:50,694 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 13:10:50,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 13:10:50,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 13:10:50,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 13:10:50,697 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 13:10:50,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 13:10:50,700 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 13:10:50,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 13:10:50,701 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 13:10:50,702 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 13:10:50,702 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 13:10:50,702 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 13:10:50,704 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 13:10:50,704 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 13:10:50,705 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 13:10:50,706 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 13:10:50,706 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 13:10:50,706 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 13:10:50,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 13:10:50,707 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 13:10:50,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 13:10:50,708 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 13:10:50,709 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-23 13:10:50,745 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 13:10:50,746 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 13:10:50,746 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 13:10:50,746 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 13:10:50,747 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 13:10:50,747 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 13:10:50,747 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 13:10:50,747 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 13:10:50,748 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 13:10:50,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 13:10:50,748 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 13:10:50,749 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 13:10:50,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 13:10:50,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 13:10:50,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 13:10:50,749 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 13:10:50,749 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 13:10:50,749 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 13:10:50,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 13:10:50,750 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 13:10:50,750 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-23 13:10:50,750 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-23 13:10:50,750 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 13:10:50,750 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 13:10:50,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 13:10:50,751 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 13:10:50,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 13:10:50,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 13:10:50,751 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 13:10:50,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 13:10:50,751 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-23 13:10:50,752 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-23 13:10:50,752 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-23 13:10:50,752 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d2a98d270a821b4275b6b35f502458543f3a892fcdda158c69925a18d34f6cf [2022-07-23 13:10:50,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 13:10:51,013 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 13:10:51,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 13:10:51,015 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 13:10:51,016 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 13:10:51,017 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-2.i [2022-07-23 13:10:51,064 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f523bcff/fddebef38047403d8a6ae9c01a01429f/FLAG70f84d2c4 [2022-07-23 13:10:51,524 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 13:10:51,524 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-2.i [2022-07-23 13:10:51,545 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f523bcff/fddebef38047403d8a6ae9c01a01429f/FLAG70f84d2c4 [2022-07-23 13:10:51,563 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f523bcff/fddebef38047403d8a6ae9c01a01429f [2022-07-23 13:10:51,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 13:10:51,566 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 13:10:51,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 13:10:51,567 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 13:10:51,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 13:10:51,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 01:10:51" (1/1) ... [2022-07-23 13:10:51,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fc5d053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:10:51, skipping insertion in model container [2022-07-23 13:10:51,571 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 01:10:51" (1/1) ... [2022-07-23 13:10:51,576 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 13:10:51,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 13:10:51,941 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_SFH_test6-2.i[44118,44131] [2022-07-23 13:10:51,951 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_SFH_test6-2.i[44660,44673] [2022-07-23 13:10:52,056 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_SFH_test6-2.i[56247,56260] [2022-07-23 13:10:52,059 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_SFH_test6-2.i[56368,56381] [2022-07-23 13:10:52,069 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 13:10:52,086 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-23 13:10:52,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 13:10:52,113 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_SFH_test6-2.i[44118,44131] [2022-07-23 13:10:52,114 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_SFH_test6-2.i[44660,44673] [2022-07-23 13:10:52,165 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_SFH_test6-2.i[56247,56260] [2022-07-23 13:10:52,166 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_SFH_test6-2.i[56368,56381] [2022-07-23 13:10:52,195 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 13:10:52,203 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 13:10:52,229 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_SFH_test6-2.i[44118,44131] [2022-07-23 13:10:52,231 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_SFH_test6-2.i[44660,44673] [2022-07-23 13:10:52,251 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_SFH_test6-2.i[56247,56260] [2022-07-23 13:10:52,252 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_SFH_test6-2.i[56368,56381] [2022-07-23 13:10:52,255 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 13:10:52,295 INFO L208 MainTranslator]: Completed translation [2022-07-23 13:10:52,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:10:52 WrapperNode [2022-07-23 13:10:52,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 13:10:52,297 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 13:10:52,297 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 13:10:52,297 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 13:10:52,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:10:52" (1/1) ... [2022-07-23 13:10:52,342 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:10:52" (1/1) ... [2022-07-23 13:10:52,387 INFO L137 Inliner]: procedures = 285, calls = 347, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 1204 [2022-07-23 13:10:52,387 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 13:10:52,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 13:10:52,388 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 13:10:52,388 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 13:10:52,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:10:52" (1/1) ... [2022-07-23 13:10:52,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:10:52" (1/1) ... [2022-07-23 13:10:52,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:10:52" (1/1) ... [2022-07-23 13:10:52,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:10:52" (1/1) ... [2022-07-23 13:10:52,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:10:52" (1/1) ... [2022-07-23 13:10:52,471 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:10:52" (1/1) ... [2022-07-23 13:10:52,492 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:10:52" (1/1) ... [2022-07-23 13:10:52,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 13:10:52,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 13:10:52,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 13:10:52,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 13:10:52,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:10:52" (1/1) ... [2022-07-23 13:10:52,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 13:10:52,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:10:52,528 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) [2022-07-23 13:10:52,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-23 13:10:52,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-23 13:10:52,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-23 13:10:52,555 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-07-23 13:10:52,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-23 13:10:52,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 13:10:52,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-23 13:10:52,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-23 13:10:52,555 INFO L130 BoogieDeclarations]: Found specification of procedure alt_bzero [2022-07-23 13:10:52,555 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_bzero [2022-07-23 13:10:52,555 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-23 13:10:52,556 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-23 13:10:52,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-23 13:10:52,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-23 13:10:52,556 INFO L130 BoogieDeclarations]: Found specification of procedure alt_malloc [2022-07-23 13:10:52,556 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_malloc [2022-07-23 13:10:52,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-23 13:10:52,557 INFO L130 BoogieDeclarations]: Found specification of procedure alt_free [2022-07-23 13:10:52,557 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_free [2022-07-23 13:10:52,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 13:10:52,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 13:10:52,543 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 [2022-07-23 13:10:52,768 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 13:10:52,769 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 13:10:56,133 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 13:10:56,146 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 13:10:56,149 INFO L299 CfgBuilder]: Removed 72 assume(true) statements. [2022-07-23 13:10:56,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 01:10:56 BoogieIcfgContainer [2022-07-23 13:10:56,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 13:10:56,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 13:10:56,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 13:10:56,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 13:10:56,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 01:10:51" (1/3) ... [2022-07-23 13:10:56,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6747b934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 01:10:56, skipping insertion in model container [2022-07-23 13:10:56,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:10:52" (2/3) ... [2022-07-23 13:10:56,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6747b934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 01:10:56, skipping insertion in model container [2022-07-23 13:10:56,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 01:10:56" (3/3) ... [2022-07-23 13:10:56,157 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test6-2.i [2022-07-23 13:10:56,166 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 13:10:56,166 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 634 error locations. [2022-07-23 13:10:56,215 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 13:10:56,220 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@618a9d0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@33a48f6b [2022-07-23 13:10:56,221 INFO L358 AbstractCegarLoop]: Starting to check reachability of 634 error locations. [2022-07-23 13:10:56,228 INFO L276 IsEmpty]: Start isEmpty. Operand has 1280 states, 626 states have (on average 2.2444089456869007) internal successors, (1405), 1260 states have internal predecessors, (1405), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-23 13:10:56,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-23 13:10:56,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:10:56,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-23 13:10:56,233 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-23 13:10:56,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:10:56,236 INFO L85 PathProgramCache]: Analyzing trace with hash 77521, now seen corresponding path program 1 times [2022-07-23 13:10:56,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:10:56,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678420135] [2022-07-23 13:10:56,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:10:56,244 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:10:56,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:10:56,247 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) [2022-07-23 13:10:56,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-23 13:10:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:10:56,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 13:10:56,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:10:56,431 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 [2022-07-23 13:10:56,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:10:56,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:10:56,466 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:10:56,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678420135] [2022-07-23 13:10:56,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1678420135] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:10:56,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:10:56,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 13:10:56,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116557920] [2022-07-23 13:10:56,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:10:56,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 13:10:56,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:10:56,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 13:10:56,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 13:10:56,508 INFO L87 Difference]: Start difference. First operand has 1280 states, 626 states have (on average 2.2444089456869007) internal successors, (1405), 1260 states have internal predecessors, (1405), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) 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) [2022-07-23 13:10:58,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:10:58,157 INFO L93 Difference]: Finished difference Result 1537 states and 1627 transitions. [2022-07-23 13:10:58,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 13:10:58,159 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 [2022-07-23 13:10:58,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:10:58,172 INFO L225 Difference]: With dead ends: 1537 [2022-07-23 13:10:58,173 INFO L226 Difference]: Without dead ends: 1535 [2022-07-23 13:10:58,174 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 [2022-07-23 13:10:58,176 INFO L413 NwaCegarLoop]: 911 mSDtfsCounter, 906 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-23 13:10:58,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 1258 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-23 13:10:58,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2022-07-23 13:10:58,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1300. [2022-07-23 13:10:58,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 660 states have (on