./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc --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 bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 --- 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-5e519f3 [2022-11-02 20:53:42,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:53:42,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:53:42,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:53:42,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:53:42,595 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:53:42,600 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:53:42,602 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:53:42,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:53:42,604 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:53:42,605 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:53:42,606 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:53:42,607 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:53:42,608 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:53:42,609 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:53:42,610 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:53:42,611 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:53:42,612 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:53:42,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:53:42,615 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:53:42,617 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:53:42,618 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:53:42,619 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:53:42,620 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:53:42,624 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:53:42,624 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:53:42,625 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:53:42,625 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:53:42,626 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:53:42,627 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:53:42,627 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:53:42,628 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:53:42,629 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:53:42,630 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:53:42,631 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:53:42,631 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:53:42,632 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:53:42,632 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:53:42,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:53:42,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:53:42,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:53:42,636 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-02 20:53:42,661 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:53:42,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:53:42,662 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:53:42,662 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:53:42,662 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:53:42,663 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:53:42,663 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:53:42,664 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:53:42,664 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:53:42,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:53:42,664 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:53:42,665 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-02 20:53:42,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:53:42,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:53:42,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:53:42,665 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-02 20:53:42,666 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-02 20:53:42,666 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-02 20:53:42,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:53:42,666 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 20:53:42,666 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:53:42,667 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:53:42,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:53:42,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:53:42,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:53:42,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:53:42,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:53:42,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:53:42,668 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:53:42,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:53:42,669 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_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 [2022-11-02 20:53:42,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:53:42,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:53:42,964 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:53:42,965 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:53:42,966 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:53:42,985 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2022-11-02 20:53:43,057 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/data/1d84fb483/698f032700c643bdbad97ff641f528ad/FLAG409a999e8 [2022-11-02 20:53:43,563 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:53:43,563 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2022-11-02 20:53:43,594 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/data/1d84fb483/698f032700c643bdbad97ff641f528ad/FLAG409a999e8 [2022-11-02 20:53:44,093 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/data/1d84fb483/698f032700c643bdbad97ff641f528ad [2022-11-02 20:53:44,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:53:44,104 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:53:44,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:53:44,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:53:44,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:53:44,111 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:53:44" (1/1) ... [2022-11-02 20:53:44,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a513ecd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:44, skipping insertion in model container [2022-11-02 20:53:44,113 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:53:44" (1/1) ... [2022-11-02 20:53:44,121 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:53:44,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:53:44,602 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:53:44,626 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) [2022-11-02 20:53:44,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@336790e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:44, skipping insertion in model container [2022-11-02 20:53:44,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:53:44,628 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-02 20:53:44,631 INFO L158 Benchmark]: Toolchain (without parser) took 525.21ms. Allocated memory is still 92.3MB. Free memory was 56.5MB in the beginning and 65.6MB in the end (delta: -9.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-02 20:53:44,632 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 92.3MB. Free memory is still 74.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:53:44,633 INFO L158 Benchmark]: CACSL2BoogieTranslator took 521.28ms. Allocated memory is still 92.3MB. Free memory was 56.3MB in the beginning and 65.6MB in the end (delta: -9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-02 20:53:44,635 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 92.3MB. Free memory is still 74.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 521.28ms. Allocated memory is still 92.3MB. Free memory was 56.3MB in the beginning and 65.6MB in the end (delta: -9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types 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/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc --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 bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 --- 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-5e519f3 [2022-11-02 20:53:46,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:53:46,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:53:46,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:53:46,878 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:53:46,882 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:53:46,884 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:53:46,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:53:46,896 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:53:46,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:53:46,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:53:46,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:53:46,905 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:53:46,908 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:53:46,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:53:46,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:53:46,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:53:46,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:53:46,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:53:46,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:53:46,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:53:46,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:53:46,929 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:53:46,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:53:46,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:53:46,941 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:53:46,941 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:53:46,943 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:53:46,944 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:53:46,945 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:53:46,945 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:53:46,946 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:53:46,948 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:53:46,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:53:46,950 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:53:46,951 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:53:46,952 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:53:46,952 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:53:46,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:53:46,955 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:53:46,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:53:46,957 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-02 20:53:46,996 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:53:46,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:53:46,997 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:53:46,998 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:53:46,998 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:53:46,999 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:53:47,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:53:47,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:53:47,000 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:53:47,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:53:47,002 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:53:47,002 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-02 20:53:47,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:53:47,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:53:47,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:53:47,003 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-02 20:53:47,003 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-02 20:53:47,003 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-02 20:53:47,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:53:47,003 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 20:53:47,004 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-02 20:53:47,004 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-02 20:53:47,004 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:53:47,004 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:53:47,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:53:47,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:53:47,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:53:47,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:53:47,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:53:47,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:53:47,006 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-02 20:53:47,006 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-02 20:53:47,006 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-02 20:53:47,006 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_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 [2022-11-02 20:53:47,462 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:53:47,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:53:47,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:53:47,493 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:53:47,494 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:53:47,496 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2022-11-02 20:53:47,567 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/data/c11f23749/cb639f7f520c4cdd9211e1a065ae80bc/FLAGc3eebcc35 [2022-11-02 20:53:48,125 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:53:48,126 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2022-11-02 20:53:48,140 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/data/c11f23749/cb639f7f520c4cdd9211e1a065ae80bc/FLAGc3eebcc35 [2022-11-02 20:53:48,465 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/data/c11f23749/cb639f7f520c4cdd9211e1a065ae80bc [2022-11-02 20:53:48,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:53:48,471 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:53:48,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:53:48,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:53:48,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:53:48,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:53:48" (1/1) ... [2022-11-02 20:53:48,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@671c7239 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:48, skipping insertion in model container [2022-11-02 20:53:48,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:53:48" (1/1) ... [2022-11-02 20:53:48,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:53:48,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:53:49,063 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:53:49,086 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-02 20:53:49,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:53:49,129 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:53:49,135 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:53:49,203 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:53:49,292 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:53:49,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:49 WrapperNode [2022-11-02 20:53:49,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:53:49,294 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:53:49,294 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:53:49,294 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:53:49,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:49" (1/1) ... [2022-11-02 20:53:49,333 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:49" (1/1) ... [2022-11-02 20:53:49,356 INFO L138 Inliner]: procedures = 167, calls = 80, calls flagged for inlining = 24, calls inlined = 6, statements flattened = 99 [2022-11-02 20:53:49,357 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:53:49,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:53:49,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:53:49,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:53:49,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:49" (1/1) ... [2022-11-02 20:53:49,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:49" (1/1) ... [2022-11-02 20:53:49,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:49" (1/1) ... [2022-11-02 20:53:49,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:49" (1/1) ... [2022-11-02 20:53:49,380 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:49" (1/1) ... [2022-11-02 20:53:49,384 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:49" (1/1) ... [2022-11-02 20:53:49,386 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:49" (1/1) ... [2022-11-02 20:53:49,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:49" (1/1) ... [2022-11-02 20:53:49,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:53:49,391 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:53:49,391 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:53:49,392 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:53:49,392 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:49" (1/1) ... [2022-11-02 20:53:49,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:53:49,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:49,435 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:53:49,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:53:49,488 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-02 20:53:49,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-02 20:53:49,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:53:49,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:53:49,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 20:53:49,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 20:53:49,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:53:49,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-02 20:53:49,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:53:49,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:53:49,621 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:53:49,623 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:53:50,014 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:53:50,020 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:53:50,021 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-02 20:53:50,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:53:50 BoogieIcfgContainer [2022-11-02 20:53:50,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:53:50,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:53:50,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:53:50,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:53:50,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:53:48" (1/3) ... [2022-11-02 20:53:50,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42032515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:53:50, skipping insertion in model container [2022-11-02 20:53:50,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:49" (2/3) ... [2022-11-02 20:53:50,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42032515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:53:50, skipping insertion in model container [2022-11-02 20:53:50,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:53:50" (3/3) ... [2022-11-02 20:53:50,031 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test17_2-2.i [2022-11-02 20:53:50,048 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:53:50,049 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-11-02 20:53:50,092 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:53:50,098 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;@4c3e0720, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:53:50,098 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-02 20:53:50,103 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 63 states have internal predecessors, (76), 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) [2022-11-02 20:53:50,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 20:53:50,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:53:50,111 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:50,111 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:53:50,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:50,116 INFO L85 PathProgramCache]: Analyzing trace with hash 858994893, now seen corresponding path program 1 times [2022-11-02 20:53:50,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:53:50,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [951116107] [2022-11-02 20:53:50,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:50,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:53:50,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:53:50,137 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:53:50,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-02 20:53:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:50,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-02 20:53:50,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:50,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:50,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:53:50,287 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:53:50,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [951116107] [2022-11-02 20:53:50,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [951116107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:53:50,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:53:50,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:53:50,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241635356] [2022-11-02 20:53:50,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:53:50,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:53:50,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:53:50,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:53:50,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:53:50,335 INFO L87 Difference]: Start difference. First operand has 67 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 63 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-11-02 20:53:50,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:53:50,364 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2022-11-02 20:53:50,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:53:50,366 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 14 [2022-11-02 20:53:50,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:53:50,373 INFO L225 Difference]: With dead ends: 67 [2022-11-02 20:53:50,373 INFO L226 Difference]: Without dead ends: 65 [2022-11-02 20:53:50,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:53:50,383 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:53:50,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:53:50,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-02 20:53:50,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-11-02 20:53:50,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 61 states have internal predecessors, (69), 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) [2022-11-02 20:53:50,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2022-11-02 20:53:50,428 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 14 [2022-11-02 20:53:50,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:53:50,428 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2022-11-02 20:53:50,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-11-02 20:53:50,428 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2022-11-02 20:53:50,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 20:53:50,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:53:50,430 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:50,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:50,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:53:50,641 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:53:50,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:50,641 INFO L85 PathProgramCache]: Analyzing trace with hash 465967883, now seen corresponding path program 1 times [2022-11-02 20:53:50,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:53:50,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563361323] [2022-11-02 20:53:50,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:50,642 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:53:50,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:53:50,645 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:53:50,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-02 20:53:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:50,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:53:50,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:50,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:53:50,834 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:53:50,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563361323] [2022-11-02 20:53:50,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563361323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:53:50,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:53:50,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:53:50,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780430158] [2022-11-02 20:53:50,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:53:50,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:53:50,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:53:50,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:53:50,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:53:50,840 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-11-02 20:53:50,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:53:50,970 INFO L93 Difference]: Finished difference Result 121 states and 137 transitions. [2022-11-02 20:53:50,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:53:50,971 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 14 [2022-11-02 20:53:50,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:53:50,974 INFO L225 Difference]: With dead ends: 121 [2022-11-02 20:53:50,974 INFO L226 Difference]: Without dead ends: 121 [2022-11-02 20:53:50,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:53:50,975 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 57 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:53:50,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 249 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:53:50,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-02 20:53:50,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 69. [2022-11-02 20:53:50,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.6) internal successors, (72), 64 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:53:50,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2022-11-02 20:53:50,987 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 14 [2022-11-02 20:53:50,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:53:50,987 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2022-11-02 20:53:50,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-11-02 20:53:50,988 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2022-11-02 20:53:50,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 20:53:50,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:53:50,989 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:51,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:51,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:53:51,215 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:53:51,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:51,216 INFO L85 PathProgramCache]: Analyzing trace with hash 465866789, now seen corresponding path program 1 times [2022-11-02 20:53:51,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:53:51,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [757021126] [2022-11-02 20:53:51,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:51,217 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:53:51,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:53:51,221 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:53:51,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-02 20:53:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:51,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:53:51,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:51,338 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 [2022-11-02 20:53:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:51,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:53:51,374 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:53:51,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [757021126] [2022-11-02 20:53:51,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [757021126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:53:51,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:53:51,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:53:51,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228077604] [2022-11-02 20:53:51,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:53:51,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:53:51,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:53:51,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:53:51,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:53:51,376 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-11-02 20:53:51,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:53:51,564 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2022-11-02 20:53:51,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:53:51,564 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 14 [2022-11-02 20:53:51,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:53:51,566 INFO L225 Difference]: With dead ends: 93 [2022-11-02 20:53:51,566 INFO L226 Difference]: Without dead ends: 93 [2022-11-02 20:53:51,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:53:51,567 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 24 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:53:51,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 188 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:53:51,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-02 20:53:51,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 80. [2022-11-02 20:53:51,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.5892857142857142) internal successors, (89), 75 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:53:51,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2022-11-02 20:53:51,576 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 14 [2022-11-02 20:53:51,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:53:51,576 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2022-11-02 20:53:51,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-11-02 20:53:51,576 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2022-11-02 20:53:51,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 20:53:51,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:53:51,577 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:51,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:51,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:53:51,789 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:53:51,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:51,789 INFO L85 PathProgramCache]: Analyzing trace with hash 465866790, now seen corresponding path program 1 times [2022-11-02 20:53:51,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:53:51,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320150839] [2022-11-02 20:53:51,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:51,790 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:53:51,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:53:51,792 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:53:51,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-02 20:53:51,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:51,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:53:51,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:51,964 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 [2022-11-02 20:53:52,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:52,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:53:52,210 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:53:52,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320150839] [2022-11-02 20:53:52,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320150839] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:53:52,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:53:52,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 20:53:52,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736233610] [2022-11-02 20:53:52,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:53:52,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:53:52,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:53:52,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:53:52,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:53:52,212 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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) [2022-11-02 20:53:52,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:53:52,804 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2022-11-02 20:53:52,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:53:52,805 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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 14 [2022-11-02 20:53:52,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:53:52,806 INFO L225 Difference]: With dead ends: 117 [2022-11-02 20:53:52,806 INFO L226 Difference]: Without dead ends: 117 [2022-11-02 20:53:52,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:53:52,807 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 221 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:53:52,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 429 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 207 Invalid, 0 Unknown, 39 Unchecked, 0.4s Time] [2022-11-02 20:53:52,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-02 20:53:52,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 100. [2022-11-02 20:53:52,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 76 states have (on average 1.5657894736842106) internal successors, (119), 95 states have internal predecessors, (119), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:53:52,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 125 transitions. [2022-11-02 20:53:52,815 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 125 transitions. Word has length 14 [2022-11-02 20:53:52,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:53:52,816 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 125 transitions. [2022-11-02 20:53:52,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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) [2022-11-02 20:53:52,816 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 125 transitions. [2022-11-02 20:53:52,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 20:53:52,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:53:52,821 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:52,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-11-02 20:53:53,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:53:53,033 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:53:53,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:53,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1353471564, now seen corresponding path program 1 times [2022-11-02 20:53:53,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:53:53,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534994023] [2022-11-02 20:53:53,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:53,034 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:53:53,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:53:53,035 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:53:53,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-02 20:53:53,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:53,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:53:53,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:53,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:53,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:53:53,129 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:53:53,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534994023] [2022-11-02 20:53:53,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534994023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:53:53,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:53:53,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:53:53,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942599348] [2022-11-02 20:53:53,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:53:53,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:53:53,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:53:53,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:53:53,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:53:53,131 INFO L87 Difference]: Start difference. First operand 100 states and 125 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-11-02 20:53:53,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:53:53,283 INFO L93 Difference]: Finished difference Result 144 states and 174 transitions. [2022-11-02 20:53:53,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:53:53,284 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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 14 [2022-11-02 20:53:53,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:53:53,286 INFO L225 Difference]: With dead ends: 144 [2022-11-02 20:53:53,286 INFO L226 Difference]: Without dead ends: 142 [2022-11-02 20:53:53,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:53:53,287 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 48 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:53:53,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 200 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:53:53,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-02 20:53:53,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 100. [2022-11-02 20:53:53,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 76 states have (on average 1.5526315789473684) internal successors, (118), 95 states have internal predecessors, (118), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:53:53,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2022-11-02 20:53:53,297 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 14 [2022-11-02 20:53:53,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:53:53,298 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2022-11-02 20:53:53,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-11-02 20:53:53,298 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2022-11-02 20:53:53,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 20:53:53,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:53:53,299 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:53,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:53,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:53:53,510 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:53:53,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:53,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1353370470, now seen corresponding path program 1 times [2022-11-02 20:53:53,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:53:53,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477393343] [2022-11-02 20:53:53,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:53,511 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:53:53,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:53:53,512 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:53:53,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-02 20:53:53,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:53,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:53:53,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:53,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:53:53,617 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:53:53,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477393343] [2022-11-02 20:53:53,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477393343] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:53:53,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:53:53,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:53:53,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083668427] [2022-11-02 20:53:53,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:53:53,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:53:53,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:53:53,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:53:53,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:53:53,619 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-11-02 20:53:53,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:53:53,674 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2022-11-02 20:53:53,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:53:53,674 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 14 [2022-11-02 20:53:53,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:53:53,675 INFO L225 Difference]: With dead ends: 86 [2022-11-02 20:53:53,675 INFO L226 Difference]: Without dead ends: 84 [2022-11-02 20:53:53,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:53:53,677 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 0 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:53:53,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 275 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:53:53,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-02 20:53:53,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-11-02 20:53:53,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 80 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:53:53,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2022-11-02 20:53:53,683 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 14 [2022-11-02 20:53:53,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:53:53,683 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2022-11-02 20:53:53,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-11-02 20:53:53,684 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2022-11-02 20:53:53,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 20:53:53,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:53:53,684 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:53,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:53,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:53:53,896 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:53:53,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:53,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1598186502, now seen corresponding path program 1 times [2022-11-02 20:53:53,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:53:53,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099852356] [2022-11-02 20:53:53,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:53,897 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:53:53,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:53:53,898 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:53:53,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-02 20:53:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:53,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 20:53:53,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:54,014 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 [2022-11-02 20:53:54,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:54,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:56,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:56,123 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:53:56,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099852356] [2022-11-02 20:53:56,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099852356] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:53:56,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:53:56,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2022-11-02 20:53:56,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460735490] [2022-11-02 20:53:56,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:56,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 20:53:56,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:53:56,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 20:53:56,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:53:56,128 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:53:58,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:53:58,528 INFO L93 Difference]: Finished difference Result 180 states and 204 transitions. [2022-11-02 20:53:58,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:53:58,529 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-11-02 20:53:58,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:53:58,530 INFO L225 Difference]: With dead ends: 180 [2022-11-02 20:53:58,530 INFO L226 Difference]: Without dead ends: 180 [2022-11-02 20:53:58,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:53:58,531 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 390 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:53:58,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 666 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 314 Invalid, 0 Unknown, 132 Unchecked, 1.5s Time] [2022-11-02 20:53:58,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-02 20:53:58,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 90. [2022-11-02 20:53:58,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 67 states have (on average 1.537313432835821) internal successors, (103), 86 states have internal predecessors, (103), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:53:58,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2022-11-02 20:53:58,538 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 17 [2022-11-02 20:53:58,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:53:58,539 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2022-11-02 20:53:58,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:53:58,539 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2022-11-02 20:53:58,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-02 20:53:58,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:53:58,540 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:58,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:58,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:53:58,741 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:53:58,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:58,741 INFO L85 PathProgramCache]: Analyzing trace with hash 740047555, now seen corresponding path program 1 times [2022-11-02 20:53:58,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:53:58,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1922440303] [2022-11-02 20:53:58,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:58,741 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:53:58,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:53:58,742 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:53:58,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-02 20:53:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:58,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:53:58,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:58,820 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 [2022-11-02 20:53:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:53:58,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:53:58,879 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:53:58,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1922440303] [2022-11-02 20:53:58,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1922440303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:53:58,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:53:58,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:53:58,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518222182] [2022-11-02 20:53:58,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:53:58,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:53:58,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:53:58,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:53:58,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:53:58,881 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-11-02 20:53:59,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:53:59,099 INFO L93 Difference]: Finished difference Result 100 states and 119 transitions. [2022-11-02 20:53:59,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:53:59,099 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 22 [2022-11-02 20:53:59,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:53:59,100 INFO L225 Difference]: With dead ends: 100 [2022-11-02 20:53:59,100 INFO L226 Difference]: Without dead ends: 100 [2022-11-02 20:53:59,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:53:59,101 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 33 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:53:59,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 218 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:53:59,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-02 20:53:59,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 91. [2022-11-02 20:53:59,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.5441176470588236) internal successors, (105), 87 states have internal predecessors, (105), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:53:59,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2022-11-02 20:53:59,107 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 22 [2022-11-02 20:53:59,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:53:59,107 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2022-11-02 20:53:59,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-11-02 20:53:59,107 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2022-11-02 20:53:59,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-02 20:53:59,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:53:59,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:59,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:59,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:53:59,309 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:53:59,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:59,309 INFO L85 PathProgramCache]: Analyzing trace with hash 740047556, now seen corresponding path program 1 times [2022-11-02 20:53:59,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:53:59,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436244994] [2022-11-02 20:53:59,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:59,310 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:53:59,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:53:59,311 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:53:59,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-02 20:53:59,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:59,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-02 20:53:59,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:59,451 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 [2022-11-02 20:53:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:59,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:00,889 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:54:00,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436244994] [2022-11-02 20:54:00,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436244994] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:00,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:54:00,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 16 [2022-11-02 20:54:00,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116951923] [2022-11-02 20:54:00,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:00,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:54:00,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:54:00,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:54:00,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:54:00,892 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2022-11-02 20:54:01,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:01,941 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2022-11-02 20:54:01,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:54:01,942 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 22 [2022-11-02 20:54:01,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:01,943 INFO L225 Difference]: With dead ends: 108 [2022-11-02 20:54:01,943 INFO L226 Difference]: Without dead ends: 108 [2022-11-02 20:54:01,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:54:01,944 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 138 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:01,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 256 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 111 Invalid, 0 Unknown, 38 Unchecked, 0.7s Time] [2022-11-02 20:54:01,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-02 20:54:01,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 91. [2022-11-02 20:54:01,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.5294117647058822) internal successors, (104), 87 states have internal predecessors, (104), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:54:01,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2022-11-02 20:54:01,955 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 22 [2022-11-02 20:54:01,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:01,955 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2022-11-02 20:54:01,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2022-11-02 20:54:01,956 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2022-11-02 20:54:01,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-02 20:54:01,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:01,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:01,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:02,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:54:02,165 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:54:02,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:02,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1466637803, now seen corresponding path program 1 times [2022-11-02 20:54:02,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:54:02,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588378958] [2022-11-02 20:54:02,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:02,166 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:54:02,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:54:02,167 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:54:02,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-02 20:54:02,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:02,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:54:02,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:02,273 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 11 treesize of output 7 [2022-11-02 20:54:02,331 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 [2022-11-02 20:54:02,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:02,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:02,389 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 14 treesize of output 12 [2022-11-02 20:54:02,394 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 18 treesize of output 16 [2022-11-02 20:54:02,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:02,422 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:54:02,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588378958] [2022-11-02 20:54:02,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1588378958] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:02,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:54:02,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2022-11-02 20:54:02,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107666707] [2022-11-02 20:54:02,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:02,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:54:02,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:54:02,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:54:02,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:54:02,423 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 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) [2022-11-02 20:54:02,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:02,792 INFO L93 Difference]: Finished difference