./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/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_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/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_89010900-7f27-40e4-ac88-904b468a2292/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 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 --- 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 21:01:45,269 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:01:45,275 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:01:45,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:01:45,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:01:45,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:01:45,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:01:45,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:01:45,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:01:45,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:01:45,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:01:45,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:01:45,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:01:45,360 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:01:45,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:01:45,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:01:45,364 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:01:45,365 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:01:45,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:01:45,368 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:01:45,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:01:45,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:01:45,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:01:45,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:01:45,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:01:45,394 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:01:45,395 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:01:45,397 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:01:45,397 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:01:45,398 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:01:45,399 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:01:45,400 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:01:45,402 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:01:45,403 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:01:45,404 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:01:45,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:01:45,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:01:45,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:01:45,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:01:45,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:01:45,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:01:45,409 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-02 21:01:45,447 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:01:45,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:01:45,448 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:01:45,448 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:01:45,449 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:01:45,449 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:01:45,450 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:01:45,450 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:01:45,451 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:01:45,451 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:01:45,452 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 21:01:45,452 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-02 21:01:45,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:01:45,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 21:01:45,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:01:45,453 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-02 21:01:45,453 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-02 21:01:45,453 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-02 21:01:45,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:01:45,454 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 21:01:45,454 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 21:01:45,454 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:01:45,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:01:45,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:01:45,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:01:45,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:01:45,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:01:45,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:01:45,457 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:01:45,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:01:45,458 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_89010900-7f27-40e4-ac88-904b468a2292/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 [2022-11-02 21:01:45,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:01:45,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:01:45,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:01:45,815 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:01:45,816 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:01:45,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2022-11-02 21:01:45,899 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/data/a5122a2ed/e99565578e124a42a007fc052ab8dd99/FLAG1e9823f60 [2022-11-02 21:01:46,614 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:01:46,614 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2022-11-02 21:01:46,631 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/data/a5122a2ed/e99565578e124a42a007fc052ab8dd99/FLAG1e9823f60 [2022-11-02 21:01:46,821 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/data/a5122a2ed/e99565578e124a42a007fc052ab8dd99 [2022-11-02 21:01:46,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:01:46,826 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:01:46,829 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:01:46,829 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:01:46,833 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:01:46,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:01:46" (1/1) ... [2022-11-02 21:01:46,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d71e02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:46, skipping insertion in model container [2022-11-02 21:01:46,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:01:46" (1/1) ... [2022-11-02 21:01:46,848 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:01:46,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:01:47,605 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:01:47,627 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 21:01:47,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6f9f4292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:47, skipping insertion in model container [2022-11-02 21:01:47,628 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:01:47,629 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-02 21:01:47,632 INFO L158 Benchmark]: Toolchain (without parser) took 804.23ms. Allocated memory is still 81.8MB. Free memory was 40.8MB in the beginning and 51.8MB in the end (delta: -11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-02 21:01:47,633 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 81.8MB. Free memory is still 59.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 21:01:47,634 INFO L158 Benchmark]: CACSL2BoogieTranslator took 800.35ms. Allocated memory is still 81.8MB. Free memory was 40.5MB in the beginning and 51.8MB in the end (delta: -11.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-02 21:01:47,637 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 81.8MB. Free memory is still 59.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 800.35ms. Allocated memory is still 81.8MB. Free memory was 40.5MB in the beginning and 51.8MB in the end (delta: -11.3MB). Peak memory consumption was 8.4MB. 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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/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_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/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_89010900-7f27-40e4-ac88-904b468a2292/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 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 --- 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 21:01:49,999 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:01:50,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:01:50,030 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:01:50,031 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:01:50,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:01:50,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:01:50,035 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:01:50,037 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:01:50,038 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:01:50,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:01:50,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:01:50,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:01:50,043 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:01:50,044 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:01:50,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:01:50,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:01:50,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:01:50,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:01:50,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:01:50,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:01:50,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:01:50,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:01:50,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:01:50,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:01:50,062 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:01:50,063 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:01:50,064 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:01:50,064 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:01:50,066 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:01:50,066 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:01:50,067 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:01:50,068 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:01:50,070 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:01:50,074 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:01:50,075 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:01:50,077 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:01:50,077 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:01:50,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:01:50,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:01:50,081 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:01:50,082 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-02 21:01:50,123 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:01:50,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:01:50,125 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:01:50,125 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:01:50,126 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:01:50,127 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:01:50,128 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:01:50,129 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:01:50,129 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:01:50,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:01:50,131 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 21:01:50,131 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-02 21:01:50,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:01:50,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 21:01:50,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:01:50,132 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-02 21:01:50,132 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-02 21:01:50,133 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-02 21:01:50,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:01:50,133 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 21:01:50,134 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-02 21:01:50,134 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-02 21:01:50,134 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 21:01:50,134 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:01:50,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:01:50,135 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:01:50,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:01:50,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:01:50,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:01:50,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:01:50,136 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-02 21:01:50,137 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-02 21:01:50,137 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-02 21:01:50,137 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_89010900-7f27-40e4-ac88-904b468a2292/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 [2022-11-02 21:01:50,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:01:50,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:01:50,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:01:50,618 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:01:50,621 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:01:50,622 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2022-11-02 21:01:50,702 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/data/5bc0f5a7d/147067ed401645619780274440538bee/FLAGe7d172323 [2022-11-02 21:01:51,335 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:01:51,335 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2022-11-02 21:01:51,355 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/data/5bc0f5a7d/147067ed401645619780274440538bee/FLAGe7d172323 [2022-11-02 21:01:51,616 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/data/5bc0f5a7d/147067ed401645619780274440538bee [2022-11-02 21:01:51,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:01:51,625 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:01:51,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:01:51,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:01:51,632 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:01:51,633 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:01:51" (1/1) ... [2022-11-02 