average 2.106060606060606) internal successors, (1390), 1281 states have internal predecessors, (1390), 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) [2022-07-23 13:10:58,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 1420 transitions. [2022-07-23 13:10:58,252 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 1420 transitions. Word has length 3 [2022-07-23 13:10:58,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:10:58,252 INFO L495 AbstractCegarLoop]: Abstraction has 1300 states and 1420 transitions. [2022-07-23 13:10:58,252 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) [2022-07-23 13:10:58,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 1420 transitions. [2022-07-23 13:10:58,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-23 13:10:58,253 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:10:58,253 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-23 13:10:58,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-23 13:10:58,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:10:58,460 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-23 13:10:58,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:10:58,461 INFO L85 PathProgramCache]: Analyzing trace with hash 77522, now seen corresponding path program 1 times [2022-07-23 13:10:58,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:10:58,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1361630128] [2022-07-23 13:10:58,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:10:58,462 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:10:58,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:10:58,463 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) [2022-07-23 13:10:58,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-23 13:10:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:10:58,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 13:10:58,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:10:58,573 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 [2022-07-23 13:10:58,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:10:58,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:10:58,580 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:10:58,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1361630128] [2022-07-23 13:10:58,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1361630128] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:10:58,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:10:58,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 13:10:58,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979413475] [2022-07-23 13:10:58,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:10:58,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 13:10:58,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:10:58,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 13:10:58,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 13:10:58,583 INFO L87 Difference]: Start difference. First operand 1300 states and 1420 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) [2022-07-23 13:11:00,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:11:00,947 INFO L93 Difference]: Finished difference Result 1891 states and 2058 transitions. [2022-07-23 13:11:00,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 13:11:00,948 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 [2022-07-23 13:11:00,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:11:00,953 INFO L225 Difference]: With dead ends: 1891 [2022-07-23 13:11:00,953 INFO L226 Difference]: Without dead ends: 1891 [2022-07-23 13:11:00,953 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 [2022-07-23 13:11:00,954 INFO L413 NwaCegarLoop]: 1055 mSDtfsCounter, 624 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 1758 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-23 13:11:00,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 1758 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-23 13:11:00,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2022-07-23 13:11:00,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1504. [2022-07-23 13:11:00,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 863 states have (on average 2.0880648899188876) internal successors, (1802), 1483 states have internal predecessors, (1802), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-23 13:11:00,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 1836 transitions. [2022-07-23 13:11:00,986 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 1836 transitions. Word has length 3 [2022-07-23 13:11:00,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:11:00,987 INFO L495 AbstractCegarLoop]: Abstraction has 1504 states and 1836 transitions. [2022-07-23 13:11:00,987 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) [2022-07-23 13:11:00,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 1836 transitions. [2022-07-23 13:11:00,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-23 13:11:00,989 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:11:00,989 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:11:00,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-23 13:11:01,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:11:01,196 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-23 13:11:01,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:11:01,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1111693489, now seen corresponding path program 1 times [2022-07-23 13:11:01,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:11:01,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [653376176] [2022-07-23 13:11:01,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:11:01,198 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:11:01,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:11:01,199 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) [2022-07-23 13:11:01,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-23 13:11:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:11:01,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 13:11:01,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:11:01,321 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 [2022-07-23 13:11:01,325 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 [2022-07-23 13:11:01,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 13:11:01,362 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 [2022-07-23 13:11:01,369 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 13:11:01,369 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 [2022-07-23 13:11:01,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:11:01,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:11:01,390 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:11:01,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [653376176] [2022-07-23 13:11:01,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [653376176] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:11:01,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:11:01,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 13:11:01,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048923009] [2022-07-23 13:11:01,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:11:01,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 13:11:01,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:11:01,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 13:11:01,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 13:11:01,392 INFO L87 Difference]: Start difference. First operand 1504 states and 1836 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) [2022-07-23 13:11:04,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:11:04,398 INFO L93 Difference]: Finished difference Result 2569 states and 2979 transitions. [2022-07-23 13:11:04,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 13:11:04,399 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 [2022-07-23 13:11:04,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:11:04,405 INFO L225 Difference]: With dead ends: 2569 [2022-07-23 13:11:04,405 INFO L226 Difference]: Without dead ends: 2569 [2022-07-23 13:11:04,405 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 [2022-07-23 13:11:04,406 INFO L413 NwaCegarLoop]: 718 mSDtfsCounter, 2002 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2008 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-23 13:11:04,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2008 Valid, 1477 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-23 13:11:04,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2022-07-23 13:11:04,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 1649. [2022-07-23 13:11:04,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1008 states have (on average 2.068452380952381) internal successors, (2085), 1628 states have internal predecessors, (2085), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-23 13:11:04,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2119 transitions. [2022-07-23 13:11:04,434 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2119 transitions. Word has length 8 [2022-07-23 13:11:04,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:11:04,434 INFO L495 AbstractCegarLoop]: Abstraction has 1649 states and 2119 transitions. [2022-07-23 13:11:04,435 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) [2022-07-23 13:11:04,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2119 transitions. [2022-07-23 13:11:04,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-23 13:11:04,435 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:11:04,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:11:04,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-07-23 13:11:04,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:11:04,642 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-23 13:11:04,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:11:04,645 INFO L85 PathProgramCache]: Analyzing trace with hash -102759776, now seen corresponding path program 1 times [2022-07-23 13:11:04,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:11:04,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248353574] [2022-07-23 13:11:04,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:11:04,645 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:11:04,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:11:04,647 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) [2022-07-23 13:11:04,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-23 13:11:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:11:04,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 13:11:04,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:11:04,757 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 [2022-07-23 13:11:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:11:04,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:11:04,768 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:11:04,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248353574] [2022-07-23 13:11:04,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248353574] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:11:04,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:11:04,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 13:11:04,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944641643] [2022-07-23 13:11:04,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:11:04,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 13:11:04,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:11:04,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 13:11:04,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 13:11:04,769 INFO L87 Difference]: Start difference. First operand 1649 states and 2119 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) [2022-07-23 13:11:07,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:11:07,175 INFO L93 Difference]: Finished difference Result 2811 states and 3512 transitions. [2022-07-23 13:11:07,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 13:11:07,176 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 [2022-07-23 13:11:07,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:11:07,184 INFO L225 Difference]: With dead ends: 2811 [2022-07-23 13:11:07,184 INFO L226 Difference]: Without dead ends: 2811 [2022-07-23 13:11:07,184 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 [2022-07-23 13:11:07,185 INFO L413 NwaCegarLoop]: 1321 mSDtfsCounter, 2333 mSDsluCounter, 1258 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2339 SdHoareTripleChecker+Valid, 2579 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-23 13:11:07,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2339 Valid, 2579 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1784 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-23 13:11:07,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2022-07-23 13:11:07,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 1604. [2022-07-23 13:11:07,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1008 states have (on average 2.009920634920635) internal successors, (2026), 1583 states have internal predecessors, (2026), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-23 13:11:07,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2060 transitions. [2022-07-23 13:11:07,212 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2060 transitions. Word has length 9 [2022-07-23 13:11:07,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:11:07,213 INFO L495 AbstractCegarLoop]: Abstraction has 1604 states and 2060 transitions. [2022-07-23 13:11:07,213 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) [2022-07-23 13:11:07,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2060 transitions. [2022-07-23 13:11:07,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-23 13:11:07,214 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:11:07,214 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:11:07,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-07-23 13:11:07,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:11:07,421 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-23 13:11:07,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:11:07,421 INFO L85 PathProgramCache]: Analyzing trace with hash -102759775, now seen corresponding path program 1 times [2022-07-23 13:11:07,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:11:07,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038723989] [2022-07-23 13:11:07,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:11:07,422 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:11:07,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:11:07,423 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) [2022-07-23 13:11:07,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-23 13:11:07,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:11:07,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 13:11:07,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:11:07,533 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 [2022-07-23 13:11:07,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:11:07,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:11:07,557 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:11:07,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038723989] [2022-07-23 13:11:07,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038723989] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:11:07,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:11:07,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 13:11:07,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45899357] [2022-07-23 13:11:07,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:11:07,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 13:11:07,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:11:07,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 13:11:07,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 13:11:07,559 INFO L87 Difference]: Start difference. First operand 1604 states and 2060 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) [2022-07-23 13:11:10,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:11:10,303 INFO L93 Difference]: Finished difference Result 2440 states and 3105 transitions. [2022-07-23 13:11:10,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 13:11:10,304 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 [2022-07-23 13:11:10,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:11:10,310 INFO L225 Difference]: With dead ends: 2440 [2022-07-23 13:11:10,310 INFO L226 Difference]: Without dead ends: 2440 [2022-07-23 13:11:10,311 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 [2022-07-23 13:11:10,311 INFO L413 NwaCegarLoop]: 1513 mSDtfsCounter, 1581 mSDsluCounter, 1207 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1586 SdHoareTripleChecker+Valid, 2720 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-23 13:11:10,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1586 Valid, 2720 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1626 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-23 13:11:10,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2022-07-23 13:11:10,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 1594. [2022-07-23 13:11:10,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1008 states have (on average 1.9861111111111112) internal successors, (2002), 1573 states have internal predecessors, (2002), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-23 13:11:10,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2036 transitions. [2022-07-23 13:11:10,335 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2036 transitions. Word has length 9 [2022-07-23 13:11:10,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:11:10,336 INFO L495 AbstractCegarLoop]: Abstraction has 1594 states and 2036 transitions. [2022-07-23 13:11:10,336 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) [2022-07-23 13:11:10,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2036 transitions. [2022-07-23 13:11:10,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-23 13:11:10,336 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:11:10,337 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:11:10,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-23 13:11:10,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:11:10,547 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr516ASSERT_VIOLATIONMEMORY_LEAK === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-23 13:11:10,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:11:10,547 INFO L85 PathProgramCache]: Analyzing trace with hash -856298529, now seen corresponding path program 1 times [2022-07-23 13:11:10,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:11:10,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614060790] [2022-07-23 13:11:10,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:11:10,549 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:11:10,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:11:10,550 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) [2022-07-23 13:11:10,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-23 13:11:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:11:10,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 13:11:10,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:11:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:11:10,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:11:10,698 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:11:10,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614060790] [2022-07-23 13:11:10,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614060790] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:11:10,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:11:10,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:11:10,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796722030] [2022-07-23 13:11:10,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:11:10,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 13:11:10,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:11:10,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 13:11:10,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 13:11:10,700 INFO L87 Difference]: Start difference. First operand 1594 states and 2036 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) [2022-07-23 13:11:11,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:11:11,267 INFO L93 Difference]: Finished difference Result 2264 states and 2809 transitions. [2022-07-23 13:11:11,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 13:11:11,268 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 [2022-07-23 13:11:11,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:11:11,274 INFO L225 Difference]: With dead ends: 2264 [2022-07-23 13:11:11,274 INFO L226 Difference]: Without dead ends: 2264 [2022-07-23 13:11:11,274 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 [2022-07-23 13:11:11,275 INFO L413 NwaCegarLoop]: 1454 mSDtfsCounter, 748 mSDsluCounter, 2419 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 3873 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 13:11:11,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [759 Valid, 3873 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-23 13:11:11,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2022-07-23 13:11:11,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1852. [2022-07-23 13:11:11,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1263 states have (on average 1.990498812351544) internal successors, (2514), 1828 states have internal predecessors, (2514), 20 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-23 13:11:11,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 2554 transitions. [2022-07-23 13:11:11,330 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 2554 transitions. Word has length 11 [2022-07-23 13:11:11,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:11:11,330 INFO L495 AbstractCegarLoop]: Abstraction has 1852 states and 2554 transitions. [2022-07-23 13:11:11,330 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) [2022-07-23 13:11:11,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 2554 transitions. [2022-07-23 13:11:11,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 13:11:11,330 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:11:11,330 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:11:11,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-23 13:11:11,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:11:11,531 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-23 13:11:11,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:11:11,531 INFO L85 PathProgramCache]: Analyzing trace with hash 2126591358, now seen corresponding path program 1 times [2022-07-23 13:11:11,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:11:11,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820733420] [2022-07-23 13:11:11,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:11:11,533 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:11:11,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:11:11,536 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) [2022-07-23 13:11:11,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-23 13:11:11,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:11:11,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 13:11:11,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:11:11,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 13:11:11,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 13:11:11,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 13:11:11,717 INFO L356 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2022-07-23 13:11:11,717 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 [2022-07-23 13:11:11,755 INFO L356 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-07-23 13:11:11,755 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 [2022-07-23 13:11:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:11:11,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:11:11,770 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:11:11,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [820733420] [2022-07-23 13:11:11,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [820733420] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:11:11,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:11:11,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:11:11,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385936130] [2022-07-23 13:11:11,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:11:11,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 13:11:11,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:11:11,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 13:11:11,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 13:11:11,772 INFO L87 Difference]: Start difference. First operand 1852 states and 2554 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) [2022-07-23 13:11:12,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:11:12,809 INFO L93 Difference]: Finished difference Result 2000 states and 2409 transitions. [2022-07-23 13:11:12,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 13:11:12,810 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 [2022-07-23 13:11:12,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:11:12,815 INFO L225 Difference]: With dead ends: 2000 [2022-07-23 13:11:12,815 INFO L226 Difference]: Without dead ends: 2000 [2022-07-23 13:11:12,815 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 [2022-07-23 13:11:12,816 INFO L413 NwaCegarLoop]: 1391 mSDtfsCounter, 501 mSDsluCounter, 2482 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 3873 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-23 13:11:12,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 3873 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-23 13:11:12,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2022-07-23 13:11:12,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1494. [2022-07-23 13:11:12,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 907 states have (on average 1.9757442116868797) internal successors, (1792), 1472 states have internal predecessors, (1792), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-23 13:11:12,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 1828 transitions. [2022-07-23 13:11:12,833 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 1828 transitions. Word has length 14 [2022-07-23 13:11:12,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:11:12,833 INFO L495 AbstractCegarLoop]: Abstraction has 1494 states and 1828 transitions. [2022-07-23 13:11:12,834 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) [2022-07-23 13:11:12,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 1828 transitions. [2022-07-23 13:11:12,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-23 13:11:12,834 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:11:12,834 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:11:12,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-23 13:11:13,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:11:13,042 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-23 13:11:13,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:11:13,043 INFO L85 PathProgramCache]: Analyzing trace with hash 769788685, now seen corresponding path program 1 times [2022-07-23 13:11:13,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:11:13,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [708649885] [2022-07-23 13:11:13,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:11:13,043 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:11:13,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:11:13,044 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) [2022-07-23 13:11:13,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-23 13:11:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:11:13,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-23 13:11:13,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:11:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:11:13,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:11:13,200 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:11:13,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [708649885] [2022-07-23 13:11:13,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [708649885] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:11:13,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:11:13,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 13:11:13,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718201520] [2022-07-23 13:11:13,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:11:13,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 13:11:13,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:11:13,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 13:11:13,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 13:11:13,202 INFO L87 Difference]: Start difference. First operand 1494 states and 1828 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) [2022-07-23 13:11:13,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:11:13,221 INFO L93 Difference]: Finished difference Result 1434 states and 1742 transitions. [2022-07-23 13:11:13,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 13:11:13,221 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 [2022-07-23 13:11:13,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:11:13,225 INFO L225 Difference]: With dead ends: 1434 [2022-07-23 13:11:13,225 INFO L226 Difference]: Without dead ends: 1434 [2022-07-23 13:11:13,226 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 [2022-07-23 13:11:13,226 INFO L413 NwaCegarLoop]: 1239 mSDtfsCounter, 1165 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1179 SdHoareTripleChecker+Valid, 1308 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 [2022-07-23 13:11:13,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1179 Valid, 1308 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 13:11:13,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2022-07-23 13:11:13,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1434. [2022-07-23 13:11:13,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 871 states have (on average 1.9586681974741675) internal successors, (1706), 1412 states have internal predecessors, (1706), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-23 13:11:13,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 1742 transitions. [2022-07-23 13:11:13,247 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 1742 transitions. Word has length 19 [2022-07-23 13:11:13,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:11:13,247 INFO L495 AbstractCegarLoop]: Abstraction has 1434 states and 1742 transitions. [2022-07-23 13:11:13,247 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) [2022-07-23 13:11:13,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 1742 transitions. [2022-07-23 13:11:13,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-23 13:11:13,248 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:11:13,248 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] [2022-07-23 13:11:13,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-23 13:11:13,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:11:13,456 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-23 13:11:13,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:11:13,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1032548102, now seen corresponding path program 1 times [2022-07-23 13:11:13,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:11:13,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1292075438] [2022-07-23 13:11:13,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:11:13,457 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:11:13,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:11:13,458 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) [2022-07-23 13:11:13,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-23 13:11:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:11:13,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 13:11:13,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:11:13,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:11:13,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:11:13,616 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:11:13,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1292075438] [2022-07-23 13:11:13,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1292075438] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:11:13,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:11:13,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:11:13,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410381835] [2022-07-23 13:11:13,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:11:13,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 13:11:13,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:11:13,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 13:11:13,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 13:11:13,618 INFO L87 Difference]: Start difference. First operand 1434 states and 1742 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) [2022-07-23 