Result 159 states and 183 transitions. [2022-11-02 20:54:02,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:54:02,793 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 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 23 [2022-11-02 20:54:02,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:02,794 INFO L225 Difference]: With dead ends: 159 [2022-11-02 20:54:02,794 INFO L226 Difference]: Without dead ends: 159 [2022-11-02 20:54:02,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:54:02,795 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 92 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:02,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 299 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:54:02,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-11-02 20:54:02,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 108. [2022-11-02 20:54:02,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 84 states have (on average 1.5714285714285714) internal successors, (132), 103 states have internal predecessors, (132), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-02 20:54:02,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 140 transitions. [2022-11-02 20:54:02,801 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 140 transitions. Word has length 23 [2022-11-02 20:54:02,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:02,802 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 140 transitions. [2022-11-02 20:54:02,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 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) [2022-11-02 20:54:02,802 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 140 transitions. [2022-11-02 20:54:02,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-02 20:54:02,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:02,803 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:02,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:03,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:54:03,018 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:54:03,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:03,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1828515846, now seen corresponding path program 2 times [2022-11-02 20:54:03,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:54:03,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [328314079] [2022-11-02 20:54:03,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:54:03,019 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:54:03,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:54:03,020 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:54:03,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-02 20:54:03,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:54:03,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:54:03,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-02 20:54:03,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:03,147 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 [2022-11-02 20:54:03,851 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:03,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:07,115 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:54:07,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [328314079] [2022-11-02 20:54:07,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [328314079] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:07,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:54:07,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2022-11-02 20:54:07,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965865305] [2022-11-02 20:54:07,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:07,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:54:07,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:54:07,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:54:07,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:54:07,118 INFO L87 Difference]: Start difference. First operand 108 states and 140 transitions. Second operand has 28 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:54:11,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:54:13,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:54:16,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:54:20,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:20,887 INFO L93 Difference]: Finished difference Result 354 states and 426 transitions. [2022-11-02 20:54:20,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-02 20:54:20,887 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-11-02 20:54:20,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:20,889 INFO L225 Difference]: With dead ends: 354 [2022-11-02 20:54:20,890 INFO L226 Difference]: Without dead ends: 354 [2022-11-02 20:54:20,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=522, Invalid=1928, Unknown=0, NotChecked=0, Total=2450 [2022-11-02 20:54:20,891 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 1036 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 83 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 1198 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:20,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1036 Valid, 1198 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 810 Invalid, 2 Unknown, 183 Unchecked, 9.8s Time] [2022-11-02 20:54:20,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-11-02 20:54:20,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 120. [2022-11-02 20:54:20,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 96 states have (on average 1.5416666666666667) internal successors, (148), 115 states have internal predecessors, (148), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-02 20:54:20,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 156 transitions. [2022-11-02 20:54:20,899 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 156 transitions. Word has length 23 [2022-11-02 20:54:20,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:20,900 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 156 transitions. [2022-11-02 20:54:20,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:54:20,900 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 156 transitions. [2022-11-02 20:54:20,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-02 20:54:20,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:20,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:20,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:21,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:54:21,113 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:54:21,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:21,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1778913965, now seen corresponding path program 1 times [2022-11-02 20:54:21,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:54:21,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011572181] [2022-11-02 20:54:21,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:21,114 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:54:21,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:54:21,115 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:54:21,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-02 20:54:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:21,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:54:21,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:21,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:54:21,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:54:21,335 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:54:21,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2011572181] [2022-11-02 20:54:21,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2011572181] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:21,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:54:21,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:54:21,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788963154] [2022-11-02 20:54:21,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:21,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:54:21,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:54:21,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:54:21,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:54:21,338 INFO L87 Difference]: Start difference. First operand 120 states and 156 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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) [2022-11-02 20:54:21,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:21,448 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2022-11-02 20:54:21,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:54:21,450 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 24 [2022-11-02 20:54:21,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:21,451 INFO L225 Difference]: With dead ends: 119 [2022-11-02 20:54:21,451 INFO L226 Difference]: Without dead ends: 119 [2022-11-02 20:54:21,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:54:21,452 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 60 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:21,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 162 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:54:21,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-02 20:54:21,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-11-02 20:54:21,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 96 states have (on average 1.5208333333333333) internal successors, (146), 114 states have internal predecessors, (146), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-02 20:54:21,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 154 transitions. [2022-11-02 20:54:21,458 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 154 transitions. Word has length 24 [2022-11-02 20:54:21,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:21,458 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 154 transitions. [2022-11-02 20:54:21,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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) [2022-11-02 20:54:21,459 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 154 transitions. [2022-11-02 20:54:21,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-02 20:54:21,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:21,460 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:21,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:21,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:54:21,671 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:54:21,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:21,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1778868221, now seen corresponding path program 1 times [2022-11-02 20:54:21,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:54:21,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [161058737] [2022-11-02 20:54:21,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:21,672 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:54:21,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:54:21,673 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:54:21,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-02 20:54:21,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:21,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:54:21,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:21,809 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 11 treesize of output 7 [2022-11-02 20:54:21,881 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 [2022-11-02 20:54:21,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:21,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:21,997 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 14 treesize of output 12 [2022-11-02 20:54:21,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-02 20:54:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:22,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:54:22,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [161058737] [2022-11-02 20:54:22,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [161058737] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:22,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:54:22,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-11-02 20:54:22,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874921026] [2022-11-02 20:54:22,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:22,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:54:22,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:54:22,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:54:22,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:54:22,049 INFO L87 Difference]: Start difference. First operand 119 states and 154 transitions. Second operand has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:54:22,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:22,642 INFO L93 Difference]: Finished difference Result 166 states and 191 transitions. [2022-11-02 20:54:22,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:54:22,643 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-11-02 20:54:22,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:22,644 INFO L225 Difference]: With dead ends: 166 [2022-11-02 20:54:22,644 INFO L226 Difference]: Without dead ends: 166 [2022-11-02 20:54:22,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:54:22,645 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 130 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:22,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 360 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:54:22,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-02 20:54:22,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 123. [2022-11-02 20:54:22,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 100 states have (on average 1.5) internal successors, (150), 118 states have internal predecessors, (150), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-02 20:54:22,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 158 transitions. [2022-11-02 20:54:22,651 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 158 transitions. Word has length 24 [2022-11-02 20:54:22,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:22,651 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 158 transitions. [2022-11-02 20:54:22,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:54:22,651 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 158 transitions. [2022-11-02 20:54:22,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 20:54:22,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:22,652 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] [2022-11-02 20:54:22,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:22,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:54:22,864 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:54:22,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:22,864 INFO L85 PathProgramCache]: Analyzing trace with hash -878858933, now seen corresponding path program 1 times [2022-11-02 20:54:22,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:54:22,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449498913] [2022-11-02 20:54:22,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:22,865 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:54:22,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:54:22,866 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:54:22,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-02 20:54:22,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:22,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:54:22,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:22,955 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 [2022-11-02 20:54:23,060 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-02 20:54:23,060 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 [2022-11-02 20:54:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:54:23,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:23,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:54:23,252 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:54:23,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449498913] [2022-11-02 20:54:23,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449498913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:23,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:54:23,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2022-11-02 20:54:23,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087491560] [2022-11-02 20:54:23,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:23,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:54:23,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:54:23,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:54:23,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:54:23,254 INFO L87 Difference]: Start difference. First operand 123 states and 158 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:54:23,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:23,601 INFO L93 Difference]: Finished difference Result 187 states and 237 transitions. [2022-11-02 20:54:23,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:54:23,602 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-11-02 20:54:23,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:23,604 INFO L225 Difference]: With dead ends: 187 [2022-11-02 20:54:23,604 INFO L226 Difference]: Without dead ends: 187 [2022-11-02 20:54:23,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:54:23,610 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 84 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:23,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 429 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 193 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2022-11-02 20:54:23,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-02 20:54:23,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 142. [2022-11-02 20:54:23,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 120 states have (on average 1.4666666666666666) internal successors, (176), 135 states have internal predecessors, (176), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-02 20:54:23,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 187 transitions. [2022-11-02 20:54:23,627 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 187 transitions. Word has length 26 [2022-11-02 20:54:23,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:23,627 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 187 transitions. [2022-11-02 20:54:23,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:54:23,628 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 187 transitions. [2022-11-02 20:54:23,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 20:54:23,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:23,633 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] [2022-11-02 20:54:23,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:23,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:54:23,846 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:54:23,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:23,846 INFO L85 PathProgramCache]: Analyzing trace with hash -878858932, now seen corresponding path program 1 times [2022-11-02 20:54:23,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:54:23,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776554116] [2022-11-02 20:54:23,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:23,847 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:54:23,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:54:23,848 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:54:23,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-02 20:54:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:23,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-02 20:54:23,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:23,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:54:28,565 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-02 20:54:28,565 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 16 [2022-11-02 20:54:28,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:28,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:29,297 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:54:29,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776554116] [2022-11-02 20:54:29,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776554116] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:29,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [640194425] [2022-11-02 20:54:29,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:29,297 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 20:54:29,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 20:54:29,300 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 20:54:29,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-02 20:54:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:29,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-02 20:54:29,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:29,460 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 [2022-11-02 20:54:29,469 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 [2022-11-02 20:54:32,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:54:32,394 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 [2022-11-02 20:54:32,405 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 20:54:32,405 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 [2022-11-02 20:54:32,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:32,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:37,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [640194425] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:37,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:54:37,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2022-11-02 20:54:37,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140851438] [2022-11-02 20:54:37,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:37,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-02 20:54:37,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:54:37,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-02 20:54:37,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=659, Unknown=5, NotChecked=0, Total=756 [2022-11-02 20:54:37,597 INFO L87 Difference]: Start difference. First operand 142 states and 187 transitions. Second operand has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:54:40,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:40,490 INFO L93 Difference]: Finished difference Result 149 states and 198 transitions. [2022-11-02 20:54:40,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:54:40,491 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2022-11-02 20:54:40,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:40,492 INFO L225 Difference]: With dead ends: 149 [2022-11-02 20:54:40,492 INFO L226 Difference]: Without dead ends: 149 [2022-11-02 20:54:40,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=125, Invalid=925, Unknown=6, NotChecked=0, Total=1056 [2022-11-02 20:54:40,493 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 38 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:40,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 789 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 300 Invalid, 0 Unknown, 197 Unchecked, 0.6s Time] [2022-11-02 20:54:40,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-02 20:54:40,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2022-11-02 20:54:40,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 125 states have (on average 1.464) internal successors, (183), 140 states have internal predecessors, (183), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-02 20:54:40,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 197 transitions. [2022-11-02 20:54:40,500 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 197 transitions. Word has length 26 [2022-11-02 20:54:40,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:40,500 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 197 transitions. [2022-11-02 20:54:40,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:54:40,501 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 197 transitions. [2022-11-02 20:54:40,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 20:54:40,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:40,502 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] [2022-11-02 20:54:40,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:40,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2022-11-02 20:54:40,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt [2022-11-02 20:54:40,914 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:54:40,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:40,914 INFO L85 PathProgramCache]: Analyzing trace with hash -850229781, now seen corresponding path program 1 times [2022-11-02 20:54:40,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:54:40,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1076343588] [2022-11-02 20:54:40,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:40,915 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:54:40,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:54:40,916 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:54:40,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-02 20:54:40,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:40,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:54:40,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:54:41,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:54:41,049 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:54:41,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1076343588] [2022-11-02 20:54:41,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1076343588] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:41,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:54:41,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:54:41,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533242021] [2022-11-02 20:54:41,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:41,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:54:41,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:54:41,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:54:41,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:54:41,050 INFO L87 Difference]: Start difference. First operand 148 states and 197 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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) [2022-11-02 20:54:41,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:41,088 INFO L93 Difference]: Finished difference Result 161 states and 202 transitions. [2022-11-02 20:54:41,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:54:41,090 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 26 [2022-11-02 20:54:41,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:41,091 INFO L225 Difference]: With dead ends: 161 [2022-11-02 20:54:41,092 INFO L226 Difference]: Without dead ends: 161 [2022-11-02 20:54:41,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:54:41,092 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 37 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:41,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 312 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:54:41,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-02 20:54:41,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2022-11-02 20:54:41,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 116 states have (on average 1.4482758620689655) internal successors, (168), 130 states have internal predecessors, (168), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-02 20:54:41,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 179 transitions. [2022-11-02 20:54:41,102 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 179 transitions. Word has length 26 [2022-11-02 20:54:41,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:41,103 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 179 transitions. [2022-11-02 20:54:41,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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) [2022-11-02 20:54:41,104 