./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test19-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test19-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ --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 16c93f411f7e7984964960171e6986ff89eb89f75783c8b2783bb47b46e751d9 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 11:05:09,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 11:05:09,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 11:05:09,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 11:05:09,479 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 11:05:09,483 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 11:05:09,486 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 11:05:09,489 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 11:05:09,495 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 11:05:09,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 11:05:09,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 11:05:09,504 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 11:05:09,504 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 11:05:09,507 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 11:05:09,509 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 11:05:09,511 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 11:05:09,512 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 11:05:09,513 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 11:05:09,516 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 11:05:09,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 11:05:09,525 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 11:05:09,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 11:05:09,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 11:05:09,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 11:05:09,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 11:05:09,543 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 11:05:09,543 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 11:05:09,545 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 11:05:09,546 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 11:05:09,547 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 11:05:09,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 11:05:09,554 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 11:05:09,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 11:05:09,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 11:05:09,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 11:05:09,558 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 11:05:09,559 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 11:05:09,559 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 11:05:09,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 11:05:09,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 11:05:09,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 11:05:09,562 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-17 11:05:09,595 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 11:05:09,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 11:05:09,596 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 11:05:09,596 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 11:05:09,597 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 11:05:09,597 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 11:05:09,598 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 11:05:09,598 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 11:05:09,598 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 11:05:09,598 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 11:05:09,599 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 11:05:09,599 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-17 11:05:09,599 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 11:05:09,599 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 11:05:09,599 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 11:05:09,600 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-17 11:05:09,600 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-17 11:05:09,600 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-17 11:05:09,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 11:05:09,601 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-17 11:05:09,601 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 11:05:09,601 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 11:05:09,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 11:05:09,601 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 11:05:09,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 11:05:09,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:05:09,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 11:05:09,602 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 11:05:09,603 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 11:05:09,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 11:05:09,603 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16c93f411f7e7984964960171e6986ff89eb89f75783c8b2783bb47b46e751d9 [2022-10-17 11:05:09,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 11:05:09,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 11:05:09,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 11:05:09,862 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 11:05:09,862 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 11:05:09,864 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/ldv-memsafety/memleaks_test19-1.i [2022-10-17 11:05:09,933 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/data/72a2fd9ba/5dd4086316e44f3b878fd4a23771672e/FLAGdee6fb86b [2022-10-17 11:05:10,534 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 11:05:10,535 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/sv-benchmarks/c/ldv-memsafety/memleaks_test19-1.i [2022-10-17 11:05:10,558 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/data/72a2fd9ba/5dd4086316e44f3b878fd4a23771672e/FLAGdee6fb86b [2022-10-17 11:05:10,754 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/data/72a2fd9ba/5dd4086316e44f3b878fd4a23771672e [2022-10-17 11:05:10,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 11:05:10,760 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 11:05:10,765 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 11:05:10,765 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 11:05:10,769 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 11:05:10,770 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:05:10" (1/1) ... [2022-10-17 11:05:10,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61ac5e09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:05:10, skipping insertion in model container [2022-10-17 11:05:10,771 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:05:10" (1/1) ... [2022-10-17 11:05:10,778 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 11:05:10,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 11:05:11,314 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:05:11,334 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) [2022-10-17 11:05:11,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7dbe8d01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:05:11, skipping insertion in model container [2022-10-17 11:05:11,335 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 11:05:11,335 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-10-17 11:05:11,338 INFO L158 Benchmark]: Toolchain (without parser) took 576.43ms. Allocated memory is still 92.3MB. Free memory was 67.1MB in the beginning and 62.0MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-10-17 11:05:11,339 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 92.3MB. Free memory is still 61.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 11:05:11,340 INFO L158 Benchmark]: CACSL2BoogieTranslator took 570.69ms. Allocated memory is still 92.3MB. Free memory was 66.7MB in the beginning and 62.0MB in the end (delta: 4.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-10-17 11:05:11,342 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 92.3MB. Free memory is still 61.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 570.69ms. Allocated memory is still 92.3MB. Free memory was 66.7MB in the beginning and 62.0MB in the end (delta: 4.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test19-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ --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 16c93f411f7e7984964960171e6986ff89eb89f75783c8b2783bb47b46e751d9 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 11:05:13,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 11:05:13,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 11:05:13,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 11:05:13,597 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 11:05:13,599 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 11:05:13,601 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 11:05:13,603 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 11:05:13,605 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 11:05:13,606 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 11:05:13,607 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 11:05:13,609 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 11:05:13,610 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 11:05:13,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 11:05:13,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 11:05:13,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 11:05:13,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 11:05:13,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 11:05:13,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 11:05:13,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 11:05:13,625 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 11:05:13,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 11:05:13,635 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 11:05:13,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 11:05:13,651 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 11:05:13,651 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 11:05:13,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 11:05:13,653 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 11:05:13,653 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 11:05:13,655 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 11:05:13,655 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 11:05:13,656 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 11:05:13,657 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 11:05:13,658 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 11:05:13,659 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 11:05:13,659 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 11:05:13,660 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 11:05:13,661 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 11:05:13,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 11:05:13,664 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 11:05:13,665 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 11:05:13,666 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-10-17 11:05:13,720 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 11:05:13,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 11:05:13,722 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 11:05:13,722 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 11:05:13,723 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 11:05:13,723 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 11:05:13,724 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 11:05:13,725 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 11:05:13,725 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 11:05:13,725 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 11:05:13,726 