21:01:51,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ffe1bb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:51, skipping insertion in model container [2022-11-02 21:01:51,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:01:51" (1/1) ... [2022-11-02 21:01:51,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:01:51,695 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:01:52,277 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:01:52,299 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-02 21:01:52,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:01:52,408 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:01:52,428 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:01:52,521 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:01:52,578 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:01:52,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:52 WrapperNode [2022-11-02 21:01:52,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:01:52,581 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:01:52,581 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:01:52,581 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:01:52,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:52" (1/1) ... [2022-11-02 21:01:52,646 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:52" (1/1) ... [2022-11-02 21:01:52,694 INFO L138 Inliner]: procedures = 179, calls = 145, calls flagged for inlining = 33, calls inlined = 20, statements flattened = 332 [2022-11-02 21:01:52,695 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:01:52,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:01:52,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:01:52,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:01:52,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:52" (1/1) ... [2022-11-02 21:01:52,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:52" (1/1) ... [2022-11-02 21:01:52,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:52" (1/1) ... [2022-11-02 21:01:52,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:52" (1/1) ... [2022-11-02 21:01:52,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:52" (1/1) ... [2022-11-02 21:01:52,748 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:52" (1/1) ... [2022-11-02 21:01:52,763 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:52" (1/1) ... [2022-11-02 21:01:52,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:52" (1/1) ... [2022-11-02 21:01:52,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:01:52,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:01:52,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:01:52,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:01:52,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:52" (1/1) ... [2022-11-02 21:01:52,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:01:52,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:01:52,814 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:01:52,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:01:52,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-02 21:01:52,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-02 21:01:52,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-02 21:01:52,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-02 21:01:52,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-02 21:01:52,858 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-02 21:01:52,858 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2022-11-02 21:01:52,860 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2022-11-02 21:01:52,860 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2022-11-02 21:01:52,860 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2022-11-02 21:01:52,861 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-02 21:01:52,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-02 21:01:52,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2022-11-02 21:01:52,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2022-11-02 21:01:52,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 21:01:52,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:01:52,861 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_msg_free [2022-11-02 21:01:52,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_msg_free [2022-11-02 21:01:52,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 21:01:52,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 21:01:52,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2022-11-02 21:01:52,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 21:01:52,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-11-02 21:01:52,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 21:01:52,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-02 21:01:52,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-11-02 21:01:52,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2022-11-02 21:01:52,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:01:52,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:01:53,140 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:01:53,143 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:01:53,147 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-02 21:01:54,687 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:01:54,698 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:01:54,698 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 21:01:54,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:01:54 BoogieIcfgContainer [2022-11-02 21:01:54,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:01:54,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:01:54,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:01:54,708 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:01:54,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:01:51" (1/3) ... [2022-11-02 21:01:54,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ccf7ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:01:54, skipping insertion in model container [2022-11-02 21:01:54,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:01:52" (2/3) ... [2022-11-02 21:01:54,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ccf7ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:01:54, skipping insertion in model container [2022-11-02 21:01:54,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:01:54" (3/3) ... [2022-11-02 21:01:54,711 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test12-2.i [2022-11-02 21:01:54,732 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:01:54,732 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 124 error locations. [2022-11-02 21:01:54,818 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:01:54,826 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;@6a4344e9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:01:54,827 INFO L358 AbstractCegarLoop]: Starting to check reachability of 124 error locations. [2022-11-02 21:01:54,834 INFO L276 IsEmpty]: Start isEmpty. Operand has 313 states, 171 states have (on average 1.8654970760233918) internal successors, (319), 294 states have internal predecessors, (319), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-02 21:01:54,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-02 21:01:54,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:54,844 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:01:54,845 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:01:54,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:54,852 INFO L85 PathProgramCache]: Analyzing trace with hash -297378988, now seen corresponding path program 1 times [2022-11-02 21:01:54,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:54,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146947652] [2022-11-02 21:01:54,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:54,867 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:54,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:54,873 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:54,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-02 21:01:55,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:55,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 21:01:55,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:55,253 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 21:01:55,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:55,254 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:55,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146947652] [2022-11-02 21:01:55,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146947652] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:55,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:55,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 21:01:55,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999341715] [2022-11-02 21:01:55,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:55,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:01:55,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:55,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:01:55,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:01:55,310 INFO L87 Difference]: Start difference. First operand has 313 states, 171 states have (on average 1.8654970760233918) internal successors, (319), 294 states have internal predecessors, (319), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 21:01:56,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:56,482 INFO L93 Difference]: Finished difference Result 412 states and 459 transitions. [2022-11-02 21:01:56,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 21:01:56,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-02 21:01:56,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:56,504 INFO L225 Difference]: With dead ends: 412 [2022-11-02 21:01:56,504 INFO L226 Difference]: Without dead ends: 408 [2022-11-02 21:01:56,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:01:56,509 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 299 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:56,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 522 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 21:01:56,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-11-02 21:01:56,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 344. [2022-11-02 21:01:56,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 200 states have (on average 1.83) internal successors, (366), 321 states have internal predecessors, (366), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-11-02 21:01:56,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 402 transitions. [2022-11-02 21:01:56,590 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 402 transitions. Word has length 11 [2022-11-02 21:01:56,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:56,591 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 402 transitions. [2022-11-02 21:01:56,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 21:01:56,592 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 402 transitions. [2022-11-02 21:01:56,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-02 21:01:56,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:56,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:01:56,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:56,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:01:56,805 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:01:56,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:56,806 INFO L85 PathProgramCache]: Analyzing trace with hash -297378987, now seen corresponding path program 1 times [2022-11-02 21:01:56,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:56,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2020694266] [2022-11-02 21:01:56,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:56,807 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:56,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:56,809 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:56,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-02 21:01:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:56,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 21:01:56,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:57,094 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 21:01:57,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:57,095 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:57,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2020694266] [2022-11-02 21:01:57,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2020694266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:57,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:57,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 21:01:57,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268171535] [2022-11-02 21:01:57,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:57,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:01:57,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:57,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:01:57,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:01:57,105 INFO L87 Difference]: Start difference. First operand 344 states and 402 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 21:01:58,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:58,484 INFO L93 Difference]: Finished difference Result 476 states and 564 transitions. [2022-11-02 21:01:58,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 21:01:58,486 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-02 21:01:58,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:58,488 INFO L225 Difference]: With dead ends: 476 [2022-11-02 21:01:58,488 INFO L226 Difference]: Without dead ends: 476 [2022-11-02 21:01:58,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:01:58,490 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 131 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:58,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 849 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-02 21:01:58,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-11-02 21:01:58,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 407. [2022-11-02 21:01:58,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 256 states have (on average 1.83203125) internal successors, (469), 376 states have internal predecessors, (469), 22 states have call successors, (22), 9 states have call predecessors, (22), 9 states have return successors, (29), 23 states have call predecessors, (29), 22 states have call successors, (29) [2022-11-02 21:01:58,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 520 transitions. [2022-11-02 21:01:58,514 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 520 transitions. Word has length 11 [2022-11-02 