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 179 transitions. [2022-11-02 20:54:41,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:54:41,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:41,106 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:41,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:41,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:54:41,323 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:54:41,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:41,323 INFO L85 PathProgramCache]: Analyzing trace with hash -24310932, now seen corresponding path program 1 times [2022-11-02 20:54:41,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:54:41,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [419965350] [2022-11-02 20:54:41,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:41,324 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:54:41,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:54:41,325 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:54:41,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-02 20:54:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:41,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:54:41,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:41,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:41,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:41,681 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:54:41,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [419965350] [2022-11-02 20:54:41,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [419965350] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:41,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:54:41,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2022-11-02 20:54:41,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366644591] [2022-11-02 20:54:41,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:41,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:54:41,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:54:41,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:54:41,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:54:41,687 INFO L87 Difference]: Start difference. First operand 138 states and 179 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 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) [2022-11-02 20:54:42,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:42,199 INFO L93 Difference]: Finished difference Result 262 states and 306 transitions. [2022-11-02 20:54:42,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:54:42,200 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 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 [2022-11-02 20:54:42,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:42,202 INFO L225 Difference]: With dead ends: 262 [2022-11-02 20:54:42,202 INFO L226 Difference]: Without dead ends: 262 [2022-11-02 20:54:42,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:54:42,203 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 767 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:42,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [767 Valid, 368 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:54:42,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-11-02 20:54:42,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 121. [2022-11-02 20:54:42,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 99 states have (on average 1.4343434343434343) internal successors, (142), 113 states have internal predecessors, (142), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-02 20:54:42,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 153 transitions. [2022-11-02 20:54:42,209 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 153 transitions. Word has length 27 [2022-11-02 20:54:42,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:42,210 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 153 transitions. [2022-11-02 20:54:42,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 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) [2022-11-02 20:54:42,210 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 153 transitions. [2022-11-02 20:54:42,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:54:42,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:42,212 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] [2022-11-02 20:54:42,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:42,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:54:42,421 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:54:42,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:42,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1525074233, now seen corresponding path program 1 times [2022-11-02 20:54:42,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:54:42,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1709923773] [2022-11-02 20:54:42,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:42,422 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:54:42,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:54:42,425 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:54:42,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-02 20:54:42,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:42,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:54:42,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:42,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:54:42,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:54:42,515 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:54:42,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1709923773] [2022-11-02 20:54:42,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1709923773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:42,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:54:42,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:54:42,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876022074] [2022-11-02 20:54:42,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:42,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:54:42,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:54:42,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:54:42,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:54:42,520 INFO L87 Difference]: Start difference. First operand 121 states and 153 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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) [2022-11-02 20:54:42,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:42,579 INFO L93 Difference]: Finished difference Result 141 states and 170 transitions. [2022-11-02 20:54:42,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:54:42,579 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 28 [2022-11-02 20:54:42,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:42,580 INFO L225 Difference]: With dead ends: 141 [2022-11-02 20:54:42,580 INFO L226 Difference]: Without dead ends: 141 [2022-11-02 20:54:42,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:54:42,581 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 28 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:42,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 258 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:54:42,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-02 20:54:42,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 118. [2022-11-02 20:54:42,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 96 states have (on average 1.4166666666666667) internal successors, (136), 111 states have internal predecessors, (136), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-02 20:54:42,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 147 transitions. [2022-11-02 20:54:42,586 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 147 transitions. Word has length 28 [2022-11-02 20:54:42,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:42,586 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 147 transitions. [2022-11-02 20:54:42,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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) [2022-11-02 20:54:42,587 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 147 transitions. [2022-11-02 20:54:42,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:54:42,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:42,588 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, 1, 1] [2022-11-02 20:54:42,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:42,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:54:42,797 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:54:42,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:42,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1027082728, now seen corresponding path program 1 times [2022-11-02 20:54:42,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:54:42,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1430079424] [2022-11-02 20:54:42,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:42,798 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:54:42,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:54:42,800 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:54:42,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-02 20:54:42,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:42,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:54:42,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:42,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:54:42,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:54:42,896 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:54:42,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1430079424] [2022-11-02 20:54:42,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1430079424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:42,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:54:42,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:54:42,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675966830] [2022-11-02 20:54:42,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:42,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:54:42,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:54:42,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:54:42,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:54:42,898 INFO L87 Difference]: Start difference. First operand 118 states and 147 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2022-11-02 20:54:42,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:42,995 INFO L93 Difference]: Finished difference Result 133 states and 153 transitions. [2022-11-02 20:54:42,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:54:42,995 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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 28 [2022-11-02 20:54:42,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:42,996 INFO L225 Difference]: With dead ends: 133 [2022-11-02 20:54:42,996 INFO L226 Difference]: Without dead ends: 133 [2022-11-02 20:54:42,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:54:42,997 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 50 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:42,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 201 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:54:42,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-02 20:54:43,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 108. [2022-11-02 20:54:43,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 86 states have (on average 1.3604651162790697) internal successors, (117), 101 states have internal predecessors, (117), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-02 20:54:43,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 128 transitions. [2022-11-02 20:54:43,002 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 128 transitions. Word has length 28 [2022-11-02 20:54:43,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:43,002 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 128 transitions. [2022-11-02 20:54:43,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2022-11-02 20:54:43,003 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 128 transitions. [2022-11-02 20:54:43,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-02 20:54:43,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:43,003 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:43,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:43,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:54:43,215 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:54:43,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:43,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1822208300, now seen corresponding path program 2 times [2022-11-02 20:54:43,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:54:43,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621570616] [2022-11-02 20:54:43,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:54:43,216 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:54:43,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:54:43,218 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:54:43,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-02 20:54:43,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:54:43,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:54:43,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:54:43,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:43,380 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 [2022-11-02 20:54:43,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:54:46,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:54:46,251 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 21 treesize of output 21 [2022-11-02 20:54:46,261 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 20:54:46,262 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 [2022-11-02 20:54:46,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:46,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:49,125 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:54:49,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621570616] [2022-11-02 20:54:49,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621570616] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:49,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [520305829] [2022-11-02 20:54:49,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:54:49,126 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 20:54:49,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 20:54:49,127 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 20:54:49,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-02 20:54:49,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:54:49,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:54:49,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:54:49,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:49,322 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 [2022-11-02 20:54:49,328 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 [2022-11-02 20:54:49,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:54:49,796 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 21 treesize of output 21 [2022-11-02 20:54:49,822 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 20:54:49,822 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 [2022-11-02 20:54:49,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:49,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:50,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [520305829] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:50,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:54:50,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2022-11-02 20:54:50,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370227621] [2022-11-02 20:54:50,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:50,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:54:50,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:54:50,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:54:50,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=319, Unknown=2, NotChecked=0, Total=380 [2022-11-02 20:54:50,425 INFO L87 Difference]: Start difference. First operand 108 states and 128 transitions. Second operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 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) [2022-11-02 20:54:51,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:51,424 INFO L93 Difference]: Finished difference Result 168 states and 192 transitions. [2022-11-02 20:54:51,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:54:51,429 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 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 29 [2022-11-02 20:54:51,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:51,431 INFO L225 Difference]: With dead ends: 168 [2022-11-02 20:54:51,431 INFO L226 Difference]: Without dead ends: 168 [2022-11-02 20:54:51,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=85, Invalid=513, Unknown=2, NotChecked=0, Total=600 [2022-11-02 20:54:51,432 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 85 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:51,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 825 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 423 Invalid, 0 Unknown, 193 Unchecked, 0.7s Time] [2022-11-02 20:54:51,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-02 20:54:51,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 120. [2022-11-02 20:54:51,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 97 states have (on average 1.3298969072164948) internal successors, (129), 112 states have internal predecessors, (129), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-02 20:54:51,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 143 transitions. [2022-11-02 20:54:51,437 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 143 transitions. Word has length 29 [2022-11-02 20:54:51,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:51,438 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 143 transitions. [2022-11-02 20:54:51,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 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) [2022-11-02 20:54:51,438 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 143 transitions. [2022-11-02 20:54:51,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-02 20:54:51,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:51,439 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, 1, 1, 1, 1, 1] [2022-11-02 20:54:51,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2022-11-02 20:54:51,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:51,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:54:51,842 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:54:51,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:51,842 INFO L85 PathProgramCache]: Analyzing trace with hash -475836742, now seen corresponding path program 1 times [2022-11-02 20:54:51,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:54:51,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293589285] [2022-11-02 20:54:51,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:51,843 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:54:51,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:54:51,843 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:54:51,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-02 20:54:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:51,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:54:51,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:51,932 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 [2022-11-02 20:54:52,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:54:52,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:54:52,155 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:54:52,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1293589285] [2022-11-02 20:54:52,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1293589285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:52,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:54:52,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-11-02 20:54:52,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924297118] [2022-11-02 20:54:52,156 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:52,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:54:52,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:54:52,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:54:52,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:54:52,157 INFO L87 Difference]: Start difference. First operand 120 states and 143 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:54:52,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:52,415 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2022-11-02 20:54:52,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:54:52,416 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-11-02 20:54:52,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:52,416 INFO L225 Difference]: With dead ends: 126 [2022-11-02 20:54:52,417 INFO L226 Difference]: Without dead ends: 126 [2022-11-02 20:54:52,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:54:52,418 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 26 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:52,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 275 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2022-11-02 20:54:52,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-02 20:54:52,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2022-11-02 20:54:52,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 100 states have (on average 1.32) internal successors, (132), 115 states have internal predecessors, (132), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-02 20:54:52,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 146 transitions. [2022-11-02 20:54:52,423 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 146 transitions. Word has length 31 [2022-11-02 20:54:52,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:52,423 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 146 transitions. [2022-11-02 20:54:52,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:54:52,423 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 146 transitions. [2022-11-02 20:54:52,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-02 20:54:52,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:52,424 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, 1, 1, 1, 1, 1] [2022-11-02 20:54:52,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:52,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:54:52,633 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:54:52,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:52,633 INFO L85 PathProgramCache]: Analyzing trace with hash -475836741, now seen corresponding path program 1 times [2022-11-02 20:54:52,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:54:52,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1430577798] [2022-11-02 20:54:52,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:52,634 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:54:52,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:54:52,635 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:54:52,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-02 20:54:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:52,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-02 20:54:52,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:52,759 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 [2022-11-02 20:54:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:53,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:54,504 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:54:54,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1430577798] [2022-11-02 20:54:54,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1430577798] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:54,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:54:54,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 18 [2022-11-02 20:54:54,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544771584] [2022-11-02 20:54:54,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:54,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:54:54,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:54:54,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:54:54,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:54:54,506 INFO L87 Difference]: Start difference. First operand 124 states and 146 transitions. Second operand has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:54:55,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:55,582 INFO L93 Difference]: Finished difference Result 144 states and 169 transitions. [2022-11-02 20:54:55,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:54:55,585 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 31 [2022-11-02 20:54:55,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:55,586 INFO L225 Difference]: With dead ends: 144 [2022-11-02 20:54:55,586 INFO L226 Difference]: Without dead ends: 144 [2022-11-02 20:54:55,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:54:55,587 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 44 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:55,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 576 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 196 Invalid, 0 Unknown, 77 Unchecked, 0.8s Time] [2022-11-02 20:54:55,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-02 20:54:55,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 124. [2022-11-02 20:54:55,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 100 states have (on average 1.31) internal successors, (131), 115 states have internal predecessors, (131), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-02 20:54:55,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 145 transitions. [2022-11-02 20:54:55,592 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 145 transitions. Word has length 31 [2022-11-02 20:54:55,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:55,593 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 145 transitions. [2022-11-02 20:54:55,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:54:55,593 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 145 transitions. [2022-11-02 20:54:55,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-02 20:54:55,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:55,594 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, 1, 1, 1, 1] [2022-11-02 20:54:55,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-11-02 20:54:55,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:54:55,805 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:54:55,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:55,806 INFO L85 PathProgramCache]: Analyzing trace with hash 818465468, now seen corresponding path program 1 times [2022-11-02 20:54:55,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:54:55,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890862073] [2022-11-02 20:54:55,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:55,806 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:54:55,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:54:55,807 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:54:55,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-02 20:54:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:55,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:54:55,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:54:55,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:55,991 INFO L356 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-02 20:54:55,992 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 16 treesize of output 15 [2022-11-02 20:54:56,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:54:56,013 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:54:56,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890862073] [2022-11-02 20:54:56,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890862073] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:56,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:54:56,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-11-02 