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 11:05:13,727 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-17 11:05:13,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 11:05:13,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 11:05:13,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 11:05:13,728 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-17 11:05:13,728 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-17 11:05:13,728 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-17 11:05:13,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 11:05:13,729 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-17 11:05:13,729 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-10-17 11:05:13,729 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-10-17 11:05:13,730 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 11:05:13,730 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 11:05:13,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 11:05:13,730 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 11:05:13,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 11:05:13,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:05:13,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 11:05:13,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 11:05:13,732 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-10-17 11:05:13,732 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-10-17 11:05:13,733 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-10-17 11:05:13,733 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16c93f411f7e7984964960171e6986ff89eb89f75783c8b2783bb47b46e751d9 [2022-10-17 11:05:14,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 11:05:14,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 11:05:14,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 11:05:14,138 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 11:05:14,139 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 11:05:14,140 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/ldv-memsafety/memleaks_test19-1.i [2022-10-17 11:05:14,226 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/data/80ce2bc9c/00b8585847ab4e92b5aec269c3541395/FLAG578d2671e [2022-10-17 11:05:14,910 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 11:05:14,910 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/sv-benchmarks/c/ldv-memsafety/memleaks_test19-1.i [2022-10-17 11:05:14,926 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/data/80ce2bc9c/00b8585847ab4e92b5aec269c3541395/FLAG578d2671e [2022-10-17 11:05:15,153 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/data/80ce2bc9c/00b8585847ab4e92b5aec269c3541395 [2022-10-17 11:05:15,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 11:05:15,160 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 11:05:15,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 11:05:15,164 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 11:05:15,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 11:05:15,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:05:15" (1/1) ... [2022-10-17 11:05:15,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4047475a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:05:15, skipping insertion in model container [2022-10-17 11:05:15,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:05:15" (1/1) ... [2022-10-17 11:05:15,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 11:05:15,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 11:05:15,818 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:05:15,842 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-10-17 11:05:15,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 11:05:15,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:05:15,952 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 11:05:16,028 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:05:16,086 INFO L208 MainTranslator]: Completed translation [2022-10-17 11:05:16,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:05:16 WrapperNode [2022-10-17 11:05:16,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 11:05:16,088 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 11:05:16,088 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 11:05:16,088 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 11:05:16,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:05:16" (1/1) ... [2022-10-17 11:05:16,130 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:05:16" (1/1) ... [2022-10-17 11:05:16,177 INFO L138 Inliner]: procedures = 171, calls = 87, calls flagged for inlining = 25, calls inlined = 7, statements flattened = 77 [2022-10-17 11:05:16,178 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 11:05:16,179 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 11:05:16,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 11:05:16,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 11:05:16,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:05:16" (1/1) ... [2022-10-17 11:05:16,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:05:16" (1/1) ... [2022-10-17 11:05:16,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:05:16" (1/1) ... [2022-10-17 11:05:16,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:05:16" (1/1) ... [2022-10-17 11:05:16,225 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:05:16" (1/1) ... [2022-10-17 11:05:16,240 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:05:16" (1/1) ... [2022-10-17 11:05:16,243 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:05:16" (1/1) ... [2022-10-17 11:05:16,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:05:16" (1/1) ... [2022-10-17 11:05:16,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 11:05:16,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 11:05:16,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 11:05:16,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 11:05:16,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:05:16" (1/1) ... [2022-10-17 11:05:16,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:05:16,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:05:16,295 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 11:05:16,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 11:05:16,344 INFO L130 BoogieDeclarations]: Found specification of procedure f19_undo [2022-10-17 11:05:16,345 INFO L138 BoogieDeclarations]: Found implementation of procedure f19_undo [2022-10-17 11:05:16,345 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-10-17 11:05:16,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-10-17 11:05:16,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 11:05:16,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 11:05:16,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 11:05:16,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 11:05:16,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 11:05:16,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 11:05:16,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 11:05:16,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 11:05:16,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 11:05:16,531 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 11:05:16,548 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 11:05:16,934 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 11:05:16,941 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 11:05:16,941 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-17 11:05:16,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:05:16 BoogieIcfgContainer [2022-10-17 11:05:16,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 11:05:16,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 11:05:16,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 11:05:16,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 11:05:16,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 11:05:15" (1/3) ... [2022-10-17 11:05:16,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f6c5567 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:05:16, skipping insertion in model container [2022-10-17 11:05:16,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:05:16" (2/3) ... [2022-10-17 11:05:16,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f6c5567 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:05:16, skipping insertion in model container [2022-10-17 11:05:16,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:05:16" (3/3) ... [2022-10-17 11:05:16,962 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test19-1.i [2022-10-17 11:05:16,981 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 11:05:16,981 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2022-10-17 11:05:17,028 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 11:05:17,035 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7d573da6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 11:05:17,036 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2022-10-17 11:05:17,040 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 64 states have internal predecessors, (69), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-17 11:05:17,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-17 11:05:17,047 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:05:17,048 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:05:17,049 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-17 11:05:17,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:05:17,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1461209413, now seen corresponding path program 1 times [2022-10-17 11:05:17,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 11:05:17,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [328966861] [2022-10-17 11:05:17,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:05:17,068 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 11:05:17,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 11:05:17,071 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 11:05:17,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-10-17 11:05:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:17,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 11:05:17,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:05:17,300 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 7 [2022-10-17 11:05:17,449 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-10-17 11:05:17,451 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 14 treesize of output 20 [2022-10-17 11:05:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:05:17,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:05:17,470 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 11:05:17,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [328966861] [2022-10-17 11:05:17,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [328966861] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:05:17,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:05:17,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 11:05:17,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249030928] [2022-10-17 11:05:17,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:05:17,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 11:05:17,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 11:05:17,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 11:05:17,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:05:17,527 INFO L87 Difference]: Start difference. First operand has 70 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 64 states have internal predecessors, (69), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 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) [2022-10-17 11:05:17,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:05:17,823 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2022-10-17 11:05:17,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 11:05:17,825 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 