13:11:13,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:11:13,669 INFO L93 Difference]: Finished difference Result 1406 states and 1686 transitions. [2022-07-23 13:11:13,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 13:11:13,670 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 [2022-07-23 13:11:13,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:11:13,673 INFO L225 Difference]: With dead ends: 1406 [2022-07-23 13:11:13,674 INFO L226 Difference]: Without dead ends: 1406 [2022-07-23 13:11:13,674 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 [2022-07-23 13:11:13,676 INFO L413 NwaCegarLoop]: 1194 mSDtfsCounter, 1136 mSDsluCounter, 1256 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 2450 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 [2022-07-23 13:11:13,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1150 Valid, 2450 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 13:11:13,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1406 states. [2022-07-23 13:11:13,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1406 to 1404. [2022-07-23 13:11:13,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 855 states have (on average 1.9274853801169591) internal successors, (1648), 1382 states have internal predecessors, (1648), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-23 13:11:13,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 1684 transitions. [2022-07-23 13:11:13,690 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 1684 transitions. Word has length 21 [2022-07-23 13:11:13,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:11:13,690 INFO L495 AbstractCegarLoop]: Abstraction has 1404 states and 1684 transitions. [2022-07-23 13:11:13,690 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) [2022-07-23 13:11:13,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 1684 transitions. [2022-07-23 13:11:13,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-23 13:11:13,691 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:11:13,691 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] [2022-07-23 13:11:13,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-23 13:11:13,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:11:13,899 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-23 13:11:13,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:11:13,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1673308372, now seen corresponding path program 1 times [2022-07-23 13:11:13,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:11:13,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632362996] [2022-07-23 13:11:13,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:11:13,900 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:11:13,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:11:13,901 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) [2022-07-23 13:11:13,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-23 13:11:14,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:11:14,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 13:11:14,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:11:14,043 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 [2022-07-23 13:11:14,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:11:14,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:11:14,086 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:11:14,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632362996] [2022-07-23 13:11:14,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [632362996] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:11:14,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:11:14,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:11:14,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712809685] [2022-07-23 13:11:14,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:11:14,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 13:11:14,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:11:14,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 13:11:14,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:11:14,087 INFO L87 Difference]: Start difference. First operand 1404 states and 1684 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) [2022-07-23 13:11:16,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:11:16,707 INFO L93 Difference]: Finished difference Result 2572 states and 3080 transitions. [2022-07-23 13:11:16,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 13:11:16,722 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 [2022-07-23 13:11:16,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:11:16,727 INFO L225 Difference]: With dead ends: 2572 [2022-07-23 13:11:16,727 INFO L226 Difference]: Without dead ends: 2572 [2022-07-23 13:11:16,727 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 [2022-07-23 13:11:16,728 INFO L413 NwaCegarLoop]: 1149 mSDtfsCounter, 2421 mSDsluCounter, 1588 mSDsCounter, 0 mSdLazyCounter, 2363 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2424 SdHoareTripleChecker+Valid, 2737 SdHoareTripleChecker+Invalid, 2382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-23 13:11:16,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2424 Valid, 2737 Invalid, 2382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2363 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-23 13:11:16,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2022-07-23 13:11:16,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 1400. [2022-07-23 13:11:16,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 855 states have (on average 1.9181286549707601) internal successors, (1640), 1378 states have internal predecessors, (1640), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-23 13:11:16,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 1676 transitions. [2022-07-23 13:11:16,743 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 1676 transitions. Word has length 35 [2022-07-23 13:11:16,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:11:16,744 INFO L495 AbstractCegarLoop]: Abstraction has 1400 states and 1676 transitions. [2022-07-23 13:11:16,744 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) [2022-07-23 13:11:16,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 1676 transitions. [2022-07-23 13:11:16,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-23 13:11:16,744 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:11:16,745 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] [2022-07-23 13:11:16,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-23 13:11:16,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:11:16,953 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-23 13:11:16,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:11:16,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1673308373, now seen corresponding path program 1 times [2022-07-23 13:11:16,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:11:16,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617672811] [2022-07-23 13:11:16,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:11:16,954 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:11:16,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:11:16,956 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) [2022-07-23 13:11:16,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-23 13:11:17,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:11:17,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 13:11:17,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:11:17,132 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 [2022-07-23 13:11:17,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:11:17,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:11:17,264 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:11:17,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617672811] [2022-07-23 13:11:17,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617672811] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:11:17,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:11:17,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:11:17,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639244249] [2022-07-23 13:11:17,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:11:17,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 13:11:17,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:11:17,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 13:11:17,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:11:17,265 INFO L87 Difference]: Start difference. First operand 1400 states and 1676 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) [2022-07-23 13:11:20,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:11:20,434 INFO L93 Difference]: Finished difference Result 2214 states and 2659 transitions. [2022-07-23 13:11:20,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 13:11:20,434 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 [2022-07-23 13:11:20,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:11:20,439 INFO L225 Difference]: With dead ends: 2214 [2022-07-23 13:11:20,439 INFO L226 Difference]: Without dead ends: 2214 [2022-07-23 13:11:20,440 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 [2022-07-23 13:11:20,441 INFO L413 NwaCegarLoop]: 1548 mSDtfsCounter, 2194 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 2142 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2194 SdHoareTripleChecker+Valid, 3317 SdHoareTripleChecker+Invalid, 2164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-23 13:11:20,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2194 Valid, 3317 Invalid, 2164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2142 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-23 13:11:20,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2022-07-23 13:11:20,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 1396. [2022-07-23 13:11:20,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1396 states, 855 states have (on average 1.9087719298245613) internal successors, (1632), 1374 states have internal predecessors, (1632), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-23 13:11:20,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 1668 transitions. [2022-07-23 13:11:20,481 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 1668 transitions. Word has length 35 [2022-07-23 13:11:20,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:11:20,482 INFO L495 AbstractCegarLoop]: Abstraction has 1396 states and 1668 transitions. [2022-07-23 13:11:20,482 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) [2022-07-23 13:11:20,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 1668 transitions. [2022-07-23 13:11:20,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-23 13:11:20,486 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:11:20,486 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] [2022-07-23 13:11:20,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-23 13:11:20,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:11:20,696 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-23 13:11:20,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:11:20,696 INFO L85 PathProgramCache]: Analyzing trace with hash -2063645645, now seen corresponding path program 1 times [2022-07-23 13:11:20,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:11:20,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88324302] [2022-07-23 13:11:20,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:11:20,697 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:11:20,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:11:20,698 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) [2022-07-23 13:11:20,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-23 13:11:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:11:20,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 13:11:20,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:11:20,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:11:20,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:11:20,949 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:11:20,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88324302] [2022-07-23 13:11:20,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88324302] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:11:20,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:11:20,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:11:20,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188231082] [2022-07-23 13:11:20,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:11:20,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 13:11:20,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:11:20,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 13:11:20,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 13:11:20,951 INFO L87 Difference]: Start difference. First operand 1396 states and 1668 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) [2022-07-23 13:11:20,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:11:20,985 INFO L93 Difference]: Finished difference Result 1384 states and 1648 transitions. [2022-07-23 13:11:20,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 13:11:20,986 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 [2022-07-23 13:11:20,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:11:20,989 INFO L225 Difference]: With dead ends: 1384 [2022-07-23 13:11:20,989 INFO L226 Difference]: Without dead ends: 1384 [2022-07-23 13:11:20,989 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 [2022-07-23 13:11:20,990 INFO L413 NwaCegarLoop]: 1188 mSDtfsCounter, 1112 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 2428 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 [2022-07-23 13:11:20,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1126 Valid, 2428 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 13:11:20,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2022-07-23 13:11:20,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1384. [2022-07-23 13:11:21,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 843 states have (on average 1.9122182680901543) internal successors, (1612), 1362 states have internal predecessors, (1612), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-23 13:11:21,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 1648 transitions. [2022-07-23 13:11:21,002 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 1648 transitions. Word has length 54 [2022-07-23 13:11:21,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:11:21,003 INFO L495 AbstractCegarLoop]: Abstraction has 1384 states and 1648 transitions. [2022-07-23 13:11:21,003 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) [2022-07-23 13:11:21,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 1648 transitions. [2022-07-23 13:11:21,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-23 13:11:21,003 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:11:21,004 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] [2022-07-23 13:11:21,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-23 13:11:21,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:11:21,213 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-23 13:11:21,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:11:21,213 INFO L85 PathProgramCache]: Analyzing trace with hash -202859289, now seen corresponding path program 1 times [2022-07-23 13:11:21,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:11:21,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39978085] [2022-07-23 13:11:21,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:11:21,214 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:11:21,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:11:21,215 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) [2022-07-23 13:11:21,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-23 13:11:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:11:21,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 13:11:21,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:11:21,545 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-23 13:11:21,545 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 [2022-07-23 13:11:21,594 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-23 13:11:21,594 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 [2022-07-23 13:11:21,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:11:21,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:11:21,866 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:11:21,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39978085] [2022-07-23 