21:01:58,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:58,514 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 520 transitions. [2022-11-02 21:01:58,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 21:01:58,515 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 520 transitions. [2022-11-02 21:01:58,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-02 21:01:58,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:58,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:01:58,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:58,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:01:58,728 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:01:58,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:58,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1184882668, now seen corresponding path program 1 times [2022-11-02 21:01:58,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:58,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2039712576] [2022-11-02 21:01:58,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:58,729 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:58,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:58,731 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:58,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-02 21:01:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:58,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:01:58,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:58,860 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 21:01:58,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:58,860 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:58,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2039712576] [2022-11-02 21:01:58,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2039712576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:58,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:58,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:01:58,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274859608] [2022-11-02 21:01:58,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:58,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:01:58,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:58,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:01:58,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:01:58,863 INFO L87 Difference]: Start difference. First operand 407 states and 520 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 21:01:59,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:59,090 INFO L93 Difference]: Finished difference Result 649 states and 797 transitions. [2022-11-02 21:01:59,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:01:59,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-02 21:01:59,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:59,099 INFO L225 Difference]: With dead ends: 649 [2022-11-02 21:01:59,099 INFO L226 Difference]: Without dead ends: 649 [2022-11-02 21:01:59,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:01:59,111 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 259 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 1486 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:59,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 1486 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:01:59,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-11-02 21:01:59,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 392. [2022-11-02 21:01:59,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 241 states have (on average 1.8215767634854771) internal successors, (439), 362 states have internal predecessors, (439), 21 states have call successors, (21), 9 states have call predecessors, (21), 10 states have return successors, (34), 22 states have call predecessors, (34), 21 states have call successors, (34) [2022-11-02 21:01:59,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 494 transitions. [2022-11-02 21:01:59,157 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 494 transitions. Word has length 11 [2022-11-02 21:01:59,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:59,157 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 494 transitions. [2022-11-02 21:01:59,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 21:01:59,158 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 494 transitions. [2022-11-02 21:01:59,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 21:01:59,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:59,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:01:59,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:59,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:01:59,369 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:01:59,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:59,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1981613461, now seen corresponding path program 1 times [2022-11-02 21:01:59,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:01:59,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395497648] [2022-11-02 21:01:59,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:59,370 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:01:59,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:01:59,371 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:01:59,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-02 21:01:59,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:59,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 21:01:59,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:59,642 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 21:01:59,684 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 21:01:59,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:01:59,685 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:01:59,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [395497648] [2022-11-02 21:01:59,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [395497648] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:01:59,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:01:59,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:01:59,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021680407] [2022-11-02 21:01:59,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:01:59,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:01:59,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:01:59,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:01:59,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:01:59,688 INFO L87 Difference]: Start difference. First operand 392 states and 494 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 21:02:01,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:01,130 INFO L93 Difference]: Finished difference Result 436 states and 541 transitions. [2022-11-02 21:02:01,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:02:01,132 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 13 [2022-11-02 21:02:01,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:01,134 INFO L225 Difference]: With dead ends: 436 [2022-11-02 21:02:01,134 INFO L226 Difference]: Without dead ends: 436 [2022-11-02 21:02:01,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:02:01,135 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 59 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:01,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1152 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-02 21:02:01,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-11-02 21:02:01,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 404. [2022-11-02 21:02:01,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 250 states have (on average 1.804) internal successors, (451), 372 states have internal predecessors, (451), 21 states have call successors, (21), 11 states have call predecessors, (21), 13 states have return successors, (34), 22 states have call predecessors, (34), 21 states have call successors, (34) [2022-11-02 21:02:01,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 506 transitions. [2022-11-02 21:02:01,151 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 506 transitions. Word has length 13 [2022-11-02 21:02:01,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:01,152 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 506 transitions. [2022-11-02 21:02:01,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 21:02:01,152 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 506 transitions. [2022-11-02 21:02:01,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 21:02:01,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:01,153 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:01,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:01,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:01,365 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:02:01,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:01,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1981613462, now seen corresponding path program 1 times [2022-11-02 21:02:01,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:01,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1726137743] [2022-11-02 21:02:01,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:01,366 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:01,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:01,367 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:01,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-02 21:02:01,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:01,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:02:01,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:01,704 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 21:02:01,716 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 21:02:01,771 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 21:02:01,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:01,771 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:01,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1726137743] [2022-11-02 21:02:01,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1726137743] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:01,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:01,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:02:01,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170956540] [2022-11-02 21:02:01,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:01,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:02:01,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:01,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:02:01,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:02:01,774 INFO L87 Difference]: Start difference. First operand 404 states and 506 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 21:02:03,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:03,524 INFO L93 Difference]: Finished difference Result 424 states and 522 transitions. [2022-11-02 21:02:03,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:02:03,525 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 13 [2022-11-02 21:02:03,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:03,528 INFO L225 Difference]: With dead ends: 424 [2022-11-02 21:02:03,528 INFO L226 Difference]: Without dead ends: 424 [2022-11-02 21:02:03,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:02:03,529 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 33 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:03,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1291 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-02 21:02:03,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-11-02 21:02:03,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 413. [2022-11-02 21:02:03,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 259 states have (on average 1.7915057915057915) internal successors, (464), 381 states have internal predecessors, (464), 21 states have call successors, (21), 11 states have call predecessors, (21), 13 states have return successors, (34), 22 states have call predecessors, (34), 21 states have call successors, (34) [2022-11-02 21:02:03,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 519 transitions. [2022-11-02 21:02:03,545 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 519 transitions. Word has length 13 [2022-11-02 21:02:03,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:03,545 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 519 transitions. [2022-11-02 21:02:03,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 21:02:03,546 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 519 transitions. [2022-11-02 21:02:03,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 21:02:03,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:03,547 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:03,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:03,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:03,760 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr86ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:02:03,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:03,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1895308392, now seen corresponding path program 1 times [2022-11-02 21:02:03,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:03,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1541087754] [2022-11-02 21:02:03,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:03,762 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:03,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:03,769 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:03,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-02 21:02:03,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:03,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:02:03,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:03,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:02:03,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:03,973 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:03,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1541087754] [2022-11-02 21:02:03,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1541087754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:03,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:03,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:02:03,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697796980] [2022-11-02 21:02:03,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:03,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:02:03,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:03,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:02:03,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:02:03,981 