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 8 [2022-10-17 11:05:17,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:05:17,838 INFO L225 Difference]: With dead ends: 98 [2022-10-17 11:05:17,838 INFO L226 Difference]: Without dead ends: 96 [2022-10-17 11:05:17,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:05:17,851 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 51 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 11:05:17,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 207 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 82 Invalid, 0 Unknown, 41 Unchecked, 0.3s Time] [2022-10-17 11:05:17,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-10-17 11:05:17,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 75. [2022-10-17 11:05:17,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 68 states have internal predecessors, (80), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-10-17 11:05:17,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2022-10-17 11:05:17,913 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 8 [2022-10-17 11:05:17,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:05:17,914 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2022-10-17 11:05:17,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 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) [2022-10-17 11:05:17,914 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2022-10-17 11:05:17,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-17 11:05:17,915 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:05:17,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:05:17,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-10-17 11:05:18,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 11:05:18,127 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-17 11:05:18,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:05:18,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1461209414, now seen corresponding path program 1 times [2022-10-17 11:05:18,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 11:05:18,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072045146] [2022-10-17 11:05:18,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:05:18,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 11:05:18,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 11:05:18,130 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 11:05:18,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-10-17 11:05:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:18,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-17 11:05:18,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:05:18,258 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 7 [2022-10-17 11:05:18,267 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 [2022-10-17 11:05:20,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 11:05:20,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-10-17 11:05:20,490 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-10-17 11:05:20,490 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 13 treesize of output 13 [2022-10-17 11:05:20,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:05:20,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:05:20,526 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 11:05:20,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072045146] [2022-10-17 11:05:20,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072045146] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:05:20,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:05:20,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 11:05:20,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940115533] [2022-10-17 11:05:20,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:05:20,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 11:05:20,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 11:05:20,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 11:05:20,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=19, Unknown=1, NotChecked=0, Total=30 [2022-10-17 11:05:20,529 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 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) [2022-10-17 11:05:20,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:05:20,866 INFO L93 Difference]: Finished difference Result 120 states and 134 transitions. [2022-10-17 11:05:20,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 11:05:20,867 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 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 8 [2022-10-17 11:05:20,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:05:20,869 INFO L225 Difference]: With dead ends: 120 [2022-10-17 11:05:20,869 INFO L226 Difference]: Without dead ends: 120 [2022-10-17 11:05:20,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=10, Invalid=19, Unknown=1, NotChecked=0, Total=30 [2022-10-17 11:05:20,870 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 105 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 11:05:20,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 211 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 106 Invalid, 0 Unknown, 56 Unchecked, 0.3s Time] [2022-10-17 11:05:20,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-10-17 11:05:20,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 77. [2022-10-17 11:05:20,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 69 states have internal predecessors, (82), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-10-17 11:05:20,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2022-10-17 11:05:20,883 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 8 [2022-10-17 11:05:20,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:05:20,883 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2022-10-17 11:05:20,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 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) [2022-10-17 11:05:20,884 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2022-10-17 11:05:20,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-17 11:05:20,884 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:05:20,885 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:05:20,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-10-17 11:05:21,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 11:05:21,097 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-17 11:05:21,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:05:21,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1807662222, now seen corresponding path program 1 times [2022-10-17 11:05:21,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 11:05:21,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1486271593] [2022-10-17 11:05:21,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:05:21,098 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 11:05:21,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 11:05:21,099 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 11:05:21,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-10-17 11:05:21,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:21,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 11:05:21,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:05:21,220 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 [2022-10-17 11:05:21,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-10-17 11:05:21,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:05:21,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:05:21,263 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 11:05:21,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1486271593] [2022-10-17 11:05:21,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1486271593] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:05:21,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:05:21,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 11:05:21,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58448197] [2022-10-17 11:05:21,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:05:21,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 11:05:21,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 11:05:21,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 11:05:21,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 11:05:21,266 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-10-17 11:05:21,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:05:21,447 INFO L93 Difference]: Finished difference Result 86 states and 107 transitions. [2022-10-17 11:05:21,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 11:05:21,448 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 15 [2022-10-17 11:05:21,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:05:21,449 INFO L225 Difference]: With dead ends: 86 [2022-10-17 11:05:21,450 INFO L226 Difference]: Without dead ends: 86 [2022-10-17 11:05:21,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-10-17 11:05:21,451 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 4 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:05:21,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 320 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 11:05:21,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-10-17 11:05:21,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2022-10-17 11:05:21,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 53 states have (on average 1.6226415094339623) internal successors, (86), 72 states have internal predecessors, (86), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-10-17 11:05:21,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2022-10-17 11:05:21,462 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 15 [2022-10-17 11:05:21,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:05:21,462 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2022-10-17 11:05:21,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-10-17 11:05:21,463 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2022-10-17 11:05:21,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-17 11:05:21,464 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:05:21,464 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:05:21,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-10-17 11:05:21,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 11:05:21,676 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-17 11:05:21,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:05:21,676 INFO L85 PathProgramCache]: Analyzing trace with hash 690353715, now seen corresponding path program 1 times [2022-10-17 11:05:21,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 11:05:21,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275422333] [2022-10-17 11:05:21,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:05:21,677 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 11:05:21,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 11:05:21,679 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 11:05:21,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-10-17 11:05:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:21,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 11:05:21,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:05:21,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:05:21,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:05:21,842 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 11:05:21,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275422333] [2022-10-17 11:05:21,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275422333] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:05:21,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:05:21,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 11:05:21,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681726902] [2022-10-17 11:05:21,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:05:21,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 11:05:21,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 