20:54:56,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651189161] [2022-11-02 20:54:56,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:56,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:54:56,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:54:56,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:54:56,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:54:56,014 INFO L87 Difference]: Start difference. First operand 124 states and 145 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 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) [2022-11-02 20:54:56,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:56,276 INFO L93 Difference]: Finished difference Result 143 states and 166 transitions. [2022-11-02 20:54:56,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:54:56,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 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 32 [2022-11-02 20:54:56,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:56,278 INFO L225 Difference]: With dead ends: 143 [2022-11-02 20:54:56,278 INFO L226 Difference]: Without dead ends: 143 [2022-11-02 20:54:56,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:54:56,279 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 82 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:56,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 151 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:54:56,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-02 20:54:56,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 129. [2022-11-02 20:54:56,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 105 states have (on average 1.3238095238095238) internal successors, (139), 120 states have internal predecessors, (139), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-02 20:54:56,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 153 transitions. [2022-11-02 20:54:56,283 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 153 transitions. Word has length 32 [2022-11-02 20:54:56,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:56,284 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 153 transitions. [2022-11-02 20:54:56,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 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) [2022-11-02 20:54:56,284 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 153 transitions. [2022-11-02 20:54:56,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-02 20:54:56,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:56,285 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, 1, 1, 1, 1] [2022-11-02 20:54:56,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:56,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:54:56,498 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:54:56,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:56,498 INFO L85 PathProgramCache]: Analyzing trace with hash 818465469, now seen corresponding path program 1 times [2022-11-02 20:54:56,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:54:56,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959652238] [2022-11-02 20:54:56,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:56,498 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:54:56,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:54:56,499 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:54:56,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-02 20:54:56,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:56,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:54:56,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:56,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:54:56,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:57,028 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:54:57,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-11-02 20:54:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:54:57,490 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:54:57,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959652238] [2022-11-02 20:54:57,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959652238] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:57,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:54:57,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-02 20:54:57,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177512250] [2022-11-02 20:54:57,490 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:57,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:54:57,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:54:57,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:54:57,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:54:57,492 INFO L87 Difference]: Start difference. First operand 129 states and 153 transitions. Second operand has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:55:00,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:00,111 INFO L93 Difference]: Finished difference Result 280 states and 311 transitions. [2022-11-02 20:55:00,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:55:00,112 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-11-02 20:55:00,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:00,113 INFO L225 Difference]: With dead ends: 280 [2022-11-02 20:55:00,113 INFO L226 Difference]: Without dead ends: 280 [2022-11-02 20:55:00,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:55:00,114 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 325 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:00,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 445 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-02 20:55:00,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-11-02 20:55:00,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 143. [2022-11-02 20:55:00,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 120 states have (on average 1.3666666666666667) internal successors, (164), 132 states have internal predecessors, (164), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-02 20:55:00,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 178 transitions. [2022-11-02 20:55:00,120 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 178 transitions. Word has length 32 [2022-11-02 20:55:00,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:00,121 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 178 transitions. [2022-11-02 20:55:00,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:55:00,121 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 178 transitions. [2022-11-02 20:55:00,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-02 20:55:00,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:00,122 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:00,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:00,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:00,334 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:55:00,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:00,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1191141044, now seen corresponding path program 3 times [2022-11-02 20:55:00,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:00,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [951579965] [2022-11-02 20:55:00,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:55:00,335 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:00,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:00,336 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:00,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-02 20:55:00,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:55:00,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:55:00,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-02 20:55:00,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:00,455 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 [2022-11-02 20:55:00,466 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 [2022-11-02 20:55:03,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:55:03,063 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 [2022-11-02 20:55:03,076 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 20:55:03,077 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 [2022-11-02 20:55:03,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:55:03,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:03,777 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:03,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [951579965] [2022-11-02 20:55:03,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [951579965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:03,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1662065152] [2022-11-02 20:55:03,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:55:03,778 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 20:55:03,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 20:55:03,785 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 20:55:03,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-02 20:55:03,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:55:03,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:55:03,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-02 20:55:03,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:03,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-02 20:55:03,958 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 [2022-11-02 20:55:04,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:55:04,371 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 [2022-11-02 20:55:04,381 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 20:55:04,381 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 [2022-11-02 20:55:04,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:55:04,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:04,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1662065152] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:04,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:55:04,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2022-11-02 20:55:04,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875946781] [2022-11-02 20:55:04,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:04,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:55:04,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:04,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:55:04,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=177, Unknown=1, NotChecked=0, Total=210 [2022-11-02 20:55:04,831 INFO L87 Difference]: Start difference. First operand 143 states and 178 transitions. Second operand has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 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) [2022-11-02 20:55:05,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:05,167 INFO L93 Difference]: Finished difference Result 143 states and 177 transitions. [2022-11-02 20:55:05,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:55:05,168 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 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 32 [2022-11-02 20:55:05,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:05,169 INFO L225 Difference]: With dead ends: 143 [2022-11-02 20:55:05,169 INFO L226 Difference]: Without dead ends: 143 [2022-11-02 20:55:05,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=51, Invalid=290, Unknown=1, NotChecked=0, Total=342 [2022-11-02 20:55:05,169 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 8 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:05,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 438 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 98 Unchecked, 0.2s Time] [2022-11-02 20:55:05,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-02 20:55:05,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2022-11-02 20:55:05,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 115 states have (on average 1.373913043478261) internal successors, (158), 127 states have internal predecessors, (158), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-02 20:55:05,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 169 transitions. [2022-11-02 20:55:05,174 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 169 transitions. Word has length 32 [2022-11-02 20:55:05,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:05,174 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 169 transitions. [2022-11-02 20:55:05,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 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) [2022-11-02 20:55:05,175 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 169 transitions. [2022-11-02 20:55:05,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-02 20:55:05,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:05,175 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, 1, 1, 1, 1, 1] [2022-11-02 20:55:05,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:05,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:05,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:05,576 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:55:05,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:05,576 INFO L85 PathProgramCache]: Analyzing trace with hash -397374190, now seen corresponding path program 1 times [2022-11-02 20:55:05,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:05,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051800195] [2022-11-02 20:55:05,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:05,577 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:05,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:05,578 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:05,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-02 20:55:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:05,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 20:55:05,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:05,783 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 11 treesize of output 7 [2022-11-02 20:55:05,835 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 [2022-11-02 20:55:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:55:05,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:05,917 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 36 treesize of output 32 [2022-11-02 20:55:06,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:55:06,167 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:06,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051800195] [2022-11-02 20:55:06,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051800195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:06,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:55:06,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-11-02 20:55:06,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280898378] [2022-11-02 20:55:06,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:06,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:55:06,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:06,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:55:06,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:55:06,169 INFO L87 Difference]: Start difference. First operand 137 states and 169 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:55:07,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:07,113 INFO L93 Difference]: Finished difference Result 214 states and 240 transitions. [2022-11-02 20:55:07,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:55:07,114 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-11-02 20:55:07,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:07,116 INFO L225 Difference]: With dead ends: 214 [2022-11-02 20:55:07,116 INFO L226 Difference]: Without dead ends: 214 [2022-11-02 20:55:07,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:55:07,116 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 109 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:07,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 640 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 20:55:07,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-02 20:55:07,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 146. [2022-11-02 20:55:07,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 124 states have (on average 1.3790322580645162) internal successors, (171), 136 states have internal predecessors, (171), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-02 20:55:07,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 182 transitions. [2022-11-02 20:55:07,122 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 182 transitions. Word has length 33 [2022-11-02 20:55:07,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:07,123 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 182 transitions. [2022-11-02 20:55:07,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:55:07,123 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 182 transitions. [2022-11-02 20:55:07,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-02 20:55:07,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:07,124 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, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:07,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:07,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:07,329 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:55:07,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:07,329 INFO L85 PathProgramCache]: Analyzing trace with hash 566302140, now seen corresponding path program 1 times [2022-11-02 20:55:07,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:07,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649318977] [2022-11-02 20:55:07,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:07,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:07,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:07,331 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:07,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-02 20:55:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:07,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:55:07,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:07,840 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 11 treesize of output 7 [2022-11-02 20:55:08,017 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 [2022-11-02 20:55:08,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:55:08,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:08,225 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 36 treesize of output 32 [2022-11-02 20:55:08,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:55:08,606 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:08,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649318977] [2022-11-02 20:55:08,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649318977] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:08,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:55:08,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 17 [2022-11-02 20:55:08,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116690639] [2022-11-02 20:55:08,607 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:08,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:55:08,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:08,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:55:08,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:55:08,608 INFO L87 Difference]: Start difference. First operand 146 states and 182 transitions. Second operand has 18 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:55:08,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:08,962 INFO L93 Difference]: Finished difference Result 181 states and 221 transitions. [2022-11-02 20:55:08,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:55:08,965 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2022-11-02 20:55:08,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:08,966 INFO L225 Difference]: With dead ends: 181 [2022-11-02 20:55:08,966 INFO L226 Difference]: Without dead ends: 179 [2022-11-02 20:55:08,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:55:08,967 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 45 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:08,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 653 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 130 Invalid, 0 Unknown, 193 Unchecked, 0.3s Time] [2022-11-02 20:55:08,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-11-02 20:55:08,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 155. [2022-11-02 20:55:08,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 132 states have (on average 1.3636363636363635) internal successors, (180), 144 states have internal predecessors, (180), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-02 20:55:08,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 191 transitions. [2022-11-02 20:55:08,973 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 191 transitions. Word has length 34 [2022-11-02 20:55:08,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:08,973 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 191 transitions. [2022-11-02 20:55:08,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:55:08,974 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 191 transitions. [2022-11-02 20:55:08,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-02 20:55:08,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:08,975 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:08,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-02 20:55:09,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:09,187 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:55:09,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:09,187 INFO L85 PathProgramCache]: Analyzing trace with hash 375497300, now seen corresponding path program 1 times [2022-11-02 20:55:09,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:09,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1392295649] [2022-11-02 20:55:09,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:09,188 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:09,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:09,189 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:09,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-02 20:55:09,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:09,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 20:55:09,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:09,323 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 [2022-11-02 20:55:09,415 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 11 treesize of output 7 [2022-11-02 20:55:09,471 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 [2022-11-02 20:55:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:55:09,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:09,563 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 44 treesize of output 40 [2022-11-02 20:55:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:55:09,916 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:09,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1392295649] [2022-11-02 20:55:09,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1392295649] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:09,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:55:09,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-11-02 20:55:09,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525291462] [2022-11-02 20:55:09,917 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:09,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:55:09,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:09,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:55:09,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:55:09,918 INFO L87 Difference]: Start difference. First operand 155 states and 191 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:55:10,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:10,444 INFO L93 Difference]: Finished difference Result 183 states and 219 transitions. [2022-11-02 20:55:10,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:55:10,456 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2022-11-02 20:55:10,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:10,458 INFO L225 Difference]: With dead ends: 183 [2022-11-02 20:55:10,458 INFO L226 Difference]: Without dead ends: 183 [2022-11-02 20:55:10,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:55:10,459 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 54 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:10,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 349 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 197 Invalid, 0 Unknown, 125 Unchecked, 0.4s Time] [2022-11-02 20:55:10,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-02 20:55:10,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 150. [2022-11-02 20:55:10,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 127 states have (on average 1.3700787401574803) internal successors, (174), 139 states have internal predecessors, (174), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-02 20:55:10,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 185 transitions. [2022-11-02 20:55:10,465 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 185 transitions. Word has length 35 [2022-11-02 20:55:10,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:10,465 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 185 transitions. [2022-11-02 20:55:10,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:55:10,466 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 185 transitions. [2022-11-02 20:55:10,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 20:55:10,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:10,466 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:10,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:10,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:10,679 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:55:10,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:10,679 INFO L85 PathProgramCache]: Analyzing trace with hash -2027972411, now seen corresponding path program 1 times [2022-11-02 20:55:10,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:10,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660716586] [2022-11-02 20:55:10,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:10,680 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:10,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:10,681 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:10,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-02 20:55:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:10,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 20:55:10,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:55:11,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:11,293 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:55:11,293 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:11,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660716586] [2022-11-02 20:55:11,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660716586] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:11,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:55:11,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2022-11-02 20:55:11,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407076505] [2022-11-02 20:55:11,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:11,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:55:11,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:11,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:55:11,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:55:11,295 INFO L87 Difference]: Start difference. First operand 150 states and 185 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 20:55:12,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:12,020 INFO L93 Difference]: Finished difference Result 254 states and 296 transitions. [2022-11-02 20:55:12,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:55:12,024 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 36 [2022-11-02 20:55:12,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:12,025 INFO L225 Difference]: With dead ends: 254 [2022-11-02 20:55:12,025 INFO L226 Difference]: Without dead ends: 254 [2022-11-02 