13:11:21,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39978085] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:11:21,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:11:21,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:11:21,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387791910] [2022-07-23 13:11:21,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:11:21,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 13:11:21,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:11:21,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 13:11:21,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-23 13:11:21,868 INFO L87 Difference]: Start difference. First operand 1384 states and 1648 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) [2022-07-23 13:11:21,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:11:21,997 INFO L93 Difference]: Finished difference Result 1394 states and 1661 transitions. [2022-07-23 13:11:21,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 13:11:21,998 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 [2022-07-23 13:11:21,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:11:22,001 INFO L225 Difference]: With dead ends: 1394 [2022-07-23 13:11:22,001 INFO L226 Difference]: Without dead ends: 1394 [2022-07-23 13:11:22,001 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 [2022-07-23 13:11:22,002 INFO L413 NwaCegarLoop]: 1170 mSDtfsCounter, 116 mSDsluCounter, 1287 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 2457 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 556 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 13:11:22,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 2457 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 556 Unchecked, 0.1s Time] [2022-07-23 13:11:22,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2022-07-23 13:11:22,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1389. [2022-07-23 13:11:22,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1389 states, 847 states have (on average 1.9090909090909092) internal successors, (1617), 1366 states have internal predecessors, (1617), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-23 13:11:22,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 1655 transitions. [2022-07-23 13:11:22,014 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 1655 transitions. Word has length 62 [2022-07-23 13:11:22,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:11:22,015 INFO L495 AbstractCegarLoop]: Abstraction has 1389 states and 1655 transitions. [2022-07-23 13:11:22,015 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) [2022-07-23 13:11:22,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 1655 transitions. [2022-07-23 13:11:22,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-23 13:11:22,015 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:11:22,016 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] [2022-07-23 13:11:22,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-23 13:11:22,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:11:22,227 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-23 13:11:22,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:11:22,228 INFO L85 PathProgramCache]: Analyzing trace with hash -202859288, now seen corresponding path program 1 times [2022-07-23 13:11:22,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:11:22,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [547898510] [2022-07-23 13:11:22,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:11:22,229 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:11:22,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:11:22,230 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) [2022-07-23 13:11:22,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-23 13:11:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:11:22,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-23 13:11:22,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:11:22,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 13:11:22,555 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 [2022-07-23 13:11:22,603 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 13:11:22,603 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 [2022-07-23 13:11:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:11:22,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:11:22,948 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:11:22,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [547898510] [2022-07-23 13:11:22,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [547898510] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:11:22,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:11:22,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:11:22,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733921601] [2022-07-23 13:11:22,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:11:22,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 13:11:22,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:11:22,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 13:11:22,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-23 13:11:22,949 INFO L87 Difference]: Start difference. First operand 1389 states and 1655 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) [2022-07-23 13:11:24,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:11:24,971 INFO L93 Difference]: Finished difference Result 1390 states and 1655 transitions. [2022-07-23 13:11:24,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 13:11:24,972 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 [2022-07-23 13:11:24,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:11:24,975 INFO L225 Difference]: With dead ends: 1390 [2022-07-23 13:11:24,975 INFO L226 Difference]: Without dead ends: 1390 [2022-07-23 13:11:24,975 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 [2022-07-23 13:11:24,975 INFO L413 NwaCegarLoop]: 1170 mSDtfsCounter, 111 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 2402 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-23 13:11:24,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 2402 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-23 13:11:24,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2022-07-23 13:11:24,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1389. [2022-07-23 13:11:24,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1389 states, 847 states have (on average 1.9079102715466352) internal successors, (1616), 1366 states have internal predecessors, (1616), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-23 13:11:24,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 1654 transitions. [2022-07-23 13:11:24,987 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 1654 transitions. Word has length 62 [2022-07-23 13:11:24,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:11:24,987 INFO L495 AbstractCegarLoop]: Abstraction has 1389 states and 1654 transitions. [2022-07-23 13:11:24,987 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) [2022-07-23 13:11:24,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 1654 transitions. [2022-07-23 13:11:24,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-23 13:11:24,988 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:11:24,988 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] [2022-07-23 13:11:25,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-07-23 13:11:25,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:11:25,198 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-23 13:11:25,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:11:25,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1136013504, now seen corresponding path program 1 times [2022-07-23 13:11:25,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:11:25,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1179287483] [2022-07-23 13:11:25,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:11:25,199 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:11:25,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:11:25,200 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) [2022-07-23 13:11:25,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-23 13:11:25,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:11:25,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 13:11:25,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:11:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:11:25,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:11:25,457 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:11:25,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1179287483] [2022-07-23 13:11:25,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1179287483] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:11:25,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:11:25,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 13:11:25,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396201357] [2022-07-23 13:11:25,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:11:25,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 13:11:25,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:11:25,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 13:11:25,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 13:11:25,459 INFO L87 Difference]: Start difference. First operand 1389 states and 1654 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) [2022-07-23 13:11:25,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:11:25,527 INFO L93 Difference]: Finished difference Result 1403 states and 1668 transitions. [2022-07-23 13:11:25,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 13:11:25,528 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 [2022-07-23 13:11:25,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:11:25,530 INFO L225 Difference]: With dead ends: 1403 [2022-07-23 13:11:25,530 INFO L226 Difference]: Without dead ends: 1403 [2022-07-23 13:11:25,531 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 [2022-07-23 13:11:25,531 INFO L413 NwaCegarLoop]: 1186 mSDtfsCounter, 19 mSDsluCounter, 4732 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 5918 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 13:11:25,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 5918 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 13:11:25,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2022-07-23 13:11:25,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1401. [2022-07-23 13:11:25,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 856 states have (on average 1.9018691588785046) internal successors, (1628), 1376 states have internal predecessors, (1628), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-23 13:11:25,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 1668 transitions. [2022-07-23 13:11:25,547 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 1668 transitions. Word has length 68 [2022-07-23 13:11:25,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:11:25,547 INFO L495 AbstractCegarLoop]: Abstraction has 1401 states and 1668 transitions. [2022-07-23 13:11:25,547 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) [2022-07-23 13:11:25,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 1668 transitions. [2022-07-23 13:11:25,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-23 13:11:25,548 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:11:25,548 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] [2022-07-23 13:11:25,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-23 13:11:25,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:11:25,758 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-23 13:11:25,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:11:25,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1078181117, now seen corresponding path program 1 times [2022-07-23 13:11:25,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:11:25,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [201236639] [2022-07-23 13:11:25,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:11:25,759 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:11:25,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:11:25,760 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) [2022-07-23 13:11:25,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-23 13:11:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:11:26,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 13:11:26,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:11:26,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:11:26,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:11:26,106 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:11:26,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [201236639] [2022-07-23 13:11:26,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [201236639] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:11:26,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:11:26,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 13:11:26,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804475464] [2022-07-23 13:11:26,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:11:26,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 13:11:26,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:11:26,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 13:11:26,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-23 13:11:26,107 INFO L87 Difference]: Start difference. First operand 1401 states and 1668 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) [2022-07-23 13:11:26,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:11:26,246 INFO L93 Difference]: Finished difference Result 1407 states and 1675 transitions. [2022-07-23 13:11:26,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 13:11:26,247 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 [2022-07-23 13:11:26,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:11:26,250 INFO L225 Difference]: With dead ends: 1407 [2022-07-23 13:11:26,250 INFO L226 Difference]: Without dead ends: 1407 [2022-07-23 13:11:26,250 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 [2022-07-23 13:11:26,251 INFO L413 NwaCegarLoop]: 1185 mSDtfsCounter, 23 mSDsluCounter, 4590 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 5775 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 13:11:26,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 5775 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 13:11:26,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2022-07-23 13:11:26,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1404. [2022-07-23 13:11:26,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 858 states have (on average 1.8997668997668997) internal successors, (1630), 1378 states have internal predecessors, (1630), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-07-23 13:11:26,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 1671 transitions. [2022-07-23 13:11:26,264 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 1671 transitions. Word has length 68 [2022-07-23 13:11:26,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:11:26,265 INFO L495 AbstractCegarLoop]: Abstraction has 1404 states and 1671 transitions. [2022-07-23 13:11:26,265 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) [2022-07-23 13:11:26,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 1671 transitions. [2022-07-23 13:11:26,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-23 13:11:26,265 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:11:26,266 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] [2022-07-23 13:11:26,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-23 13:11:26,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:11:26,476 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-23 13:11:26,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:11:26,477 INFO L85 PathProgramCache]: Analyzing trace with hash 396897840, now seen corresponding path program 1 times [2022-07-23 13:11:26,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:11:26,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [177865417] [2022-07-23 13:11:26,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:11:26,477 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:11:26,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:11:26,479 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) [2022-07-23 13:11:26,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-23 13:11:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:11:26,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 13:11:26,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:11:26,778 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 [2022-07-23 13:11:26,868 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-23 13:11:26,869 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 [2022-07-23 13:11:26,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:11:26,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:11:26,875 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:11:26,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [177865417] [2022-07-23 13:11:26,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [177865417] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:11:26,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:11:26,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 13:11:26,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716101572] [2022-07-23 13:11:26,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:11:26,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 13:11:26,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:11:26,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 13:11:26,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 13:11:26,876 INFO L87 Difference]: Start difference. First operand 1404 states and 1671 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) [2022-07-23 13:11:29,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:11:29,783 INFO L93 Difference]: Finished difference Result 2560 states and 3059 transitions. [2022-07-23 13:11:29,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 13:11:29,784 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 [2022-07-23 13:11:29,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:11:29,787 INFO L225 Difference]: With dead ends: 2560 [2022-07-23 13:11:29,787 INFO L226 Difference]: Without dead ends: 2560 [2022-07-23 13:11:29,787 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 [2022-07-23 13:11:29,788 INFO L413 NwaCegarLoop]: 1114 mSDtfsCounter, 1622 mSDsluCounter, 2883 mSDsCounter, 0 mSdLazyCounter, 2727 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1628 SdHoareTripleChecker+Valid, 3997 SdHoareTripleChecker+Invalid, 3875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1127 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-23 13:11:29,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1628 Valid, 3997 Invalid, 3875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2727 Invalid, 0 Unknown, 1127 Unchecked, 2.9s Time] [2022-07-23 13:11:29,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2022-07-23 13:11:29,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 1403. [2022-07-23 13:11:29,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1403 states, 858 states have (on average 1.8986013986013985) internal successors, (1629), 1377 states have internal predecessors, (1629), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-07-23 13:11:29,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 1670 transitions. [2022-07-23 13:11:29,804 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 1670 transitions. Word has length 73 [2022-07-23 13:11:29,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:11:29,804 INFO L495 AbstractCegarLoop]: Abstraction has 1403 states and 1670 transitions. [2022-07-23 13:11:29,805 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) [2022-07-23 13:11:29,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 1670 transitions. [2022-07-23 13:11:29,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-23 13:11:29,805 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:11:29,805 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] [2022-07-23 13:11:29,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-23 13:11:30,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:11:30,016 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-23 13:11:30,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:11:30,016 INFO L85 PathProgramCache]: Analyzing trace with hash 396897841, now seen corresponding path program 1 times [2022-07-23 13:11:30,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:11:30,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73814849] [2022-07-23 13:11:30,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:11:30,017 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:11:30,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:11:30,018 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) [2022-07-23 13:11:30,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-23 13:11:30,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:11:30,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-23 13:11:30,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:11:30,388 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 [2022-07-23 13:11:30,392 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 [2022-07-23 13:11:30,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 13:11:30,697 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 [2022-07-23 13:11:30,703 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 13:11:30,704 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 [2022-07-23 13:11:30,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:11:30,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:11:30,717 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:11:30,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73814849] [2022-07-23 13:11:30,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73814849] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:11:30,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:11:30,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 13:11:30,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287529224] [2022-07-23 13:11:30,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:11:30,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 13:11:30,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:11:30,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 13:11:30,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-23 13:11:30,719 INFO L87 Difference]: Start difference. First operand 1403 states and 1670 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) [2022-07-23 13:11:36,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:11:36,027 INFO L93 Difference]: Finished difference Result 2630 states and 3192 transitions. [2022-07-23 13:11:36,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 13:11:36,027 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 [2022-07-23 13:11:36,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:11:36,031 INFO L225 Difference]: With dead ends: 2630 [2022-07-23 13:11:36,031 INFO L226 Difference]: Without dead ends: 2630 [2022-07-23 13:11:36,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-23 13:11:36,031 INFO L413 NwaCegarLoop]: 1319 mSDtfsCounter, 1836 mSDsluCounter, 2843 mSDsCounter, 0 mSdLazyCounter, 4881 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1842 SdHoareTripleChecker+Valid, 4162 SdHoareTripleChecker+Invalid, 6220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 4881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1309 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-07-23 13:11:36,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1842 Valid, 4162 Invalid, 6220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 4881 Invalid, 0 Unknown, 1309 Unchecked, 5.2s Time] [2022-07-23 13:11:36,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2630 states. [2022-07-23 13:11:36,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2630 to 1397. [2022-07-23 13:11:36,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 860 states have (on average 1.8872093023255814) internal successors, (1623), 1371 states have internal predecessors, (1623), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-07-23 13:11:36,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 1664 transitions. [2022-07-23 13:11:36,047 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 1664 transitions. Word has length 73 [2022-07-23 13:11:36,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:11:36,047 INFO L495 AbstractCegarLoop]: Abstraction has 1397 states and 1664 transitions. [2022-07-23 13:11:36,048 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) [2022-07-23 13:11:36,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 1664 transitions. [2022-07-23 13:11:36,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-23 13:11:36,048 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:11:36,048 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] [2022-07-23 13:11:36,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-23 13:11:36,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:11:36,260 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting alt_bzeroErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-23 13:11:36,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:11:36,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1622258381, now seen corresponding path program 1 times [2022-07-23 13:11:36,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:11:36,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936172808] [2022-07-23 13:11:36,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:11:36,261 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:11:36,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:11:36,262 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) [2022-07-23 13:11:36,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-23 13:11:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:11:36,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 13:11:36,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:11:36,515 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 [2022-07-23 13:11:36,528 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 [2022-07-23 13:11:36,543 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 [2022-07-23 13:11:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:11:36,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:11:36,564 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:11:36,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936172808] [2022-07-23 13:11:36,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936172808] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:11:36,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:11:36,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-23 13:11:36,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981888156] [2022-07-23 13:11:36,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:11:36,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 13:11:36,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:11:36,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 13:11:36,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-23 13:11:36,572 INFO L87 Difference]: Start difference. First operand 1397 states and 1664 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) [2022-07-23 13:11:39,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:11:39,387 INFO L93 Difference]: Finished difference Result 1405 states and 1672 transitions. [2022-07-23 13:11:39,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 13:11:39,387 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 [2022-07-23 13:11:39,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:11:39,389 INFO L225 Difference]: With dead ends: 1405 [2022-07-23 13:11:39,389 INFO L226 Difference]: Without dead ends: 1405 [2022-07-23 13:11:39,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-23 13:11:39,390 INFO L413 NwaCegarLoop]: 1171 mSDtfsCounter, 23 mSDsluCounter, 3760 mSDsCounter, 0 mSdLazyCounter, 3317 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 4931 SdHoareTripleChecker+Invalid, 3319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-23 13:11:39,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 4931 Invalid, 3319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3317 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-23 13:11:39,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2022-07-23 13:11:39,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1404. [2022-07-23 13:11:39,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 866 states have (on average 1.8833718244803694) internal successors, (1631), 1377 states have internal predecessors, (1631), 20 states have call successors, (20), 8 states have call predecessors, (20), 8 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-07-23 13:11:39,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 1672 transitions. [2022-07-23 13:11:39,402 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 1672 transitions. Word has length 80 [2022-07-23 13:11:39,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:11:39,403 INFO L495 AbstractCegarLoop]: Abstraction has 1404 states and 1672 transitions. [2022-07-23 13:11:39,403 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) [2022-07-23 13:11:39,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 1672 transitions. [2022-07-23 13:11:39,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-23 13:11:39,404 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:11:39,404 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] [2022-07-23 13:11:39,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-23 13:11:39,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:11:39,626 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting alt_bzeroErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-23 13:11:39,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:11:39,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1249597809, now seen corresponding path program 1 times [2022-07-23 13:11:39,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:11:39,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1811128802] [2022-07-23 13:11:39,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:11:39,627 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:11:39,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:11:39,628 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) [2022-07-23 13:11:39,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-23 13:11:39,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:11:39,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-23 13:11:39,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:11:39,914 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 [2022-07-23 13:11:39,938 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 [2022-07-23 13:11:39,945 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 [2022-07-23 13:11:39,973 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 [2022-07-23 13:11:39,976 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 [2022-07-23 13:11:40,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:11:40,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:11:40,048 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:11:40,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1811128802] [2022-07-23 13:11:40,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1811128802] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:11:40,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:11:40,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-23 13:11:40,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062794513] [2022-07-23 13:11:40,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:11:40,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 13:11:40,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:11:40,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 13:11:40,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-23 13:11:40,049 INFO L87 Difference]: Start difference. First operand 1404 states and 1672 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) [2022-07-23 13:11:43,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:11:43,953 INFO L93 Difference]: Finished difference Result 1404 states and 1671 transitions. [2022-07-23 13:11:43,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 13:11:43,953 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 [2022-07-23 13:11:43,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:11:43,955 INFO L225 Difference]: With dead ends: 1404 [2022-07-23 13:11:43,955 INFO L226 Difference]: Without dead ends: 1404 [2022-07-23 13:11:43,956 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 [2022-07-23 13:11:43,956 INFO L413 NwaCegarLoop]: 1166 mSDtfsCounter, 19 mSDsluCounter, 4783 mSDsCounter, 0 mSdLazyCounter, 3477 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 5949 SdHoareTripleChecker+Invalid, 3478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-07-23 13:11:43,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 5949 Invalid, 3478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3477 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-07-23 