11:05:21,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 11:05:21,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:05:21,845 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-10-17 11:05:21,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:05:21,907 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2022-10-17 11:05:21,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 11:05:21,908 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 15 [2022-10-17 11:05:21,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:05:21,910 INFO L225 Difference]: With dead ends: 88 [2022-10-17 11:05:21,910 INFO L226 Difference]: Without dead ends: 88 [2022-10-17 11:05:21,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-10-17 11:05:21,913 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 25 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:05:21,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 250 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:05:21,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-10-17 11:05:21,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2022-10-17 11:05:21,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 56 states have (on average 1.5892857142857142) internal successors, (89), 75 states have internal predecessors, (89), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-10-17 11:05:21,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2022-10-17 11:05:21,931 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 15 [2022-10-17 11:05:21,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:05:21,931 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2022-10-17 11:05:21,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-10-17 11:05:21,932 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2022-10-17 11:05:21,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-17 11:05:21,932 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:05:21,933 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:05:21,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-10-17 11:05:22,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 11:05:22,134 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-17 11:05:22,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:05:22,134 INFO L85 PathProgramCache]: Analyzing trace with hash 891124571, now seen corresponding path program 1 times [2022-10-17 11:05:22,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 11:05:22,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [563165920] [2022-10-17 11:05:22,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:05:22,135 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 11:05:22,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 11:05:22,136 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 11:05:22,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-10-17 11:05:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:22,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 11:05:22,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:05:22,241 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 7 [2022-10-17 11:05:22,334 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-10-17 11:05:22,334 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 14 treesize of output 20 [2022-10-17 11:05:22,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:05:22,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:05:22,350 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 11:05:22,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [563165920] [2022-10-17 11:05:22,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [563165920] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:05:22,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:05:22,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 11:05:22,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693328403] [2022-10-17 11:05:22,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:05:22,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 11:05:22,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 11:05:22,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 11:05:22,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 11:05:22,353 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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) [2022-10-17 11:05:22,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:05:22,638 INFO L93 Difference]: Finished difference Result 118 states and 133 transitions. [2022-10-17 11:05:22,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 11:05:22,639 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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 17 [2022-10-17 11:05:22,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:05:22,640 INFO L225 Difference]: With dead ends: 118 [2022-10-17 11:05:22,640 INFO L226 Difference]: Without dead ends: 118 [2022-10-17 11:05:22,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-10-17 11:05:22,641 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 81 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 11:05:22,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 244 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 126 Invalid, 0 Unknown, 51 Unchecked, 0.3s Time] [2022-10-17 11:05:22,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-10-17 11:05:22,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 82. [2022-10-17 11:05:22,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 56 states have (on average 1.5178571428571428) internal successors, (85), 73 states have internal predecessors, (85), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-10-17 11:05:22,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2022-10-17 11:05:22,650 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 17 [2022-10-17 11:05:22,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:05:22,650 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2022-10-17 11:05:22,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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) [2022-10-17 11:05:22,650 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2022-10-17 11:05:22,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-17 11:05:22,651 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:05:22,651 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:05:22,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-10-17 11:05:22,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 11:05:22,863 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-17 11:05:22,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:05:22,863 INFO L85 PathProgramCache]: Analyzing trace with hash 891124572, now seen corresponding path program 1 times [2022-10-17 11:05:22,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 11:05:22,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980413403] [2022-10-17 11:05:22,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:05:22,864 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 11:05:22,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 11:05:22,865 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 11:05:22,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-10-17 11:05:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:22,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-17 11:05:22,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:05:22,977 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 [2022-10-17 11:05:25,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 11:05:25,189 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 [2022-10-17 11:05:25,207 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-10-17 11:05:25,207 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 13 treesize of output 13 [2022-10-17 11:05:25,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:05:25,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:05:25,236 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 11:05:25,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [980413403] [2022-10-17 11:05:25,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [980413403] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:05:25,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:05:25,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 11:05:25,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544052426] [2022-10-17 11:05:25,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:05:25,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 11:05:25,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 11:05:25,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 11:05:25,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=52, Unknown=1, NotChecked=0, Total=72 [2022-10-17 11:05:25,250 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 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) [2022-10-17 11:05:25,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:05:25,879 INFO L93 Difference]: Finished difference Result 148 states and 162 transitions. [2022-10-17 11:05:25,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 11:05:25,880 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 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 17 [2022-10-17 11:05:25,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:05:25,881 INFO L225 Difference]: With dead ends: 148 [2022-10-17 11:05:25,881 INFO L226 Difference]: Without dead ends: 148 [2022-10-17 11:05:25,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=40, Invalid=91, Unknown=1, NotChecked=0, Total=132 [2022-10-17 11:05:25,882 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 152 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 11:05:25,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 333 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 239 Invalid, 0 Unknown, 52 Unchecked, 0.5s Time] [2022-10-17 11:05:25,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-10-17 11:05:25,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 80. [2022-10-17 11:05:25,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 71 states have internal predecessors, (81), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-10-17 11:05:25,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2022-10-17 11:05:25,890 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 17 [2022-10-17 11:05:25,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:05:25,890 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2022-10-17 11:05:25,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 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) [2022-10-17 11:05:25,891 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2022-10-17 11:05:25,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-17 11:05:25,892 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:05:25,892 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:05:25,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-10-17 11:05:26,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 11:05:26,093 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-17 11:05:26,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:05:26,093 INFO L85 PathProgramCache]: Analyzing trace with hash 2005389781, now seen corresponding path program 1 times [2022-10-17 11:05:26,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 11:05:26,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605374131] [2022-10-17 11:05:26,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:05:26,094 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 11:05:26,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 11:05:26,095 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 11:05:26,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-10-17 11:05:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:26,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 11:05:26,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:05:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:05:26,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:05:26,326 