INFO L87 Difference]: Start difference. First operand 413 states and 519 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 21:02:04,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:04,077 INFO L93 Difference]: Finished difference Result 351 states and 397 transitions. [2022-11-02 21:02:04,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:02:04,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-11-02 21:02:04,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:04,080 INFO L225 Difference]: With dead ends: 351 [2022-11-02 21:02:04,080 INFO L226 Difference]: Without dead ends: 351 [2022-11-02 21:02:04,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:02:04,081 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 10 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:04,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 1342 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:02:04,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-11-02 21:02:04,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 345. [2022-11-02 21:02:04,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 199 states have (on average 1.7688442211055277) internal successors, (352), 320 states have internal predecessors, (352), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-02 21:02:04,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 387 transitions. [2022-11-02 21:02:04,104 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 387 transitions. Word has length 17 [2022-11-02 21:02:04,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:04,104 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 387 transitions. [2022-11-02 21:02:04,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 21:02:04,104 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 387 transitions. [2022-11-02 21:02:04,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 21:02:04,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:04,105 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:04,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:04,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:04,318 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr86ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:02:04,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:04,319 INFO L85 PathProgramCache]: Analyzing trace with hash -2106255897, now seen corresponding path program 1 times [2022-11-02 21:02:04,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:04,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716880862] [2022-11-02 21:02:04,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:04,319 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:04,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:04,320 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:04,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-02 21:02:04,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:04,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:02:04,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:04,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:02:04,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:02:04,502 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:04,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716880862] [2022-11-02 21:02:04,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716880862] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:02:04,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:02:04,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-11-02 21:02:04,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810017653] [2022-11-02 21:02:04,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:04,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:02:04,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:04,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:02:04,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:02:04,504 INFO L87 Difference]: Start difference. First operand 345 states and 387 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 21:02:04,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:04,607 INFO L93 Difference]: Finished difference Result 344 states and 386 transitions. [2022-11-02 21:02:04,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:02:04,608 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), 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 21:02:04,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:04,610 INFO L225 Difference]: With dead ends: 344 [2022-11-02 21:02:04,610 INFO L226 Difference]: Without dead ends: 344 [2022-11-02 21:02:04,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 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 21:02:04,611 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 256 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:04,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 1052 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:02:04,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-11-02 21:02:04,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2022-11-02 21:02:04,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 199 states have (on average 1.763819095477387) internal successors, (351), 319 states have internal predecessors, (351), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-02 21:02:04,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 386 transitions. [2022-11-02 21:02:04,622 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 386 transitions. Word has length 17 [2022-11-02 21:02:04,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:04,622 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 386 transitions. [2022-11-02 21:02:04,623 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), 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 21:02:04,623 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 386 transitions. [2022-11-02 21:02:04,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 21:02:04,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:04,624 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:04,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:04,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:04,835 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:02:04,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:04,836 INFO L85 PathProgramCache]: Analyzing trace with hash -2106256148, now seen corresponding path program 1 times [2022-11-02 21:02:04,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:04,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842089166] [2022-11-02 21:02:04,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:04,837 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:04,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:04,838 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:04,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-02 21:02:04,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:04,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:02:04,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:05,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:02:05,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:05,014 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:05,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842089166] [2022-11-02 21:02:05,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842089166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:05,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:05,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:02:05,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648239844] [2022-11-02 21:02:05,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:05,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:02:05,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:05,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:02:05,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:02:05,016 INFO L87 Difference]: Start difference. First operand 344 states and 386 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, (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 21:02:05,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:05,101 INFO L93 Difference]: Finished difference Result 388 states and 436 transitions. [2022-11-02 21:02:05,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:02:05,102 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, (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 17 [2022-11-02 21:02:05,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:05,105 INFO L225 Difference]: With dead ends: 388 [2022-11-02 21:02:05,105 INFO L226 Difference]: Without dead ends: 388 [2022-11-02 21:02:05,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:02:05,106 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 40 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1375 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:05,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1375 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:02:05,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-11-02 21:02:05,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 346. [2022-11-02 21:02:05,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 201 states have (on average 1.756218905472637) internal successors, (353), 320 states have internal predecessors, (353), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-02 21:02:05,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 388 transitions. [2022-11-02 21:02:05,117 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 388 transitions. Word has length 17 [2022-11-02 21:02:05,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:05,118 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 388 transitions. [2022-11-02 21:02:05,118 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, (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 21:02:05,118 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 388 transitions. [2022-11-02 21:02:05,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 21:02:05,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:05,119 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:05,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:05,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:05,342 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:02:05,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:05,343 INFO L85 PathProgramCache]: Analyzing trace with hash -2134885299, now seen corresponding path program 1 times [2022-11-02 21:02:05,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:05,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1529758212] [2022-11-02 21:02:05,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:05,343 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:05,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:05,345 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:05,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-02 21:02:05,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:05,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 21:02:05,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:05,474 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 21:02:05,620 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-02 21:02:05,621 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 21:02:05,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:02:05,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:07,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:02:07,895 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:07,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1529758212] [2022-11-02 21:02:07,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1529758212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:02:07,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:02:07,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2022-11-02 21:02:07,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962227337] [2022-11-02 21:02:07,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:07,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:02:07,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:07,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:02:07,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=40, Unknown=1, NotChecked=0, Total=56 [2022-11-02 21:02:07,897 INFO L87 Difference]: Start difference. First operand 346 states and 388 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 21:02:08,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:08,752 INFO L93 Difference]: Finished difference Result 353 states and 399 transitions. [2022-11-02 21:02:08,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:02:08,754 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 17 [2022-11-02 21:02:08,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:08,756 INFO L225 Difference]: With dead ends: 353 [2022-11-02 21:02:08,756 INFO L226 Difference]: Without dead ends: 353 [2022-11-02 21:02:08,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=20, Invalid=51, Unknown=1, NotChecked=0, Total=72 [2022-11-02 21:02:08,757 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 20 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:08,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1183 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 416 Invalid, 0 Unknown, 163 Unchecked, 0.8s Time] [2022-11-02 21:02:08,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-11-02 21:02:08,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 350. [2022-11-02 21:02:08,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 205 states have (on average 1.7414634146341463) internal successors, (357), 324 states have internal predecessors, (357), 16 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-02 21:02:08,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 392 transitions. [2022-11-02 21:02:08,767 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 392 transitions. Word has length 17 [2022-11-02 21:02:08,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:08,767 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 392 transitions. [2022-11-02 21:02:08,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 21:02:08,768 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 392 transitions. [2022-11-02 21:02:08,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 21:02:08,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:08,768 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:08,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:08,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:08,981 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:02:08,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:08,981 