20:55:12,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:55:12,026 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 728 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:12,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 452 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:55:12,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-11-02 20:55:12,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 158. [2022-11-02 20:55:12,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 134 states have (on average 1.3507462686567164) internal successors, (181), 146 states have internal predecessors, (181), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-02 20:55:12,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 195 transitions. [2022-11-02 20:55:12,031 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 195 transitions. Word has length 36 [2022-11-02 20:55:12,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:12,032 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 195 transitions. [2022-11-02 20:55:12,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 20:55:12,032 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 195 transitions. [2022-11-02 20:55:12,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 20:55:12,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:12,032 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:12,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:12,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:12,245 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:55:12,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:12,245 INFO L85 PathProgramCache]: Analyzing trace with hash -185148971, now seen corresponding path program 1 times [2022-11-02 20:55:12,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:12,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523958048] [2022-11-02 20:55:12,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:12,246 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:12,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:12,247 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:12,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-02 20:55:12,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:12,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:55:12,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:12,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:55:12,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:55:12,674 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:12,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523958048] [2022-11-02 20:55:12,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523958048] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:12,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:55:12,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2022-11-02 20:55:12,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938051077] [2022-11-02 20:55:12,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:12,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:55:12,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:12,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:55:12,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:55:12,676 INFO L87 Difference]: Start difference. First operand 158 states and 195 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:55:13,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:13,104 INFO L93 Difference]: Finished difference Result 187 states and 219 transitions. [2022-11-02 20:55:13,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:55:13,105 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2022-11-02 20:55:13,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:13,106 INFO L225 Difference]: With dead ends: 187 [2022-11-02 20:55:13,106 INFO L226 Difference]: Without dead ends: 187 [2022-11-02 20:55:13,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:55:13,107 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 365 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:13,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 273 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:55:13,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-02 20:55:13,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 155. [2022-11-02 20:55:13,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 131 states have (on average 1.3206106870229009) internal successors, (173), 143 states have internal predecessors, (173), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-02 20:55:13,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 187 transitions. [2022-11-02 20:55:13,112 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 187 transitions. Word has length 36 [2022-11-02 20:55:13,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:13,113 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 187 transitions. [2022-11-02 20:55:13,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:55:13,113 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 187 transitions. [2022-11-02 20:55:13,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-02 20:55:13,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:13,113 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:13,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:13,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:13,314 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:55:13,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:13,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1645803514, now seen corresponding path program 3 times [2022-11-02 20:55:13,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:13,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258319668] [2022-11-02 20:55:13,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:55:13,315 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:13,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:13,316 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:13,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-02 20:55:13,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-02 20:55:13,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:55:13,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-02 20:55:13,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:13,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:55:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:14,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:18,260 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:18,261 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:18,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258319668] [2022-11-02 20:55:18,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258319668] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:18,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:55:18,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 31 [2022-11-02 20:55:18,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544184664] [2022-11-02 20:55:18,262 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:18,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-02 20:55:18,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:18,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-02 20:55:18,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2022-11-02 20:55:18,263 INFO L87 Difference]: Start difference. First operand 155 states and 187 transitions. Second operand has 32 states, 29 states have (on average 2.206896551724138) internal successors, (64), 30 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:55:35,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:35,101 INFO L93 Difference]: Finished difference Result 313 states and 398 transitions. [2022-11-02 20:55:35,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-02 20:55:35,102 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.206896551724138) internal successors, (64), 30 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2022-11-02 20:55:35,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:35,104 INFO L225 Difference]: With dead ends: 313 [2022-11-02 20:55:35,105 INFO L226 Difference]: Without dead ends: 313 [2022-11-02 20:55:35,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=1097, Invalid=4015, Unknown=0, NotChecked=0, Total=5112 [2022-11-02 20:55:35,106 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 430 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:35,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 1058 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1128 Invalid, 0 Unknown, 255 Unchecked, 4.6s Time] [2022-11-02 20:55:35,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-11-02 20:55:35,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 179. [2022-11-02 20:55:35,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 155 states have (on average 1.3225806451612903) internal successors, (205), 167 states have internal predecessors, (205), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-02 20:55:35,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 219 transitions. [2022-11-02 20:55:35,115 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 219 transitions. Word has length 35 [2022-11-02 20:55:35,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:35,115 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 219 transitions. [2022-11-02 20:55:35,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.206896551724138) internal successors, (64), 30 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:55:35,116 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 219 transitions. [2022-11-02 20:55:35,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 20:55:35,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:35,117 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:35,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:35,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:35,329 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:55:35,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:35,329 INFO L85 PathProgramCache]: Analyzing trace with hash 2145816479, now seen corresponding path program 1 times [2022-11-02 20:55:35,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:35,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537048207] [2022-11-02 20:55:35,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:35,329 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:35,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:35,330 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:35,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-02 20:55:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:35,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 20:55:35,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:55:35,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:35,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:55:35,933 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:35,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537048207] [2022-11-02 20:55:35,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537048207] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:35,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:55:35,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2022-11-02 20:55:35,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360755308] [2022-11-02 20:55:35,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:35,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:55:35,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:35,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:55:35,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:55:35,935 INFO L87 Difference]: Start difference. First operand 179 states and 219 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:55:36,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:36,568 INFO L93 Difference]: Finished difference Result 201 states and 240 transitions. [2022-11-02 20:55:36,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:55:36,570 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 37 [2022-11-02 20:55:36,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:36,570 INFO L225 Difference]: With dead ends: 201 [2022-11-02 20:55:36,571 INFO L226 Difference]: Without dead ends: 201 [2022-11-02 20:55:36,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:55:36,572 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 351 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:36,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 409 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:55:36,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-02 20:55:36,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 193. [2022-11-02 20:55:36,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 169 states have (on average 1.2958579881656804) internal successors, (219), 180 states have internal predecessors, (219), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-02 20:55:36,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 233 transitions. [2022-11-02 20:55:36,577 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 233 transitions. Word has length 37 [2022-11-02 20:55:36,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:36,578 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 233 transitions. [2022-11-02 20:55:36,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:55:36,578 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 233 transitions. [2022-11-02 20:55:36,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-02 20:55:36,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:36,579 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:36,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:36,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:36,791 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:55:36,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:36,791 INFO L85 PathProgramCache]: Analyzing trace with hash 731071653, now seen corresponding path program 2 times [2022-11-02 20:55:36,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:36,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844844914] [2022-11-02 20:55:36,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:55:36,792 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:36,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:36,793 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:36,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-02 20:55:36,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:55:36,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:55:36,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-02 20:55:36,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:36,984 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 [2022-11-02 20:55:36,993 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 [2022-11-02 20:55:39,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:55:39,858 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 21 treesize of output 21 [2022-11-02 20:55:39,871 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 20:55:39,871 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 [2022-11-02 20:55:40,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:55:40,298 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 21 treesize of output 21 [2022-11-02 20:55:40,314 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 20:55:40,315 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 [2022-11-02 20:55:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:55:40,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:45,189 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:45,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844844914] [2022-11-02 20:55:45,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844844914] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:45,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1577932329] [2022-11-02 20:55:45,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:55:45,189 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 20:55:45,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 20:55:45,190 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 20:55:45,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-02 20:55:45,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:55:45,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:55:45,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-02 20:55:45,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:45,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:55:45,442 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 [2022-11-02 20:55:45,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:55:45,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-11-02 20:55:45,949 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 20:55:45,949 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 [2022-11-02 20:55:46,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:55:46,219 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 21 treesize of output 21 [2022-11-02 20:55:46,232 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 20:55:46,232 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 [2022-11-02 20:55:46,302 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:55:46,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:46,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1577932329] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:46,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:55:46,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2022-11-02 20:55:46,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038991408] [2022-11-02 20:55:46,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:46,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:55:46,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:46,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:55:46,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=393, Unknown=2, NotChecked=0, Total=462 [2022-11-02 20:55:46,766 INFO L87 Difference]: Start difference. First operand 193 states and 233 transitions. Second operand has 20 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:55:47,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:47,618 INFO L93 Difference]: Finished difference Result 221 states and 265 transitions. [2022-11-02 20:55:47,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 20:55:47,619 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 39 [2022-11-02 20:55:47,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:47,621 INFO L225 Difference]: With dead ends: 221 [2022-11-02 20:55:47,621 INFO L226 Difference]: Without dead ends: 221 [2022-11-02 20:55:47,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=93, Invalid=607, Unknown=2, NotChecked=0, Total=702 [2022-11-02 20:55:47,621 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 69 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:47,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 616 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 300 Invalid, 0 Unknown, 201 Unchecked, 0.5s Time] [2022-11-02 20:55:47,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-11-02 20:55:47,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 205. [2022-11-02 20:55:47,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 179 states have (on average 1.2849162011173185) internal successors, (230), 190 states have internal predecessors, (230), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-02 20:55:47,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 250 transitions. [2022-11-02 20:55:47,628 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 250 transitions. Word has length 39 [2022-11-02 20:55:47,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:47,629 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 250 transitions. [2022-11-02 20:55:47,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:55:47,629 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 250 transitions. [2022-11-02 20:55:47,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-02 20:55:47,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:47,630 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:47,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:47,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:48,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt [2022-11-02 20:55:48,042 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:55:48,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:48,043 INFO L85 PathProgramCache]: Analyzing trace with hash -275846323, now seen corresponding path program 1 times [2022-11-02 20:55:48,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:48,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040976269] [2022-11-02 20:55:48,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:48,043 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:48,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:48,044 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:48,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-02 20:55:48,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:48,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 20:55:48,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:48,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 7 [2022-11-02 20:55:48,268 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 [2022-11-02 20:55:48,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-02 20:55:48,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:55:48,586 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 20 [2022-11-02 20:55:48,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:48,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:48,856 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:48,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040976269] [2022-11-02 20:55:48,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040976269] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:48,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1914445893] [2022-11-02 20:55:48,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:48,857 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 20:55:48,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 20:55:48,858 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 20:55:48,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-02 20:55:49,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:49,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-02 20:55:49,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:49,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 7 [2022-11-02 20:55:49,230 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 [2022-11-02 20:55:49,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-02 20:55:49,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:55:49,619 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 20 [2022-11-02 20:55:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:49,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:49,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1914445893] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:49,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:55:49,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2022-11-02 20:55:49,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163059219] [2022-11-02 20:55:49,741 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:49,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:55:49,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:49,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:55:49,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:55:49,742 INFO L87 Difference]: Start difference. First operand 205 states and 250 transitions. Second operand has 17 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:55:50,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:50,453 INFO L93 Difference]: Finished difference Result 234 states and 280 transitions. [2022-11-02 20:55:50,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:55:50,454 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 40 [2022-11-02 20:55:50,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:50,455 INFO L225 Difference]: With dead ends: 234 [2022-11-02 20:55:50,455 INFO L226 Difference]: Without dead ends: 234 [2022-11-02 20:55:50,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:55:50,457 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 77 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:50,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 540 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 356 Invalid, 0 Unknown, 91 Unchecked, 0.6s Time] [2022-11-02 20:55:50,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-02 20:55:50,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 225. [2022-11-02 20:55:50,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 199 states have (on average 1.2613065326633166) internal successors, (251), 210 states have internal predecessors, (251), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-02 20:55:50,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 271 transitions. [2022-11-02 20:55:50,463 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 271 transitions. Word has length 40 [2022-11-02 20:55:50,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:50,464 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 271 transitions. [2022-11-02 20:55:50,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:55:50,464 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 271 transitions. [2022-11-02 20:55:50,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 20:55:50,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:50,465 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:50,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2022-11-02 20:55:50,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:50,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:50,868 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:55:50,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:50,869 INFO L85 PathProgramCache]: Analyzing trace with hash -72017103, now seen corresponding path program 1 times [2022-11-02 20:55:50,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:50,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055103055] [2022-11-02 20:55:50,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:50,869 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:50,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:50,870 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:50,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-02 20:55:50,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:50,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:55:50,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:55:51,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:52,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-02 20:55:52,778 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:55:52,778 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:52,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055103055] [2022-11-02 20:55:52,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055103055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:52,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:55:52,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-02 20:55:52,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839457044] [2022-11-02 20:55:52,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:52,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:55:52,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:52,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:55:52,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:55:52,780 INFO L87 Difference]: Start difference. First operand 225 states and 271 transitions. Second operand has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 20:55:55,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:55,850 INFO L93 Difference]: Finished difference Result 294 states and 330 transitions. [2022-11-02 20:55:55,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:55:55,852 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 41 [2022-11-02 20:55:55,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:55,854 