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 11:05:26,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605374131] [2022-10-17 11:05:26,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [605374131] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:05:26,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:05:26,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 11:05:26,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231443415] [2022-10-17 11:05:26,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:05:26,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 11:05:26,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 11:05:26,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 11:05:26,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:05:26,328 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-10-17 11:05:26,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:05:26,400 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2022-10-17 11:05:26,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 11:05:26,400 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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 17 [2022-10-17 11:05:26,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:05:26,402 INFO L225 Difference]: With dead ends: 84 [2022-10-17 11:05:26,402 INFO L226 Difference]: Without dead ends: 78 [2022-10-17 11:05:26,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:05:26,403 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 10 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:05:26,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 194 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2022-10-17 11:05:26,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-10-17 11:05:26,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2022-10-17 11:05:26,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 49 states have (on average 1.489795918367347) internal successors, (73), 65 states have internal predecessors, (73), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-10-17 11:05:26,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-10-17 11:05:26,419 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 17 [2022-10-17 11:05:26,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:05:26,421 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-10-17 11:05:26,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-10-17 11:05:26,422 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-10-17 11:05:26,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-17 11:05:26,423 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:05:26,423 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:05:26,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-10-17 11:05:26,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 11:05:26,637 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-17 11:05:26,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:05:26,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1867537779, now seen corresponding path program 1 times [2022-10-17 11:05:26,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 11:05:26,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430879302] [2022-10-17 11:05:26,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:05:26,638 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 11:05:26,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 11:05:26,639 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 11:05:26,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-10-17 11:05:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:26,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 11:05:26,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:05:26,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 11:05:26,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:05:26,741 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 11:05:26,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430879302] [2022-10-17 11:05:26,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [430879302] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:05:26,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:05:26,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 11:05:26,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67842745] [2022-10-17 11:05:26,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:05:26,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 11:05:26,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 11:05:26,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 11:05:26,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 11:05:26,743 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 11:05:26,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:05:26,777 INFO L93 Difference]: Finished difference Result 145 states and 165 transitions. [2022-10-17 11:05:26,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 11:05:26,778 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-10-17 11:05:26,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:05:26,779 INFO L225 Difference]: With dead ends: 145 [2022-10-17 11:05:26,780 INFO L226 Difference]: Without dead ends: 145 [2022-10-17 11:05:26,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:05:26,781 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 83 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:05:26,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 227 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:05:26,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-10-17 11:05:26,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 77. [2022-10-17 11:05:26,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 69 states have internal predecessors, (77), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-10-17 11:05:26,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2022-10-17 11:05:26,788 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 23 [2022-10-17 11:05:26,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:05:26,788 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2022-10-17 11:05:26,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 11:05:26,789 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2022-10-17 11:05:26,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-17 11:05:26,790 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:05:26,790 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:05:26,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-10-17 11:05:27,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 11:05:27,002 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-17 11:05:27,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:05:27,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1867478197, now seen corresponding path program 1 times [2022-10-17 11:05:27,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 11:05:27,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2026009149] [2022-10-17 11:05:27,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:05:27,004 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 11:05:27,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 11:05:27,005 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 11:05:27,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-10-17 11:05:27,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:27,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 11:05:27,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:05:27,119 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 11 treesize of output 7 [2022-10-17 11:05:27,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-10-17 11:05:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 11:05:27,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:05:27,153 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 11:05:27,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2026009149] [2022-10-17 11:05:27,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2026009149] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:05:27,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:05:27,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 11:05:27,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186358911] [2022-10-17 11:05:27,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:05:27,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 11:05:27,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 11:05:27,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 11:05:27,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 11:05:27,156 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 11:05:27,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:05:27,291 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2022-10-17 11:05:27,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 11:05:27,292 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-10-17 11:05:27,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:05:27,293 INFO L225 Difference]: With dead ends: 100 [2022-10-17 11:05:27,293 INFO L226 Difference]: Without dead ends: 100 [2022-10-17 11:05:27,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-10-17 11:05:27,294 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 33 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:05:27,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 298 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 11:05:27,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-10-17 11:05:27,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 75. [2022-10-17 11:05:27,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 66 states have internal predecessors, (73), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-10-17 11:05:27,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2022-10-17 11:05:27,299 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 23 [2022-10-17 11:05:27,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:05:27,300 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2022-10-17 11:05:27,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 11:05:27,300 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2022-10-17 11:05:27,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-17 11:05:27,301 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:05:27,301 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:05:27,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-10-17 11:05:27,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 11:05:27,513 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-17 11:05:27,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:05:27,513 INFO L85 PathProgramCache]: Analyzing trace with hash 440766702, now seen corresponding path program 1 times [2022-10-17 11:05:27,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 11:05:27,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537869621] [2022-10-17 11:05:27,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:05:27,514 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 11:05:27,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 11:05:27,515 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 11:05:27,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-10-17 11:05:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:27,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-17 11:05:27,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:05:27,694 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 [2022-10-17 11:05:27,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 11:05:27,879 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 21 treesize of output 20 [2022-10-17 11:05:27,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-17 11:05:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:05:27,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:05:30,006 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 