INFO L85 PathProgramCache]: Analyzing trace with hash -2134885298, now seen corresponding path program 1 times [2022-11-02 21:02:08,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:08,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1054327989] [2022-11-02 21:02:08,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:08,982 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:08,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:08,985 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:08,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-02 21:02:09,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:09,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 21:02:09,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:09,110 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 21:02:09,119 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 21:02:11,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:02:11,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 21:02:11,368 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 21:02:11,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-02 21:02:11,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:02:11,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:14,636 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:14,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1054327989] [2022-11-02 21:02:14,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1054327989] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:02:14,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1472903469] [2022-11-02 21:02:14,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:14,637 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 21:02:14,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 21:02:14,639 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 21:02:14,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-02 21:02:14,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:14,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 21:02:14,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:14,820 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 5 [2022-11-02 21:02:14,836 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 21:02:17,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:02:17,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 21:02:17,018 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 21:02:17,019 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 21:02:17,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:02:17,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:19,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1472903469] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:02:19,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:02:19,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-11-02 21:02:19,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776044371] [2022-11-02 21:02:19,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:19,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:02:19,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:19,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:02:19,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=86, Unknown=1, NotChecked=0, Total=110 [2022-11-02 21:02:19,657 INFO L87 Difference]: Start difference. First operand 350 states and 392 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 21:02:25,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:25,454 INFO L93 Difference]: Finished difference Result 634 states and 720 transitions. [2022-11-02 21:02:25,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:02:25,457 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-11-02 21:02:25,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:25,460 INFO L225 Difference]: With dead ends: 634 [2022-11-02 21:02:25,460 INFO L226 Difference]: Without dead ends: 634 [2022-11-02 21:02:25,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=32, Invalid=122, Unknown=2, NotChecked=0, Total=156 [2022-11-02 21:02:25,461 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 328 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 1769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 321 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:25,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 1296 Invalid, 1769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1397 Invalid, 0 Unknown, 321 Unchecked, 3.7s Time] [2022-11-02 21:02:25,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-11-02 21:02:25,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 364. [2022-11-02 21:02:25,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 216 states have (on average 1.7222222222222223) internal successors, (372), 335 states have internal predecessors, (372), 18 states have call successors, (18), 9 states have call predecessors, (18), 13 states have return successors, (30), 21 states have call predecessors, (30), 18 states have call successors, (30) [2022-11-02 21:02:25,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 420 transitions. [2022-11-02 21:02:25,475 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 420 transitions. Word has length 17 [2022-11-02 21:02:25,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:25,475 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 420 transitions. [2022-11-02 21:02:25,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 21:02:25,476 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 420 transitions. [2022-11-02 21:02:25,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 21:02:25,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:25,476 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:25,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:25,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:25,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt [2022-11-02 21:02:25,888 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr87ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:02:25,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:25,889 INFO L85 PathProgramCache]: Analyzing trace with hash -869422937, now seen corresponding path program 1 times [2022-11-02 21:02:25,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:25,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [813534235] [2022-11-02 21:02:25,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:25,889 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:25,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:25,890 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:25,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-02 21:02:25,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:25,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 21:02:25,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:26,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:02:26,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:02:26,320 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:26,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [813534235] [2022-11-02 21:02:26,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [813534235] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:02:26,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:02:26,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-11-02 21:02:26,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794650401] [2022-11-02 21:02:26,321 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:26,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:02:26,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:26,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:02:26,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:02:26,322 INFO L87 Difference]: Start difference. First operand 364 states and 420 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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 21:02:27,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:27,048 INFO L93 Difference]: Finished difference Result 367 states and 421 transitions. [2022-11-02 21:02:27,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 21:02:27,049 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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 18 [2022-11-02 21:02:27,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:27,052 INFO L225 Difference]: With dead ends: 367 [2022-11-02 21:02:27,052 INFO L226 Difference]: Without dead ends: 367 [2022-11-02 21:02:27,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:02:27,053 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 578 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 1332 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:27,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 1332 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 319 Invalid, 0 Unknown, 27 Unchecked, 0.7s Time] [2022-11-02 21:02:27,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-11-02 21:02:27,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 363. [2022-11-02 21:02:27,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 216 states have (on average 1.712962962962963) internal successors, (370), 334 states have internal predecessors, (370), 18 states have call successors, (18), 9 states have call predecessors, (18), 13 states have return successors, (30), 21 states have call predecessors, (30), 18 states have call successors, (30) [2022-11-02 21:02:27,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 418 transitions. [2022-11-02 21:02:27,063 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 418 transitions. Word has length 18 [2022-11-02 21:02:27,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:27,063 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 418 transitions. [2022-11-02 21:02:27,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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 21:02:27,064 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 418 transitions. [2022-11-02 21:02:27,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 21:02:27,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:27,065 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:27,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-11-02 21:02:27,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:27,276 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:02:27,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:27,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1883109288, now seen corresponding path program 1 times [2022-11-02 21:02:27,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:27,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [815818053] [2022-11-02 21:02:27,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:27,277 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:27,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:27,278 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:27,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-02 21:02:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:27,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:02:27,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:27,428 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 21:02:27,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:27,428 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:27,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [815818053] [2022-11-02 21:02:27,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [815818053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:27,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:27,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:02:27,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982273085] [2022-11-02 21:02:27,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:27,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:02:27,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:27,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:02:27,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:02:27,430 INFO L87 Difference]: Start difference. First operand 363 states and 418 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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 21:02:28,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:28,361 INFO L93 Difference]: Finished difference Result 366 states and 420 transitions. [2022-11-02 21:02:28,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 21:02:28,362 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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 18 [2022-11-02 21:02:28,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:28,364 INFO L225 Difference]: With dead ends: 366 [2022-11-02 21:02:28,364 INFO L226 Difference]: Without dead ends: 353 [2022-11-02 21:02:28,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 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 21:02:28,365 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 41 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:28,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 679 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 21:02:28,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-11-02 21:02:28,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2022-11-02 21:02:28,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 207 states have (on average 1.7391304347826086) internal successors, (360), 325 states have internal predecessors, (360), 18 states have call successors, (18), 9 states have call predecessors, (18), 12 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2022-11-02 21:02:28,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 407 transitions. [2022-11-02 21:02:28,374 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 407 transitions. Word has length 18 [2022-11-02 21:02:28,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:28,375 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 407 transitions. [2022-11-02 21:02:28,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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 21:02:28,375 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 407 transitions. [2022-11-02 21:02:28,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-02 21:02:28,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:28,377 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:28,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-11-02 21:02:28,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:28,589 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:02:28,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:28,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1969475052, now seen corresponding path program 1 times [2022-11-02 