13:11:43,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-07-23 13:11:43,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1404. [2022-07-23 13:11:43,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 866 states have (on average 1.882217090069284) internal successors, (1630), 1377 states have internal predecessors, (1630), 20 states have call successors, (20), 8 states have call predecessors, (20), 8 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-07-23 13:11:43,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 1671 transitions. [2022-07-23 13:11:43,967 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 1671 transitions. Word has length 81 [2022-07-23 13:11:43,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:11:43,968 INFO L495 AbstractCegarLoop]: Abstraction has 1404 states and 1671 transitions. [2022-07-23 13:11:43,968 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) [2022-07-23 13:11:43,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 1671 transitions. [2022-07-23 13:11:43,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-23 13:11:43,968 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:11:43,968 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] [2022-07-23 13:11:43,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-23 13:11:44,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:11:44,179 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-23 13:11:44,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:11:44,180 INFO L85 PathProgramCache]: Analyzing trace with hash -63374884, now seen corresponding path program 1 times [2022-07-23 13:11:44,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:11:44,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81290791] [2022-07-23 13:11:44,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:11:44,181 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:11:44,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:11:44,182 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) [2022-07-23 13:11:44,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-23 13:11:44,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:11:44,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 13:11:44,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:11:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:11:44,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:11:44,506 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:11:44,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81290791] [2022-07-23 13:11:44,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81290791] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:11:44,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:11:44,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 13:11:44,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35612640] [2022-07-23 13:11:44,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:11:44,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 13:11:44,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:11:44,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 13:11:44,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:11:44,507 INFO L87 Difference]: Start difference. First operand 1404 states and 1671 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) [2022-07-23 13:11:44,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:11:44,551 INFO L93 Difference]: Finished difference Result 1412 states and 1680 transitions. [2022-07-23 13:11:44,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 13:11:44,552 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 [2022-07-23 13:11:44,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:11:44,554 INFO L225 Difference]: With dead ends: 1412 [2022-07-23 13:11:44,554 INFO L226 Difference]: Without dead ends: 1409 [2022-07-23 13:11:44,554 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 [2022-07-23 13:11:44,555 INFO L413 NwaCegarLoop]: 1174 mSDtfsCounter, 13 mSDsluCounter, 2340 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3514 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 13:11:44,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 3514 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 13:11:44,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2022-07-23 13:11:44,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 1409. [2022-07-23 13:11:44,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 870 states have (on average 1.8793103448275863) internal successors, (1635), 1382 states have internal predecessors, (1635), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-23 13:11:44,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 1677 transitions. [2022-07-23 13:11:44,566 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 1677 transitions. Word has length 88 [2022-07-23 13:11:44,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:11:44,567 INFO L495 AbstractCegarLoop]: Abstraction has 1409 states and 1677 transitions. [2022-07-23 13:11:44,567 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) [2022-07-23 13:11:44,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 1677 transitions. [2022-07-23 13:11:44,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-23 13:11:44,567 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:11:44,567 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] [2022-07-23 13:11:44,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-07-23 13:11:44,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:11:44,778 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-23 13:11:44,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:11:44,779 INFO L85 PathProgramCache]: Analyzing trace with hash -407790698, now seen corresponding path program 1 times [2022-07-23 13:11:44,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:11:44,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196595508] [2022-07-23 13:11:44,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:11:44,779 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:11:44,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:11:44,781 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) [2022-07-23 13:11:44,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-23 13:11:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:11:45,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 13:11:45,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:11:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:11:45,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:11:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:11:45,191 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:11:45,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196595508] [2022-07-23 13:11:45,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196595508] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:11:45,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 13:11:45,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-23 13:11:45,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295953170] [2022-07-23 13:11:45,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 13:11:45,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 13:11:45,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:11:45,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 13:11:45,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-23 13:11:45,193 INFO L87 Difference]: Start difference. First operand 1409 states and 1677 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) [2022-07-23 13:11:45,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:11:45,351 INFO L93 Difference]: Finished difference Result 1422 states and 1692 transitions. [2022-07-23 13:11:45,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 13:11:45,352 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 [2022-07-23 13:11:45,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:11:45,354 INFO L225 Difference]: With dead ends: 1422 [2022-07-23 13:11:45,354 INFO L226 Difference]: Without dead ends: 1416 [2022-07-23 13:11:45,354 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 [2022-07-23 13:11:45,354 INFO L413 NwaCegarLoop]: 1177 mSDtfsCounter, 44 mSDsluCounter, 3523 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 4700 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 13:11:45,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 4700 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 13:11:45,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2022-07-23 13:11:45,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 1413. [2022-07-23 13:11:45,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 874 states have (on average 1.8764302059496567) internal successors, (1640), 1386 states have internal predecessors, (1640), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-23 13:11:45,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 1682 transitions. [2022-07-23 13:11:45,365 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 1682 transitions. Word has length 89 [2022-07-23 13:11:45,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:11:45,365 INFO L495 AbstractCegarLoop]: Abstraction has 1413 states and 1682 transitions. [2022-07-23 13:11:45,365 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) [2022-07-23 13:11:45,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 1682 transitions. [2022-07-23 13:11:45,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-23 13:11:45,366 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:11:45,366 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] [2022-07-23 13:11:45,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-23 13:11:45,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:11:45,580 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-23 13:11:45,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:11:45,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1714460764, now seen corresponding path program 2 times [2022-07-23 13:11:45,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:11:45,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1751485116] [2022-07-23 13:11:45,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 13:11:45,581 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:11:45,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:11:45,582 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) [2022-07-23 13:11:45,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-23 13:11:46,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 13:11:46,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:11:46,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-23 13:11:46,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:11:46,145 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:11:46,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:11:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:11:46,355 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:11:46,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1751485116] [2022-07-23 13:11:46,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1751485116] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:11:46,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 13:11:46,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-23 13:11:46,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902035949] [2022-07-23 13:11:46,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 13:11:46,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-23 13:11:46,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:11:46,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-23 13:11:46,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-07-23 13:11:46,356 INFO L87 Difference]: Start difference. First operand 1413 states and 1682 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) [2022-07-23 13:11:46,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:11:46,885 INFO L93 Difference]: Finished difference Result 1440 states and 1716 transitions. [2022-07-23 13:11:46,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-23 13:11:46,885 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 [2022-07-23 13:11:46,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:11:46,887 INFO L225 Difference]: With dead ends: 1440 [2022-07-23 13:11:46,887 INFO L226 Difference]: Without dead ends: 1434 [2022-07-23 13:11:46,888 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 [2022-07-23 13:11:46,888 INFO L413 NwaCegarLoop]: 1183 mSDtfsCounter, 79 mSDsluCounter, 8233 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 9416 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 13:11:46,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 9416 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 13:11:46,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2022-07-23 13:11:46,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1422. [2022-07-23 13:11:46,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 883 states have (on average 1.870894677236693) internal successors, (1652), 1395 states have internal predecessors, (1652), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-23 13:11:46,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 1694 transitions. [2022-07-23 13:11:46,934 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 1694 transitions. Word has length 92 [2022-07-23 13:11:46,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:11:46,934 INFO L495 AbstractCegarLoop]: Abstraction has 1422 states and 1694 transitions. [2022-07-23 13:11:46,935 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) [2022-07-23 13:11:46,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 1694 transitions. [2022-07-23 13:11:46,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-23 13:11:46,935 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:11:46,936 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] [2022-07-23 13:11:46,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-23 13:11:47,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:11:47,147 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-23 13:11:47,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:11:47,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1774326244, now seen corresponding path program 3 times [2022-07-23 13:11:47,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:11:47,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375892189] [2022-07-23 13:11:47,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 13:11:47,149 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:11:47,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:11:47,150 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) [2022-07-23 13:11:47,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-23 13:11:47,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-23 13:11:47,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:11:47,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-23 13:11:47,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:11:48,183 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:11:48,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:11:48,853 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:11:48,854 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:11:48,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375892189] [2022-07-23 13:11:48,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375892189] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:11:48,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 13:11:48,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-07-23 13:11:48,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559490518] [2022-07-23 13:11:48,855 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 13:11:48,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-23 13:11:48,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:11:48,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-23 13:11:48,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-07-23 13:11:48,856 INFO L87 Difference]: Start difference. First operand 1422 states and 1694 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) [2022-07-23 13:11:51,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:11:51,607 INFO L93 Difference]: Finished difference Result 1476 states and 1768 transitions. [2022-07-23 13:11:51,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-23 13:11:51,607 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 [2022-07-23 13:11:51,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:11:51,609 INFO L225 Difference]: With dead ends: 1476 [2022-07-23 13:11:51,610 INFO L226 Difference]: Without dead ends: 1467 [2022-07-23 