11:05:30,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537869621] [2022-10-17 11:05:30,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537869621] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:05:30,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [559437686] [2022-10-17 11:05:30,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:05:30,007 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-10-17 11:05:30,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/cvc4 [2022-10-17 11:05:30,011 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-10-17 11:05:30,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-10-17 11:05:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:30,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-10-17 11:05:30,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:05:30,232 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 [2022-10-17 11:05:30,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 11:05:30,355 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 21 treesize of output 20 [2022-10-17 11:05:30,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-17 11:05:30,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:05:30,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:05:32,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [559437686] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:05:32,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 11:05:32,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-10-17 11:05:32,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452591266] [2022-10-17 11:05:32,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 11:05:32,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 11:05:32,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 11:05:32,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 11:05:32,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=80, Unknown=1, NotChecked=0, Total=110 [2022-10-17 11:05:32,471 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 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) [2022-10-17 11:05:32,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:05:32,643 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2022-10-17 11:05:32,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 11:05:32,644 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 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 24 [2022-10-17 11:05:32,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:05:32,650 INFO L225 Difference]: With dead ends: 80 [2022-10-17 11:05:32,650 INFO L226 Difference]: Without dead ends: 80 [2022-10-17 11:05:32,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=47, Invalid=134, Unknown=1, NotChecked=0, Total=182 [2022-10-17 11:05:32,651 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 83 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:05:32,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 259 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2022-10-17 11:05:32,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-10-17 11:05:32,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2022-10-17 11:05:32,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 68 states have internal predecessors, (76), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-17 11:05:32,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2022-10-17 11:05:32,656 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 24 [2022-10-17 11:05:32,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:05:32,657 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2022-10-17 11:05:32,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 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) [2022-10-17 11:05:32,657 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2022-10-17 11:05:32,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-17 11:05:32,658 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:05:32,658 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:05:32,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-10-17 11:05:32,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-10-17 11:05:33,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/cvc4 --incremental --print-success --lang smt [2022-10-17 11:05:33,070 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-17 11:05:33,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:05:33,071 INFO L85 PathProgramCache]: Analyzing trace with hash 778865962, now seen corresponding path program 1 times [2022-10-17 11:05:33,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 11:05:33,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97520612] [2022-10-17 11:05:33,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:05:33,071 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 11:05:33,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 11:05:33,072 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 11:05:33,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-10-17 11:05:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:33,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-17 11:05:33,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:05:33,281 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 [2022-10-17 11:05:33,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 11:05:33,550 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 31 treesize of output 24 [2022-10-17 11:05:33,641 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 23 treesize of output 11 [2022-10-17 11:05:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:05:33,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:05:33,892 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 11:05:33,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97520612] [2022-10-17 11:05:33,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97520612] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:05:33,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1262367809] [2022-10-17 11:05:33,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:05:33,893 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-10-17 11:05:33,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/cvc4 [2022-10-17 11:05:33,894 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-10-17 11:05:33,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-10-17 11:05:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:34,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-10-17 11:05:34,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:05:34,184 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 [2022-10-17 11:05:36,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 11:05:36,506 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 21 treesize of output 20 [2022-10-17 11:05:36,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-17 11:05:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:05:36,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:05:37,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1262367809] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:05:37,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 11:05:37,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-10-17 11:05:37,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716386375] [2022-10-17 11:05:37,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 11:05:37,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-17 11:05:37,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 11:05:37,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-17 11:05:37,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=256, Unknown=1, NotChecked=0, Total=342 [2022-10-17 11:05:37,757 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 17 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-17 11:05:38,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:05:38,581 INFO L93 Difference]: Finished difference Result 137 states and 155 transitions. [2022-10-17 11:05:38,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-17 11:05:38,582 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2022-10-17 11:05:38,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:05:38,583 INFO L225 Difference]: With dead ends: 137 [2022-10-17 11:05:38,584 INFO L226 Difference]: Without dead ends: 137 [2022-10-17 11:05:38,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=167, Invalid=534, Unknown=1, NotChecked=0, Total=702 [2022-10-17 11:05:38,587 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 202 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 11:05:38,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 289 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 182 Invalid, 0 Unknown, 45 Unchecked, 0.5s Time] [2022-10-17 11:05:38,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-10-17 11:05:38,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 77. [2022-10-17 11:05:38,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 54 states have (on average 1.3888888888888888) internal successors, (75), 67 states have internal predecessors, (75), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-17 11:05:38,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2022-10-17 11:05:38,592 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 25 [2022-10-17 11:05:38,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:05:38,593 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2022-10-17 11:05:38,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-17 11:05:38,593 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2022-10-17 11:05:38,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-17 11:05:38,594 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:05:38,596 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:05:38,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-10-17 11:05:38,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-10-17 11:05:38,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 11:05:38,999 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-17 11:05:38,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:05:38,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1765484354, now seen corresponding path program 1 times [2022-10-17 11:05:38,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 11:05:38,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1514454489] [2022-10-17 11:05:38,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:05:38,999 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 11:05:39,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 11:05:39,001 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 11:05:39,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-10-17 11:05:39,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:39,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 11:05:39,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:05:39,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 11:05:39,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:05:39,187 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 11:05:39,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1514454489] [2022-10-17 11:05:39,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1514454489] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:05:39,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:05:39,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 11:05:39,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722908372] [2022-10-17 11:05:39,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:05:39,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 11:05:39,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 11:05:39,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 11:05:39,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 11:05:39,189 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 11:05:39,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:05:39,413 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2022-10-17 11:05:39,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 11:05:39,414 