21:02:28,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:28,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405720769] [2022-11-02 21:02:28,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:28,590 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:28,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:28,591 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:28,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-02 21:02:28,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:28,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 21:02:28,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:28,814 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-02 21:02:28,815 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 21:02:28,979 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 21:02:28,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:02:28,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:29,091 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:29,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405720769] [2022-11-02 21:02:29,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405720769] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:02:29,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1050266006] [2022-11-02 21:02:29,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:29,092 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 21:02:29,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 21:02:29,094 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 21:02:29,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-02 21:02:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:29,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 21:02:29,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:29,284 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 9 treesize of output 3 [2022-11-02 21:02:29,371 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-02 21:02:29,371 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 21:02:29,512 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 21:02:29,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:02:29,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:29,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1050266006] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:02:29,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:02:29,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-11-02 21:02:29,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785308012] [2022-11-02 21:02:29,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:29,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:02:29,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:29,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:02:29,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:02:29,610 INFO L87 Difference]: Start difference. First operand 353 states and 407 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 21:02:30,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:30,600 INFO L93 Difference]: Finished difference Result 403 states and 459 transitions. [2022-11-02 21:02:30,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:02:30,606 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 21 [2022-11-02 21:02:30,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:30,608 INFO L225 Difference]: With dead ends: 403 [2022-11-02 21:02:30,608 INFO L226 Difference]: Without dead ends: 403 [2022-11-02 21:02:30,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:02:30,611 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 99 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:30,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 936 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 345 Invalid, 0 Unknown, 185 Unchecked, 0.9s Time] [2022-11-02 21:02:30,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-11-02 21:02:30,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 358. [2022-11-02 21:02:30,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 212 states have (on average 1.7264150943396226) internal successors, (366), 330 states have internal predecessors, (366), 18 states have call successors, (18), 9 states have call predecessors, (18), 12 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2022-11-02 21:02:30,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 413 transitions. [2022-11-02 21:02:30,623 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 413 transitions. Word has length 21 [2022-11-02 21:02:30,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:30,624 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 413 transitions. [2022-11-02 21:02:30,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 21:02:30,624 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 413 transitions. [2022-11-02 21:02:30,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-02 21:02:30,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:30,625 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:30,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:30,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:31,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt [2022-11-02 21:02:31,037 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:02:31,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:31,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1969475053, now seen corresponding path program 1 times [2022-11-02 21:02:31,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:31,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18907667] [2022-11-02 21:02:31,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:31,038 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:31,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:31,041 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:31,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-02 21:02:31,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:31,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 21:02:31,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:33,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:02:33,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 21:02:35,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:02:35,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:38,149 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:38,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18907667] [2022-11-02 21:02:38,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18907667] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:02:38,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1149682044] [2022-11-02 21:02:38,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:38,150 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 21:02:38,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 21:02:38,151 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 21:02:38,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-02 21:02:38,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:38,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:02:38,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:38,335 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 9 treesize of output 3 [2022-11-02 21:02:40,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:02:40,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 21:02:40,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:02:40,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:41,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1149682044] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:02:41,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:02:41,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-11-02 21:02:41,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218892878] [2022-11-02 21:02:41,002 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:41,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:02:41,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:41,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:02:41,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=61, Unknown=2, NotChecked=0, Total=90 [2022-11-02 21:02:41,004 INFO L87 Difference]: Start difference. First operand 358 states and 413 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 21:02:46,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:46,862 INFO L93 Difference]: Finished difference Result 449 states and 506 transitions. [2022-11-02 21:02:46,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:02:46,864 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-11-02 21:02:46,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:46,866 INFO L225 Difference]: With dead ends: 449 [2022-11-02 21:02:46,866 INFO L226 Difference]: Without dead ends: 449 [2022-11-02 21:02:46,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=60, Invalid=118, Unknown=4, NotChecked=0, Total=182 [2022-11-02 21:02:46,867 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 151 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:46,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 1095 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 499 Invalid, 0 Unknown, 205 Unchecked, 1.7s Time] [2022-11-02 21:02:46,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-11-02 21:02:46,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 384. [2022-11-02 21:02:46,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 236 states have (on average 1.7415254237288136) internal successors, (411), 354 states have internal predecessors, (411), 19 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (30), 21 states have call predecessors, (30), 19 states have call successors, (30) [2022-11-02 21:02:46,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 460 transitions. [2022-11-02 21:02:46,880 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 460 transitions. Word has length 21 [2022-11-02 21:02:46,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:46,881 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 460 transitions. [2022-11-02 21:02:46,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 21:02:46,881 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 460 transitions. [2022-11-02 21:02:46,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-02 21:02:46,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:46,882 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:46,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:47,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:47,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt [2022-11-02 21:02:47,297 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:02:47,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:47,297 INFO L85 PathProgramCache]: Analyzing trace with hash -2128978739, now seen corresponding path program 1 times [2022-11-02 21:02:47,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:47,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415155881] [2022-11-02 21:02:47,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:47,298 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:47,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:47,299 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:47,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-02 21:02:47,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:47,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:02:47,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:02:47,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:47,427 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:47,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415155881] [2022-11-02 21:02:47,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415155881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:47,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:47,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:02:47,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949885675] [2022-11-02 21:02:47,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:47,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:02:47,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:47,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:02:47,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:02:47,431 INFO L87 Difference]: Start difference. First operand 384 states and 460 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 21:02:47,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:47,534 INFO L93 Difference]: Finished difference Result 397 states and 459 transitions. [2022-11-02 21:02:47,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:02:47,535 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 21 [2022-11-02 21:02:47,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:47,537 INFO L225 Difference]: With dead ends: 397 [2022-11-02 21:02:47,537 INFO L226 Difference]: Without dead ends: 397 [2022-11-02 21:02:47,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 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 21:02:47,538 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 252 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:47,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 1222 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:02:47,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-11-02 21:02:47,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 381. [2022-11-02 21:02:47,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 233 states have (on average 1.7467811158798283) internal successors, (407), 351 states have internal predecessors, (407), 19 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (30), 21 states have call predecessors, (30), 19 states have call successors, (30) [2022-11-02 21:02:47,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 456 transitions. [2022-11-02 21:02:47,550 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 456 transitions. Word has length 21 [2022-11-02 21:02:47,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:47,550 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 456 transitions. [2022-11-02 21:02:47,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 21:02:47,551 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 456 transitions. [2022-11-02 21:02:47,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-02 21:02:47,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:47,551 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] [2022-11-02 21:02:47,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-11-02 21:02:47,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:47,764 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:02:47,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:47,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1415040467, now