13:11:51,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=924, Invalid=1832, Unknown=0, NotChecked=0, Total=2756 [2022-07-23 13:11:51,611 INFO L413 NwaCegarLoop]: 1195 mSDtfsCounter, 183 mSDsluCounter, 20109 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 21304 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-23 13:11:51,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 21304 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-23 13:11:51,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2022-07-23 13:11:51,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1440. [2022-07-23 13:11:51,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 901 states have (on average 1.8590455049944505) internal successors, (1675), 1413 states have internal predecessors, (1675), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-23 13:11:51,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 1717 transitions. [2022-07-23 13:11:51,622 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 1717 transitions. Word has length 98 [2022-07-23 13:11:51,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:11:51,622 INFO L495 AbstractCegarLoop]: Abstraction has 1440 states and 1717 transitions. [2022-07-23 13:11:51,622 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) [2022-07-23 13:11:51,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 1717 transitions. [2022-07-23 13:11:51,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-23 13:11:51,623 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:11:51,623 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] [2022-07-23 13:11:51,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-07-23 13:11:51,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:11:51,837 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-23 13:11:51,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:11:51,837 INFO L85 PathProgramCache]: Analyzing trace with hash -824268388, now seen corresponding path program 4 times [2022-07-23 13:11:51,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:11:51,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [427550177] [2022-07-23 13:11:51,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 13:11:51,838 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:11:51,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:11:51,839 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) [2022-07-23 13:11:51,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-23 13:11:52,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 13:11:52,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:11:52,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-23 13:11:52,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:11:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:11:52,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:11:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:11:54,229 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:11:54,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [427550177] [2022-07-23 13:11:54,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [427550177] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:11:54,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 13:11:54,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-07-23 13:11:54,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720445704] [2022-07-23 13:11:54,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 13:11:54,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-23 13:11:54,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:11:54,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-23 13:11:54,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=1927, Unknown=0, NotChecked=0, Total=2652 [2022-07-23 13:11:54,231 INFO L87 Difference]: Start difference. First operand 1440 states and 1717 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) [2022-07-23 13:12:02,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:12:02,295 INFO L93 Difference]: Finished difference Result 1543 states and 1852 transitions. [2022-07-23 13:12:02,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-23 13:12:02,296 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 [2022-07-23 13:12:02,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:12:02,299 INFO L225 Difference]: With dead ends: 1543 [2022-07-23 13:12:02,299 INFO L226 Difference]: Without dead ends: 1537 [2022-07-23 13:12:02,301 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 [2022-07-23 13:12:02,302 INFO L413 NwaCegarLoop]: 1217 mSDtfsCounter, 425 mSDsluCounter, 30240 mSDsCounter, 0 mSdLazyCounter, 2449 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 31457 SdHoareTripleChecker+Invalid, 2904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 2449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-23 13:12:02,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 31457 Invalid, 2904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 2449 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-23 13:12:02,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2022-07-23 13:12:02,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1474. [2022-07-23 13:12:02,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 935 states have (on average 1.8406417112299465) internal successors, (1721), 1447 states have internal predecessors, (1721), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-23 13:12:02,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 1763 transitions. [2022-07-23 13:12:02,316 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 1763 transitions. Word has length 110 [2022-07-23 13:12:02,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:12:02,316 INFO L495 AbstractCegarLoop]: Abstraction has 1474 states and 1763 transitions. [2022-07-23 13:12:02,316 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) [2022-07-23 13:12:02,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 1763 transitions. [2022-07-23 13:12:02,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-23 13:12:02,317 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:12:02,317 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] [2022-07-23 13:12:02,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-23 13:12:02,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:12:02,531 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-23 13:12:02,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:12:02,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1958349148, now seen corresponding path program 5 times [2022-07-23 13:12:02,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:12:02,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2037614536] [2022-07-23 13:12:02,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 13:12:02,532 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:12:02,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:12:02,533 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) [2022-07-23 13:12:02,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-23 13:12:03,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-07-23 13:12:03,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:12:03,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-23 13:12:03,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:12:03,983 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 [2022-07-23 13:12:04,081 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 13:12:04,082 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 [2022-07-23 13:12:04,102 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 [2022-07-23 13:12:04,176 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 [2022-07-23 13:12:05,605 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 13:12:05,606 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 [2022-07-23 13:12:05,635 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 [2022-07-23 13:12:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2022-07-23 13:12:05,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:12:05,917 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2663 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_2663) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))))) is different from false [2022-07-23 13:12:05,919 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:12:05,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2037614536] [2022-07-23 13:12:05,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2037614536] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:12:05,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1987392027] [2022-07-23 13:12:05,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 13:12:05,919 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 13:12:05,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 13:12:05,921 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) [2022-07-23 13:12:05,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-07-23 13:13:33,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-07-23 13:13:33,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:13:33,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-23 13:13:33,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:13:33,992 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 [2022-07-23 13:13:34,066 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 13:13:34,066 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 [2022-07-23 13:13:34,077 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 [2022-07-23 13:13:34,108 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 [2022-07-23 13:13:35,413 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 13:13:35,413 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 [2022-07-23 13:13:35,440 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 [2022-07-23 13:13:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2022-07-23 13:13:35,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:13:35,642 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3142 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_3142) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))))) is different from false [2022-07-23 13:13:35,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1987392027] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:13:35,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 13:13:35,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2022-07-23 13:13:35,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712310869] [2022-07-23 13:13:35,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 13:13:35,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 13:13:35,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:13:35,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 13:13:35,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=191, Unknown=15, NotChecked=58, Total=306 [2022-07-23 13:13:35,644 INFO L87 Difference]: Start difference. First operand 1474 states and 1763 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) [2022-07-23 13:13:41,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:13:41,334 INFO L93 Difference]: Finished difference Result 2790 states and 3320 transitions. [2022-07-23 13:13:41,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-23 13:13:41,335 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 [2022-07-23 13:13:41,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:13:41,338 INFO L225 Difference]: With dead ends: 2790 [2022-07-23 13:13:41,339 INFO L226 Difference]: Without dead ends: 2790 [2022-07-23 13:13:41,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 166 SyntacticMatches, 89 SemanticMatches, 24 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=95, Invalid=441, Unknown=24, NotChecked=90, Total=650 [2022-07-23 13:13:41,339 INFO L413 NwaCegarLoop]: 1167 mSDtfsCounter, 1803 mSDsluCounter, 9406 mSDsCounter, 0 mSdLazyCounter, 6051 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1808 SdHoareTripleChecker+Valid, 10573 SdHoareTripleChecker+Invalid, 13108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 6051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7023 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-07-23 13:13:41,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1808 Valid, 10573 Invalid, 13108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 6051 Invalid, 0 Unknown, 7023 Unchecked, 5.4s Time] [2022-07-23 13:13:41,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2022-07-23 13:13:41,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 1471. [2022-07-23 13:13:41,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 935 states have (on average 1.8374331550802139) internal successors, (1718), 1444 states have internal predecessors, (1718), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-23 13:13:41,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 1760 transitions. [2022-07-23 13:13:41,355 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 1760 transitions. Word has length 132 [2022-07-23 13:13:41,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:13:41,355 INFO L495 AbstractCegarLoop]: Abstraction has 1471 states and 1760 transitions. [2022-07-23 13:13:41,355 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) [2022-07-23 13:13:41,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 1760 transitions. [2022-07-23 13:13:41,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-23 13:13:41,356 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:13:41,356 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] [2022-07-23 13:13:41,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2022-07-23 13:13:41,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-23 13:13:41,779 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 [2022-07-23 13:13:41,779 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr79REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-23 13:13:41,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:13:41,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1958349149, now seen corresponding path program 1 times [2022-07-23 13:13:41,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:13:41,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1787062551] [2022-07-23 13:13:41,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:13:41,781 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:13:41,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:13:41,782 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) [2022-07-23 13:13:41,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-23 13:13:42,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:13:42,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 120 conjunts are in the unsatisfiable core [2022-07-23 13:13:42,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:13:42,613 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 [2022-07-23 13:13:42,771 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 [2022-07-23 13:13:42,798 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 13:13:42,798 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 [2022-07-23 13:13:42,818 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 [2022-07-23 13:13:42,822 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 [2022-07-23 13:13:42,897 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 [2022-07-23 13:13:42,900 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 [2022-07-23 13:13:44,107 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 [2022-07-23 13:13:44,156 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 13:13:44,156 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 [2022-07-23 13:13:44,160 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 [2022-07-23 13:13:44,205 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 [2022-07-23 13:13:44,208 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 [2022-07-23 13:13:44,229 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 903 trivial. 44 not checked. [2022-07-23 13:13:44,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:13:44,898 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 [2022-07-23 13:13:44,902 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:13:44,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1787062551] [2022-07-23 13:13:44,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1787062551] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:13:44,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [95330252] [2022-07-23 13:13:44,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:13:44,903 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 13:13:44,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 13:13:44,904 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) [2022-07-23 13:13:44,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process