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-10-17 11:05:39,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:05:39,415 INFO L225 Difference]: With dead ends: 98 [2022-10-17 11:05:39,416 INFO L226 Difference]: Without dead ends: 98 [2022-10-17 11:05:39,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-10-17 11:05:39,417 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 87 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 11:05:39,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 148 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 11:05:39,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-10-17 11:05:39,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 79. [2022-10-17 11:05:39,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 68 states have internal predecessors, (78), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-17 11:05:39,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2022-10-17 11:05:39,422 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 27 [2022-10-17 11:05:39,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:05:39,422 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2022-10-17 11:05:39,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 11:05:39,423 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2022-10-17 11:05:39,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-17 11:05:39,424 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:05:39,424 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:05:39,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-10-17 11:05:39,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 11:05:39,636 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-17 11:05:39,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:05:39,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1765484353, now seen corresponding path program 1 times [2022-10-17 11:05:39,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 11:05:39,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848622901] [2022-10-17 11:05:39,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:05:39,639 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 11:05:39,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 11:05:39,639 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 11:05:39,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-10-17 11:05:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:39,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-17 11:05:39,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:05:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 11:05:39,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:05:39,981 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 11:05:39,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [848622901] [2022-10-17 11:05:39,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [848622901] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:05:39,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:05:39,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 11:05:39,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946270000] [2022-10-17 11:05:39,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:05:39,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 11:05:39,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 11:05:39,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 11:05:39,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-10-17 11:05:39,983 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 11:05:40,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:05:40,242 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2022-10-17 11:05:40,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 11:05:40,244 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-10-17 11:05:40,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:05:40,245 INFO L225 Difference]: With dead ends: 87 [2022-10-17 11:05:40,245 INFO L226 Difference]: Without dead ends: 87 [2022-10-17 11:05:40,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-10-17 11:05:40,246 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 118 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 11:05:40,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 152 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 11:05:40,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-10-17 11:05:40,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2022-10-17 11:05:40,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 60 states have (on average 1.4) internal successors, (84), 73 states have internal predecessors, (84), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-17 11:05:40,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2022-10-17 11:05:40,250 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 27 [2022-10-17 11:05:40,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:05:40,250 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2022-10-17 11:05:40,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 11:05:40,250 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2022-10-17 11:05:40,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-17 11:05:40,251 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:05:40,251 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:05:40,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-10-17 11:05:40,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 11:05:40,461 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-17 11:05:40,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:05:40,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1624958864, now seen corresponding path program 1 times [2022-10-17 11:05:40,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 11:05:40,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1294251609] [2022-10-17 11:05:40,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:05:40,462 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 11:05:40,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 11:05:40,463 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 11:05:40,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-10-17 11:05:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:40,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-10-17 11:05:40,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:05:40,592 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 7 [2022-10-17 11:05:40,644 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 [2022-10-17 11:05:40,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-10-17 11:05:40,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 11:05:40,800 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 25 treesize of output 24 [2022-10-17 11:05:40,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-10-17 11:05:40,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:05:40,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:05:43,058 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 11:05:43,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1294251609] [2022-10-17 11:05:43,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1294251609] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:05:43,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [438260906] [2022-10-17 11:05:43,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:05:43,059 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-10-17 11:05:43,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/cvc4 [2022-10-17 11:05:43,059 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-10-17 11:05:43,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-10-17 11:05:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:43,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 23 conjunts are in the unsatisfiable core [2022-10-17 11:05:43,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:05:43,220 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 7 [2022-10-17 11:05:43,243 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 [2022-10-17 11:05:43,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-10-17 11:05:43,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 11:05:43,338 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 25 treesize of output 24 [2022-10-17 11:05:43,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-10-17 11:05:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:05:43,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:05:45,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [438260906] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:05:45,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 11:05:45,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-10-17 11:05:45,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181076923] [2022-10-17 11:05:45,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 11:05:45,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 11:05:45,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 11:05:45,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 11:05:45,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=83, Unknown=1, NotChecked=0, Total=110 [2022-10-17 11:05:45,573 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 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) [2022-10-17 11:05:46,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:05:46,177 INFO L93 Difference]: Finished difference Result 118 states and 136 transitions. [2022-10-17 11:05:46,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 11:05:46,178 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 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 26 [2022-10-17 11:05:46,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:05:46,179 INFO L225 Difference]: With dead ends: 118 [2022-10-17 11:05:46,180 INFO L226 Difference]: Without dead ends: 118 [2022-10-17 11:05:46,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=40, Invalid=115, Unknown=1, NotChecked=0, Total=156 [2022-10-17 11:05:46,181 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 77 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 11:05:46,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 348 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 11:05:46,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-10-17 11:05:46,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 101. [2022-10-17 11:05:46,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.3466666666666667) internal successors, (101), 88 states have internal predecessors, (101), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-10-17 11:05:46,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2022-10-17 11:05:46,187 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 26 [2022-10-17 11:05:46,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:05:46,187 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2022-10-17 11:05:46,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 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) [2022-10-17 11:05:46,187 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2022-10-17 11:05:46,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-17 11:05:46,188 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:05:46,189 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:05:46,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-10-17 11:05:46,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-10-17 11:05:46,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/cvc4 --incremental --print-success --lang smt [2022-10-17 11:05:46,601 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-17 11:05:46,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:05:46,601 INFO L85 PathProgramCache]: Analyzing trace with hash 631952143, now seen corresponding path program 1 times [2022-10-17 11:05:46,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 11:05:46,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667112167] [2022-10-17 11:05:46,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:05:46,602 