seen corresponding path program 1 times [2022-11-02 21:02:47,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:47,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343244475] [2022-11-02 21:02:47,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:47,765 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:47,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:47,766 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:47,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-02 21:02:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:47,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 21:02:47,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:47,941 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 21:02:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:02:47,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:47,968 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:47,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343244475] [2022-11-02 21:02:47,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [343244475] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:47,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:47,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:02:47,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222750001] [2022-11-02 21:02:47,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:47,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:02:47,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:47,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:02:47,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:02:47,970 INFO L87 Difference]: Start difference. First operand 381 states and 456 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 21:02:49,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:49,094 INFO L93 Difference]: Finished difference Result 422 states and 500 transitions. [2022-11-02 21:02:49,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:02:49,095 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-11-02 21:02:49,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:49,097 INFO L225 Difference]: With dead ends: 422 [2022-11-02 21:02:49,097 INFO L226 Difference]: Without dead ends: 422 [2022-11-02 21:02:49,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:02:49,098 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 57 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:49,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 1033 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 21:02:49,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-11-02 21:02:49,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 381. [2022-11-02 21:02:49,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 233 states have (on average 1.742489270386266) internal successors, (406), 351 states have internal predecessors, (406), 19 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (30), 21 states have call predecessors, (30), 19 states have call successors, (30) [2022-11-02 21:02:49,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 455 transitions. [2022-11-02 21:02:49,109 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 455 transitions. Word has length 23 [2022-11-02 21:02:49,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:49,110 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 455 transitions. [2022-11-02 21:02:49,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 21:02:49,110 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 455 transitions. [2022-11-02 21:02:49,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-02 21:02:49,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:49,111 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] [2022-11-02 21:02:49,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:49,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:49,323 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:02:49,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:49,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1415040466, now seen corresponding path program 1 times [2022-11-02 21:02:49,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:49,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1619694656] [2022-11-02 21:02:49,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:49,324 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:49,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:49,326 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:49,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-02 21:02:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:49,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 21:02:49,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:49,669 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 21:02:49,681 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 21:02:49,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:02:49,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:49,726 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:49,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1619694656] [2022-11-02 21:02:49,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1619694656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:49,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:49,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:02:49,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120504419] [2022-11-02 21:02:49,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:49,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:02:49,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:49,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:02:49,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:02:49,729 INFO L87 Difference]: Start difference. First operand 381 states and 455 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 21:02:51,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:51,048 INFO L93 Difference]: Finished difference Result 403 states and 477 transitions. [2022-11-02 21:02:51,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:02:51,050 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-11-02 21:02:51,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:51,052 INFO L225 Difference]: With dead ends: 403 [2022-11-02 21:02:51,052 INFO L226 Difference]: Without dead ends: 403 [2022-11-02 21:02:51,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:02:51,053 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 39 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:51,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 1084 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 21:02:51,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-11-02 21:02:51,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 381. [2022-11-02 21:02:51,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 233 states have (on average 1.738197424892704) internal successors, (405), 351 states have internal predecessors, (405), 19 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (30), 21 states have call predecessors, (30), 19 states have call successors, (30) [2022-11-02 21:02:51,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 454 transitions. [2022-11-02 21:02:51,064 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 454 transitions. Word has length 23 [2022-11-02 21:02:51,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:51,065 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 454 transitions. [2022-11-02 21:02:51,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 21:02:51,065 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 454 transitions. [2022-11-02 21:02:51,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 21:02:51,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:51,066 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:51,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-11-02 21:02:51,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:51,280 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr83ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:02:51,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:51,280 INFO L85 PathProgramCache]: Analyzing trace with hash -412937067, now seen corresponding path program 1 times [2022-11-02 21:02:51,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:51,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649660696] [2022-11-02 21:02:51,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:51,281 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:51,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:51,282 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:51,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-02 21:02:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:51,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:02:51,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:51,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:02:51,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:51,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:02:51,499 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:51,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649660696] [2022-11-02 21:02:51,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649660696] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:02:51,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:02:51,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-11-02 21:02:51,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579488674] [2022-11-02 21:02:51,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:51,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:02:51,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:51,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:02:51,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:02:51,501 INFO L87 Difference]: Start difference. First operand 381 states and 454 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:02:51,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:51,578 INFO L93 Difference]: Finished difference Result 380 states and 453 transitions. [2022-11-02 21:02:51,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:02:51,579 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-11-02 21:02:51,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:51,581 INFO L225 Difference]: With dead ends: 380 [2022-11-02 21:02:51,581 INFO L226 Difference]: Without dead ends: 380 [2022-11-02 21:02:51,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 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 21:02:51,582 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 248 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:51,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 1055 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:02:51,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-11-02 21:02:51,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2022-11-02 21:02:51,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 233 states have (on average 1.7339055793991416) internal successors, (404), 350 states have internal predecessors, (404), 19 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (30), 21 states have call predecessors, (30), 19 states have call successors, (30) [2022-11-02 21:02:51,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 453 transitions. [2022-11-02 21:02:51,593 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 453 transitions. Word has length 25 [2022-11-02 21:02:51,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:51,593 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 453 transitions. [2022-11-02 21:02:51,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:02:51,594 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 453 transitions. [2022-11-02 21:02:51,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 21:02:51,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:51,595 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:51,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:51,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:51,801 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:02:51,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:51,802 INFO L85 PathProgramCache]: Analyzing trace with hash -412937301, now seen corresponding path program 1 times [2022-11-02 21:02:51,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:51,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [611237941] [2022-11-02 21:02:51,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:51,803 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:51,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:51,804 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:51,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-02 21:02:51,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:51,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:02:51,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:51,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:02:51,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:51,949 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:51,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [611237941] [2022-11-02 21:02:51,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [611237941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:51,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:51,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:02:51,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509095597] [2022-11-02 21:02:51,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:51,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:02:51,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:51,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:02:51,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:02:51,954 INFO L87 Difference]: Start difference. First operand 380 states and 453 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:02:52,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:52,022 INFO L93 Difference]: Finished difference Result 415 states and 481 transitions. [2022-11-02 21:02:52,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:02:52,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-11-02 21:02:52,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:52,025 INFO L225 Difference]: With dead ends: 415 [2022-11-02 21:02:52,025 INFO L226 Difference]: Without dead ends: 415 [2022-11-02 21:02:52,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 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 21:02:52,026 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 44 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:52,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 1438 