INFO L225 Difference]: With dead ends: 294 [2022-11-02 20:55:55,854 INFO L226 Difference]: Without dead ends: 294 [2022-11-02 20:55:55,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:55:55,855 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 418 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:55,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 955 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 407 Invalid, 0 Unknown, 45 Unchecked, 2.0s Time] [2022-11-02 20:55:55,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-11-02 20:55:55,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 222. [2022-11-02 20:55:55,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 197 states have (on average 1.2385786802030456) internal successors, (244), 207 states have internal predecessors, (244), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-02 20:55:55,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 264 transitions. [2022-11-02 20:55:55,862 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 264 transitions. Word has length 41 [2022-11-02 20:55:55,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:55,862 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 264 transitions. [2022-11-02 20:55:55,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 20:55:55,863 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 264 transitions. [2022-11-02 20:55:55,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-02 20:55:55,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:55,864 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:55,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-11-02 20:55:56,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:56,076 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:55:56,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:56,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1776836543, now seen corresponding path program 2 times [2022-11-02 20:55:56,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:56,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956737273] [2022-11-02 20:55:56,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:55:56,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:56,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:56,078 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:56,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-02 20:55:56,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:55:56,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:55:56,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 20:55:56,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:56,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-02 20:55:56,375 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 [2022-11-02 20:55:56,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:55:56,695 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 20 [2022-11-02 20:55:56,737 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:56,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:58,835 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 46 treesize of output 42 [2022-11-02 20:56:03,145 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 21 [2022-11-02 20:56:03,148 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 68 treesize of output 66 [2022-11-02 20:56:03,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:56:03,221 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:56:03,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956737273] [2022-11-02 20:56:03,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956737273] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:56:03,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:56:03,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2022-11-02 20:56:03,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88582972] [2022-11-02 20:56:03,222 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:03,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:56:03,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:56:03,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:56:03,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=312, Unknown=3, NotChecked=0, Total=380 [2022-11-02 20:56:03,223 INFO L87 Difference]: Start difference. First operand 222 states and 264 transitions. Second operand has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:56:03,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:03,746 INFO L93 Difference]: Finished difference Result 253 states and 295 transitions. [2022-11-02 20:56:03,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:56:03,746 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 40 [2022-11-02 20:56:03,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:03,748 INFO L225 Difference]: With dead ends: 253 [2022-11-02 20:56:03,748 INFO L226 Difference]: Without dead ends: 253 [2022-11-02 20:56:03,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=96, Invalid=453, Unknown=3, NotChecked=0, Total=552 [2022-11-02 20:56:03,749 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 78 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:03,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 608 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 174 Invalid, 0 Unknown, 106 Unchecked, 0.4s Time] [2022-11-02 20:56:03,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-02 20:56:03,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 241. [2022-11-02 20:56:03,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 214 states have (on average 1.2289719626168225) internal successors, (263), 224 states have internal predecessors, (263), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (13), 12 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-02 20:56:03,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 283 transitions. [2022-11-02 20:56:03,755 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 283 transitions. Word has length 40 [2022-11-02 20:56:03,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:03,756 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 283 transitions. [2022-11-02 20:56:03,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:56:03,756 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 283 transitions. [2022-11-02 20:56:03,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-02 20:56:03,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:03,757 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:03,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-02 20:56:03,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:56:03,969 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:56:03,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:03,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1776836544, now seen corresponding path program 1 times [2022-11-02 20:56:03,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:56:03,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273180846] [2022-11-02 20:56:03,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:03,970 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:56:03,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:56:03,971 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:56:03,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-02 20:56:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:04,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 20:56:04,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:04,122 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 [2022-11-02 20:56:05,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:05,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:07,391 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:07,391 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:56:07,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273180846] [2022-11-02 20:56:07,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273180846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:56:07,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:56:07,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 23 [2022-11-02 20:56:07,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138246382] [2022-11-02 20:56:07,392 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:07,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-02 20:56:07,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:56:07,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-02 20:56:07,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:56:07,393 INFO L87 Difference]: Start difference. First operand 241 states and 283 transitions. Second operand has 24 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:56:11,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:11,290 INFO L93 Difference]: Finished difference Result 326 states and 368 transitions. [2022-11-02 20:56:11,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 20:56:11,292 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 40 [2022-11-02 20:56:11,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:11,293 INFO L225 Difference]: With dead ends: 326 [2022-11-02 20:56:11,293 INFO L226 Difference]: Without dead ends: 326 [2022-11-02 20:56:11,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 20:56:11,293 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 230 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 510 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:11,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 1228 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 376 Invalid, 0 Unknown, 510 Unchecked, 2.1s Time] [2022-11-02 20:56:11,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-11-02 20:56:11,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 242. [2022-11-02 20:56:11,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 215 states have (on average 1.2325581395348837) internal successors, (265), 225 states have internal predecessors, (265), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (13), 12 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-02 20:56:11,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 285 transitions. [2022-11-02 20:56:11,300 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 285 transitions. Word has length 40 [2022-11-02 20:56:11,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:11,300 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 285 transitions. [2022-11-02 20:56:11,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:56:11,301 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 285 transitions. [2022-11-02 20:56:11,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 20:56:11,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:11,301 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:11,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-11-02 20:56:11,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:56:11,514 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:56:11,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:11,514 INFO L85 PathProgramCache]: Analyzing trace with hash 392679819, now seen corresponding path program 1 times [2022-11-02 20:56:11,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:56:11,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [226082027] [2022-11-02 20:56:11,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:11,514 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:56:11,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:56:11,515 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:56:11,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-02 20:56:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:11,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-02 20:56:11,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:11,658 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 [2022-11-02 20:56:11,844 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-02 20:56:11,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-02 20:56:11,972 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 [2022-11-02 20:56:12,101 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 [2022-11-02 20:56:12,154 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 20 [2022-11-02 20:56:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:56:12,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:12,347 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 38 treesize of output 34 [2022-11-02 20:56:18,323 WARN L234 SmtUtils]: Spent 5.41s on a formula simplification. DAG size of input: 38 DAG size of output: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:56:18,324 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:56:18,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [226082027] [2022-11-02 20:56:18,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [226082027] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:56:18,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1348471125] [2022-11-02 20:56:18,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:18,325 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 20:56:18,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 20:56:18,325 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 20:56:18,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-02 20:56:18,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:18,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-02 20:56:18,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:18,564 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 [2022-11-02 20:56:18,868 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 20:56:18,868 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 [2022-11-02 20:56:19,030 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 [2022-11-02 20:56:19,234 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 [2022-11-02 20:56:19,253 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 20 [2022-11-02 20:56:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:56:19,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:19,401 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 45 treesize of output 41 [2022-11-02 20:56:19,416 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:56:19,416 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 50 treesize of output 56 [2022-11-02 20:56:21,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1348471125] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:56:21,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:56:21,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2022-11-02 20:56:21,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591777415] [2022-11-02 20:56:21,837 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:21,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-02 20:56:21,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:56:21,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-02 20:56:21,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=712, Unknown=1, NotChecked=0, Total=812 [2022-11-02 20:56:21,839 INFO L87 Difference]: Start difference. First operand 242 states and 285 transitions. Second operand has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 18 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:56:23,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:23,004 INFO L93 Difference]: Finished difference Result 263 states and 307 transitions. [2022-11-02 20:56:23,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:56:23,005 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 18 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2022-11-02 20:56:23,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:23,006 INFO L225 Difference]: With dead ends: 263 [2022-11-02 20:56:23,006 INFO L226 Difference]: Without dead ends: 263 [2022-11-02 20:56:23,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=172, Invalid=1087, Unknown=1, NotChecked=0, Total=1260 [2022-11-02 20:56:23,007 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 138 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:23,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 617 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 538 Invalid, 0 Unknown, 20 Unchecked, 0.8s Time] [2022-11-02 20:56:23,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-02 20:56:23,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 236. [2022-11-02 20:56:23,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 209 states have (on average 1.244019138755981) internal successors, (260), 219 states have internal predecessors, (260), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (13), 12 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-02 20:56:23,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 280 transitions. [2022-11-02 20:56:23,013 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 280 transitions. Word has length 41 [2022-11-02 20:56:23,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:23,014 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 280 transitions. [2022-11-02 20:56:23,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 18 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:56:23,014 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 280 transitions. [2022-11-02 20:56:23,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 20:56:23,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:23,015 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:23,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2022-11-02 20:56:23,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-02 20:56:23,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:56:23,421 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:56:23,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:23,422 INFO L85 PathProgramCache]: Analyzing trace with hash -503073279, now seen corresponding path program 1 times [2022-11-02 20:56:23,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:56:23,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [795719800] [2022-11-02 20:56:23,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:23,422 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:56:23,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:56:23,423 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:56:23,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-02 20:56:23,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:23,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-02 20:56:23,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:23,621 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 [2022-11-02 20:56:23,917 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 17 treesize of output 13 [2022-11-02 20:56:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:56:24,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:56:25,484 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:56:25,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [795719800] [2022-11-02 20:56:25,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [795719800] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:56:25,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:56:25,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2022-11-02 20:56:25,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565023928] [2022-11-02 20:56:25,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:25,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-02 20:56:25,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:56:25,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-02 20:56:25,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:56:25,486 INFO L87 Difference]: Start difference. First operand 236 states and 280 transitions. Second operand has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:56:28,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:28,531 INFO L93 Difference]: Finished difference Result 434 states and 483 transitions. [2022-11-02 20:56:28,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 20:56:28,532 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2022-11-02 20:56:28,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:28,534 INFO L225 Difference]: With dead ends: 434 [2022-11-02 20:56:28,534 INFO L226 Difference]: Without dead ends: 434 [2022-11-02 20:56:28,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=521, Invalid=2029, Unknown=0, NotChecked=0, Total=2550 [2022-11-02 20:56:28,535 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 614 mSDsluCounter, 1439 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 1570 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:28,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [614 Valid, 1570 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 668 Invalid, 0 Unknown, 96 Unchecked, 1.5s Time] [2022-11-02 20:56:28,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-11-02 20:56:28,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 227. [2022-11-02 20:56:28,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 200 states have (on average 1.24) internal successors, (248), 210 states have internal predecessors, (248), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (13), 12 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-02 20:56:28,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 268 transitions. [2022-11-02 20:56:28,542 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 268 transitions. Word has length 41 [2022-11-02 20:56:28,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:28,543 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 268 transitions. [2022-11-02 20:56:28,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:56:28,543 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 268 transitions. [2022-11-02 20:56:28,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-02 20:56:28,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:28,544 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:28,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-02 20:56:28,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:56:28,756 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:56:28,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:28,756 INFO L85 PathProgramCache]: Analyzing trace with hash 2062437122, now seen corresponding path program 1 times [2022-11-02 20:56:28,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:56:28,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85845403] [2022-11-02 20:56:28,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:28,757 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:56:28,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:56:28,758 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:56:28,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-02 20:56:28,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:28,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 20:56:28,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:29,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-02 20:56:29,232 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 [2022-11-02 20:56:29,258 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:56:29,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:29,505 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-02 20:56:29,505 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:56:29,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85845403] [2022-11-02 20:56:29,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85845403] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:56:29,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:56:29,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2022-11-02 20:56:29,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619399530] [2022-11-02 20:56:29,506 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:29,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:56:29,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:56:29,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:56:29,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:56:29,508 INFO L87 Difference]: Start difference. First operand 227 states and 268 transitions. Second operand has 18 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-02 20:56:31,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:31,053 INFO L93 Difference]: Finished difference Result 323 states and 357 transitions. [2022-11-02 20:56:31,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-02 20:56:31,054 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2022-11-02 20:56:31,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:31,055 INFO L225 Difference]: With dead ends: 323 [2022-11-02 20:56:31,055 INFO L226 Difference]: Without dead ends: 323 [2022-11-02 20:56:31,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2022-11-02 20:56:31,057 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 446 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:31,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 957 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 397 Invalid, 0 Unknown, 42 Unchecked, 0.7s Time] [2022-11-02 20:56:31,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-11-02 20:56:31,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 235. [2022-11-02 20:56:31,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 206 states have (on average 1.2378640776699028) internal successors, (255), 217 states have internal predecessors, (255), 7 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (13), 12 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-02 20:56:31,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 275 transitions. [2022-11-02 20:56:31,063 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 275 transitions. Word has length 42 [2022-11-02 20:56:31,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:31,063 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 275 transitions. [2022-11-02 20:56:31,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-02 20:56:31,064 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 275 transitions. [2022-11-02 20:56:31,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 20:56:31,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:31,065 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:31,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-02 20:56:31,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:56:31,277 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:56:31,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:31,277 INFO L85 PathProgramCache]: Analyzing trace with hash -752641937, now seen corresponding path program 1 times [2022-11-02 20:56:31,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:56:31,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819979428] [2022-11-02 20:56:31,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:31,277 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:56:31,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:56:31,278 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:56:31,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-02 20:56:31,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:31,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 20:56:31,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:31,412 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 [2022-11-02 20:56:31,614 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 [2022-11-02 20:56:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:31,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:35,793 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 14 [2022-11-02 20:56:35,795 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 20 treesize of output 16 [2022-11-02 20:56:35,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:56:35,860 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:56:35,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819979428] [2022-11-02 20:56:35,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819979428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:56:35,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:56:35,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2022-11-02 20:56:35,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919558640] [2022-11-02 20:56:35,861 