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 11:05:46,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 11:05:46,604 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 11:05:46,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-10-17 11:05:46,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:46,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-17 11:05:46,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:05:46,769 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 [2022-10-17 11:05:46,781 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 [2022-10-17 11:05:46,828 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 [2022-10-17 11:05:46,840 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 [2022-10-17 11:05:46,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:05:46,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:05:46,867 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 11:05:46,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667112167] [2022-10-17 11:05:46,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667112167] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:05:46,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:05:46,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 11:05:46,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266622358] [2022-10-17 11:05:46,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:05:46,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 11:05:46,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 11:05:46,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 11:05:46,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 11:05:46,868 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 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) [2022-10-17 11:05:47,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:05:47,023 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2022-10-17 11:05:47,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 11:05:47,024 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 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 26 [2022-10-17 11:05:47,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:05:47,025 INFO L225 Difference]: With dead ends: 93 [2022-10-17 11:05:47,025 INFO L226 Difference]: Without dead ends: 87 [2022-10-17 11:05:47,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-10-17 11:05:47,026 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 2 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:05:47,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 313 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 11:05:47,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-10-17 11:05:47,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-10-17 11:05:47,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 63 states have (on average 1.3650793650793651) internal successors, (86), 76 states have internal predecessors, (86), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-17 11:05:47,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2022-10-17 11:05:47,031 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 26 [2022-10-17 11:05:47,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:05:47,032 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2022-10-17 11:05:47,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 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) [2022-10-17 11:05:47,032 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2022-10-17 11:05:47,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-17 11:05:47,033 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:05:47,033 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:05:47,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-10-17 11:05:47,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 11:05:47,234 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-17 11:05:47,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:05:47,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1765464909, now seen corresponding path program 1 times [2022-10-17 11:05:47,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 11:05:47,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1295590344] [2022-10-17 11:05:47,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:05:47,234 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 11:05:47,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 11:05:47,235 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 11:05:47,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-10-17 11:05:47,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:47,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 11:05:47,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:05:47,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 11:05:47,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:05:47,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 11:05:47,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1295590344] [2022-10-17 11:05:47,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1295590344] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:05:47,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:05:47,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 11:05:47,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789503720] [2022-10-17 11:05:47,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:05:47,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 11:05:47,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 11:05:47,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 11:05:47,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 11:05:47,439 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 11:05:47,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:05:47,732 INFO L93 Difference]: Finished difference Result 98 states and 109 transitions. [2022-10-17 11:05:47,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 11:05:47,733 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-10-17 11:05:47,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:05:47,734 INFO L225 Difference]: With dead ends: 98 [2022-10-17 11:05:47,734 INFO L226 Difference]: Without dead ends: 98 [2022-10-17 11:05:47,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-10-17 11:05:47,735 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 114 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 11:05:47,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 143 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 11:05:47,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-10-17 11:05:47,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 90. [2022-10-17 11:05:47,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 66 states have (on average 1.378787878787879) internal successors, (91), 79 states have internal predecessors, (91), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-17 11:05:47,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2022-10-17 11:05:47,738 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 27 [2022-10-17 11:05:47,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:05:47,739 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2022-10-17 11:05:47,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 11:05:47,739 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2022-10-17 11:05:47,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-17 11:05:47,740 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:05:47,740 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:05:47,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-10-17 11:05:47,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 11:05:47,950 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-17 11:05:47,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:05:47,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1765464908, now seen corresponding path program 1 times [2022-10-17 11:05:47,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 11:05:47,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413613722] [2022-10-17 11:05:47,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:05:47,952 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 11:05:47,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 11:05:47,952 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 11:05:47,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-10-17 11:05:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:48,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-17 11:05:48,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:05:48,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 11:05:48,280 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 14 treesize of output 16 [2022-10-17 11:05:48,298 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-10-17 11:05:48,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-10-17 11:05:48,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:05:48,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:05:48,484 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 11:05:48,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413613722] [2022-10-17 11:05:48,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [413613722] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:05:48,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:05:48,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 11:05:48,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724381850] [2022-10-17 11:05:48,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:05:48,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 11:05:48,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 11:05:48,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 11:05:48,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-10-17 11:05:48,486 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 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) [2022-10-17 11:05:49,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:05:49,158 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2022-10-17 11:05:49,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 11:05:49,159 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 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 27 [2022-10-17 11:05:49,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:05:49,159 INFO L225 Difference]: With dead ends: 123 [2022-10-17 11:05:49,160 INFO L226 Difference]: Without dead ends: 123 [2022-10-17 11:05:49,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-10-17 11:05:49,161 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 120 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 11:05:49,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 245 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 177 Invalid, 0 Unknown, 50 Unchecked, 0.5s Time] [2022-10-17 11:05:49,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-10-17 11:05:49,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 89. [2022-10-17 11:05:49,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 78 states have internal predecessors, (89), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-17 11:05:49,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2022-10-17 11:05:49,166 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 27 [2022-10-17 11:05:49,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:05:49,167 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2022-10-17 11:05:49,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 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) [2022-10-17 11:05:49,167 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2022-10-17 11:05:49,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-17 11:05:49,168 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:05:49,168 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:05:49,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e42d1854-5aa6-4ae9-8d1c-dc7a13bdd861/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0