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:35,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:56:35,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:56:35,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:56:35,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=124, Unknown=2, NotChecked=0, Total=156 [2022-11-02 20:56:35,863 INFO L87 Difference]: Start difference. First operand 235 states and 275 transitions. Second operand has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:56:36,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:36,511 INFO L93 Difference]: Finished difference Result 262 states and 299 transitions. [2022-11-02 20:56:36,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:56:36,512 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-11-02 20:56:36,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:36,513 INFO L225 Difference]: With dead ends: 262 [2022-11-02 20:56:36,513 INFO L226 Difference]: Without dead ends: 262 [2022-11-02 20:56:36,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=61, Invalid=243, Unknown=2, NotChecked=0, Total=306 [2022-11-02 20:56:36,514 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 74 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:36,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 726 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 215 Invalid, 0 Unknown, 18 Unchecked, 0.5s Time] [2022-11-02 20:56:36,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-11-02 20:56:36,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 241. [2022-11-02 20:56:36,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 210 states have (on average 1.2380952380952381) internal successors, (260), 222 states have internal predecessors, (260), 7 states have call successors, (7), 6 states have call predecessors, (7), 10 states have return successors, (13), 12 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-02 20:56:36,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 280 transitions. [2022-11-02 20:56:36,519 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 280 transitions. Word has length 41 [2022-11-02 20:56:36,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:36,520 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 280 transitions. [2022-11-02 20:56:36,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:56:36,520 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 280 transitions. [2022-11-02 20:56:36,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-02 20:56:36,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:36,521 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:36,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-02 20:56:36,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:56:36,733 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:56:36,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:36,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1671328571, now seen corresponding path program 3 times [2022-11-02 20:56:36,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:56:36,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943715769] [2022-11-02 20:56:36,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:56:36,734 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:56:36,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:56:36,735 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:56:36,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-02 20:56:36,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:56:36,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:56:36,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-02 20:56:36,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:36,945 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 [2022-11-02 20:56:36,952 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 [2022-11-02 20:56:37,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:56:37,528 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 [2022-11-02 20:56:37,541 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 20:56:37,541 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 [2022-11-02 20:56:37,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:56:37,908 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 [2022-11-02 20:56:37,929 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 20:56:37,929 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 [2022-11-02 20:56:38,024 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 20:56:38,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:40,649 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:56:40,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943715769] [2022-11-02 20:56:40,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943715769] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:56:40,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1350005925] [2022-11-02 20:56:40,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:56:40,650 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 20:56:40,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 20:56:40,650 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 20:56:40,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-02 20:56:40,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:56:40,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:56:40,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-02 20:56:40,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:40,896 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 [2022-11-02 20:56:40,901 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 [2022-11-02 20:56:41,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:56:41,275 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 [2022-11-02 20:56:41,288 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 20:56:41,289 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 [2022-11-02 20:56:41,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:56:41,494 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 [2022-11-02 20:56:41,504 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 20:56:41,505 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 [2022-11-02 20:56:41,549 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 20:56:41,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:41,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1350005925] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:56:41,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:56:41,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2022-11-02 20:56:41,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243411690] [2022-11-02 20:56:41,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:41,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:56:41,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:56:41,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:56:41,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=259, Unknown=1, NotChecked=0, Total=306 [2022-11-02 20:56:41,996 INFO L87 Difference]: Start difference. First operand 241 states and 280 transitions. Second operand has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 15 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:56:42,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:42,907 INFO L93 Difference]: Finished difference Result 274 states and 312 transitions. [2022-11-02 20:56:42,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:56:42,908 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 15 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2022-11-02 20:56:42,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:42,909 INFO L225 Difference]: With dead ends: 274 [2022-11-02 20:56:42,909 INFO L226 Difference]: Without dead ends: 274 [2022-11-02 20:56:42,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=88, Invalid=511, Unknown=1, NotChecked=0, Total=600 [2022-11-02 20:56:42,910 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 121 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:42,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 527 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 294 Invalid, 0 Unknown, 119 Unchecked, 0.6s Time] [2022-11-02 20:56:42,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-11-02 20:56:42,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 232. [2022-11-02 20:56:42,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 202 states have (on average 1.2425742574257426) internal successors, (251), 215 states have internal predecessors, (251), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (11), 10 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-02 20:56:42,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 268 transitions. [2022-11-02 20:56:42,916 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 268 transitions. Word has length 42 [2022-11-02 20:56:42,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:42,916 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 268 transitions. [2022-11-02 20:56:42,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 15 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:56:42,917 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 268 transitions. [2022-11-02 20:56:42,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-02 20:56:42,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:42,918 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:42,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2022-11-02 20:56:43,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-02 20:56:43,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:56:43,325 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:56:43,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:43,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1199661072, now seen corresponding path program 1 times [2022-11-02 20:56:43,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:56:43,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [791409131] [2022-11-02 20:56:43,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:43,326 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:56:43,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:56:43,327 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:56:43,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-02 20:56:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:43,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 20:56:43,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:43,659 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 11 treesize of output 7 [2022-11-02 20:56:43,760 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-02 20:56:43,760 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 11 treesize of output 7 [2022-11-02 20:56:44,015 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 [2022-11-02 20:56:44,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:44,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:44,556 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 26 treesize of output 24 [2022-11-02 20:56:44,559 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 46 treesize of output 44 [2022-11-02 20:56:51,239 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:56:51,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [791409131] [2022-11-02 20:56:51,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [791409131] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:56:51,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1286545179] [2022-11-02 20:56:51,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:51,240 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 20:56:51,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 20:56:51,241 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 20:56:51,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-02 20:56:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:51,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-02 20:56:51,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:51,824 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 11 treesize of output 7 [2022-11-02 20:56:51,982 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-02 20:56:51,982 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 11 treesize of output 7 [2022-11-02 20:56:54,374 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 [2022-11-02 20:56:54,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:54,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:54,659 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 26 treesize of output 24 [2022-11-02 20:56:54,663 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 46 treesize of output 44 [2022-11-02 20:57:03,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1286545179] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:57:03,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:57:03,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-11-02 20:57:03,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967175820] [2022-11-02 20:57:03,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:57:03,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 20:57:03,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:57:03,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 20:57:03,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=812, Unknown=3, NotChecked=0, Total=930 [2022-11-02 20:57:03,053 INFO L87 Difference]: Start difference. First operand 232 states and 268 transitions. Second operand has 21 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:57:03,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:03,205 INFO L93 Difference]: Finished difference Result 248 states and 282 transitions. [2022-11-02 20:57:03,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:57:03,206 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 42 [2022-11-02 20:57:03,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:03,207 INFO L225 Difference]: With dead ends: 248 [2022-11-02 20:57:03,207 INFO L226 Difference]: Without dead ends: 227 [2022-11-02 20:57:03,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=125, Invalid=928, Unknown=3, NotChecked=0, Total=1056 [2022-11-02 20:57:03,208 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 30 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:03,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 503 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 164 Unchecked, 0.1s Time] [2022-11-02 20:57:03,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-02 20:57:03,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-11-02 20:57:03,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 197 states have (on average 1.2436548223350254) internal successors, (245), 211 states have internal predecessors, (245), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-02 20:57:03,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 261 transitions. [2022-11-02 20:57:03,218 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 261 transitions. Word has length 42 [2022-11-02 20:57:03,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:03,219 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 261 transitions. [2022-11-02 20:57:03,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:57:03,219 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 261 transitions. [2022-11-02 20:57:03,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-02 20:57:03,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:03,220 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:57:03,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2022-11-02 20:57:03,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-02 20:57:03,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:57:03,624 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:57:03,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:03,624 INFO L85 PathProgramCache]: Analyzing trace with hash -488958544, now seen corresponding path program 1 times [2022-11-02 20:57:03,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:57:03,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1601222157] [2022-11-02 20:57:03,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:03,625 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:57:03,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:57:03,626 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:57:03,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-02 20:57:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:03,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 20:57:03,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:57:04,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-02 20:57:04,845 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 [2022-11-02 20:57:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:57:04,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:57:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-02 20:57:05,430 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:57:05,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1601222157] [2022-11-02 20:57:05,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1601222157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:57:05,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:57:05,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 22 [2022-11-02 20:57:05,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128188614] [2022-11-02 20:57:05,430 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:57:05,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:57:05,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:57:05,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:57:05,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:57:05,431 INFO L87 Difference]: Start difference. First operand 227 states and 261 transitions. Second operand has 23 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 20 states have internal predecessors, (65), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 20:57:06,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:06,225 INFO L93 Difference]: Finished difference Result 254 states and 289 transitions. [2022-11-02 20:57:06,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 20:57:06,226 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 20 states have internal predecessors, (65), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2022-11-02 20:57:06,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:06,227 INFO L225 Difference]: With dead ends: 254 [2022-11-02 20:57:06,227 INFO L226 Difference]: Without dead ends: 254 [2022-11-02 20:57:06,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:57:06,227 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 67 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:06,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 952 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 298 Unchecked, 0.4s Time] [2022-11-02 20:57:06,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-11-02 20:57:06,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 229. [2022-11-02 20:57:06,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 199 states have (on average 1.2412060301507537) internal successors, (247), 213 states have internal predecessors, (247), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-02 20:57:06,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 263 transitions. [2022-11-02 20:57:06,233 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 263 transitions. Word has length 43 [2022-11-02 20:57:06,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:06,234 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 263 transitions. [2022-11-02 20:57:06,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 20 states have internal predecessors, (65), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 20:57:06,234 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 263 transitions. [2022-11-02 20:57:06,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-02 20:57:06,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:06,235 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:57:06,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (53)] Ended with exit code 0 [2022-11-02 20:57:06,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:57:06,448 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:57:06,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:06,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1857063425, now seen corresponding path program 1 times [2022-11-02 20:57:06,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:57:06,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1848514677] [2022-11-02 20:57:06,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:06,449 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:57:06,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:57:06,450 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:57:06,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-02 20:57:06,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:06,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:57:06,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:57:06,644 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 [2022-11-02 20:57:06,987 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 [2022-11-02 20:57:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:07,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:57:09,293 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 14 [2022-11-02 20:57:09,296 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 24 treesize of output 20 [2022-11-02 20:57:09,414 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:57:09,414 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:57:09,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1848514677] [2022-11-02 20:57:09,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1848514677] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:57:09,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:57:09,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-02 20:57:09,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864922894] [2022-11-02 20:57:09,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:57:09,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:57:09,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:57:09,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:57:09,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=188, Unknown=1, NotChecked=0, Total=240 [2022-11-02 20:57:09,416 INFO L87 Difference]: Start difference. First operand 229 states and 263 transitions. Second operand has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:57:10,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:10,767 INFO L93 Difference]: Finished difference Result 266 states and 297 transitions. [2022-11-02 20:57:10,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:57:10,768 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 42 [2022-11-02 20:57:10,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:10,769 INFO L225 Difference]: With dead ends: 266 [2022-11-02 20:57:10,769 INFO L226 Difference]: Without dead ends: 266 [2022-11-02 20:57:10,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=111, Invalid=394, Unknown=1, NotChecked=0, Total=506 [2022-11-02 20:57:10,770 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 171 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:10,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 532 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 438 Invalid, 0 Unknown, 33 Unchecked, 1.0s Time] [2022-11-02 20:57:10,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-02 20:57:10,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 234. [2022-11-02 20:57:10,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 204 states have (on average 1.2401960784313726) internal successors, (253), 218 states have internal predecessors, (253), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-02 20:57:10,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 269 transitions. [2022-11-02 20:57:10,775 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 269 transitions. Word has length 42 [2022-11-02 20:57:10,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:10,775 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 269 transitions. [2022-11-02 20:57:10,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:57:10,776 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 269 transitions. [2022-11-02 20:57:10,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-02 20:57:10,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:10,777 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:57:10,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-02 20:57:10,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:57:10,993 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-02 20:57:10,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:10,993 INFO L85 PathProgramCache]: Analyzing trace with hash -591810866, now seen corresponding path program 1 times [2022-11-02 20:57:10,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:57:10,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802781989] [2022-11-02 20:57:10,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:10,994 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:57:10,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:57:10,995 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:57:10,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-02 20:57:11,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:11,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-02 20:57:11,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:57:11,554 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 11 treesize of output 7 [2022-11-02 20:57:11,753 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 33 treesize of output 21 [2022-11-02 20:57:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:57:16,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:57:18,417 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 60 treesize of output 56 [2022-11-02 20:57:36,360 WARN L234 SmtUtils]: Spent 8.15s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:57:36,361 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:57:36,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802781989] [2022-11-02 20:57:36,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802781989] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:57:36,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1103188982] [2022-11-02 20:57:36,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:36,362 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 20:57:36,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 20:57:36,363 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 20:57:36,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216ce3e7-798b-435d-8d18-fe2804b85bd7/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-02 20:57:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:36,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-02 20:57:36,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:57:39,777 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 [2022-11-02 20:57:40,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-11-02 20:57:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:57:42,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:57:47,660 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 116 treesize of output 108 [2022-11-02 20:58:00,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1103188982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:00,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:58:00,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2022-11-02 20:58:00,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757429130] [2022-11-02 20:58:00,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:58:01,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-02 20:58:01,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:58:01,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-02 20:58:01,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1700, Unknown=14, NotChecked=0, Total=1892 [2022-11-02 20:58:01,006 INFO L87 Difference]: Start difference. First operand 234 states and 269 transitions. Second operand has 29 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 25 states have internal predecessors, (71), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)