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:02:52,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-11-02 21:02:52,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 371. [2022-11-02 21:02:52,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 226 states have (on average 1.7345132743362832) internal successors, (392), 343 states have internal predecessors, (392), 17 states have call successors, (17), 10 states have call predecessors, (17), 13 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2022-11-02 21:02:52,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 435 transitions. [2022-11-02 21:02:52,033 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 435 transitions. Word has length 25 [2022-11-02 21:02:52,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:52,034 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 435 transitions. [2022-11-02 21:02:52,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:02:52,034 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 435 transitions. [2022-11-02 21:02:52,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 21:02:52,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:52,035 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:52,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-11-02 21:02:52,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:52,247 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:02:52,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:52,248 INFO L85 PathProgramCache]: Analyzing trace with hash -441566452, now seen corresponding path program 1 times [2022-11-02 21:02:52,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:52,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164867300] [2022-11-02 21:02:52,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:52,248 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:52,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:52,249 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:52,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-02 21:02:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:52,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 21:02:52,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:52,363 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 21:02:52,471 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-02 21:02:52,471 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 21:02:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:02:52,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:02:52,681 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:52,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164867300] [2022-11-02 21:02:52,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164867300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:02:52,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:02:52,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2022-11-02 21:02:52,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981785394] [2022-11-02 21:02:52,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:52,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:02:52,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:52,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:02:52,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:02:52,683 INFO L87 Difference]: Start difference. First operand 371 states and 435 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 21:02:54,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:54,715 INFO L93 Difference]: Finished difference Result 515 states and 605 transitions. [2022-11-02 21:02:54,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:02:54,716 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2022-11-02 21:02:54,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:54,717 INFO L225 Difference]: With dead ends: 515 [2022-11-02 21:02:54,718 INFO L226 Difference]: Without dead ends: 515 [2022-11-02 21:02:54,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:02:54,718 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 182 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:54,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 1304 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 733 Invalid, 0 Unknown, 223 Unchecked, 2.0s Time] [2022-11-02 21:02:54,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-11-02 21:02:54,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 373. [2022-11-02 21:02:54,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 229 states have (on average 1.724890829694323) internal successors, (395), 345 states have internal predecessors, (395), 17 states have call successors, (17), 10 states have call predecessors, (17), 13 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2022-11-02 21:02:54,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 438 transitions. [2022-11-02 21:02:54,729 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 438 transitions. Word has length 25 [2022-11-02 21:02:54,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:54,729 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 438 transitions. [2022-11-02 21:02:54,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 21:02:54,730 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 438 transitions. [2022-11-02 21:02:54,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 21:02:54,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:54,730 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:54,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:54,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:54,943 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:02:54,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:54,943 INFO L85 PathProgramCache]: Analyzing trace with hash -441566451, now seen corresponding path program 1 times [2022-11-02 21:02:54,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:54,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971409960] [2022-11-02 21:02:54,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:54,944 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:54,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:54,949 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:54,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-02 21:02:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:55,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 21:02:55,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:55,104 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 21:02:59,362 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-02 21:02:59,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 21:02:59,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:02:59,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:59,706 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:59,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971409960] [2022-11-02 21:02:59,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1971409960] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:02:59,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1716233906] [2022-11-02 21:02:59,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:59,707 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 21:02:59,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 21:02:59,708 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 21:02:59,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-02 21:02:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:59,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 21:02:59,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:59,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 21:02:59,930 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 21:03:02,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:03:02,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 21:03:02,327 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 21:03:02,327 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 21:03:02,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:03:02,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:04,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1716233906] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:03:04,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:03:04,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-11-02 21:03:04,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119696133] [2022-11-02 21:03:04,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:04,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 21:03:04,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:04,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 21:03:04,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=226, Unknown=3, NotChecked=0, Total=272 [2022-11-02 21:03:04,816 INFO L87 Difference]: Start difference. First operand 373 states and 438 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-02 21:03:12,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:12,605 INFO L93 Difference]: Finished difference Result 645 states and 746 transitions. [2022-11-02 21:03:12,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:03:12,606 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 25 [2022-11-02 21:03:12,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:12,607 INFO L225 Difference]: With dead ends: 645 [2022-11-02 21:03:12,607 INFO L226 Difference]: Without dead ends: 645 [2022-11-02 21:03:12,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=56, Invalid=282, Unknown=4, NotChecked=0, Total=342 [2022-11-02 21:03:12,608 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 507 mSDsluCounter, 1930 mSDsCounter, 0 mSdLazyCounter, 1698 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 2275 SdHoareTripleChecker+Invalid, 2313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 547 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:12,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 2275 Invalid, 2313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1698 Invalid, 0 Unknown, 547 Unchecked, 5.6s Time] [2022-11-02 21:03:12,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-11-02 21:03:12,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 372. [2022-11-02 21:03:12,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 229 states have (on average 1.720524017467249) internal successors, (394), 344 states have internal predecessors, (394), 17 states have call successors, (17), 10 states have call predecessors, (17), 13 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2022-11-02 21:03:12,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 437 transitions. [2022-11-02 21:03:12,619 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 437 transitions. Word has length 25 [2022-11-02 21:03:12,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:12,619 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 437 transitions. [2022-11-02 21:03:12,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-02 21:03:12,620 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 437 transitions. [2022-11-02 21:03:12,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 21:03:12,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:12,620 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:12,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:12,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:13,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt [2022-11-02 21:03:13,033 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr84ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:03:13,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:13,033 INFO L85 PathProgramCache]: Analyzing trace with hash 83853234, now seen corresponding path program 1 times [2022-11-02 21:03:13,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:13,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297810611] [2022-11-02 21:03:13,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:13,034 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:13,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:13,035 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:13,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-02 21:03:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:13,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:03:13,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:03:13,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:13,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:03:13,865 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:13,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297810611] [2022-11-02 21:03:13,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297810611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:03:13,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:03:13,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-11-02 21:03:13,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581720427] [2022-11-02 21:03:13,866 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:13,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:03:13,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:13,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:03:13,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:03:13,867 INFO L87 Difference]: Start difference. First operand 372 states and 437 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 21:03:14,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:14,264 INFO L93 Difference]: Finished difference Result 606 states and 700 transitions. [2022-11-02 21:03:14,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:03:14,264 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 26 [2022-11-02 21:03:14,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:14,267 INFO L225 Difference]: With dead ends: 606 [2022-11-02 21:03:14,267 INFO L226 Difference]: Without dead ends: 606 [2022-11-02 21:03:14,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:03:14,268 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 324 mSDsluCounter, 1954 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 2300 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:14,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 2300 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 139 Invalid, 0 Unknown, 207 Unchecked, 0.4s Time] [2022-11-02 21:03:14,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-11-02 21:03:14,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 473. [2022-11-02 21:03:14,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 316 states have (on average 1.7563291139240507) internal successors, (555), 431 states have internal predecessors, (555), 27 states have call successors, (27), 16 states have call predecessors, (27), 20 states have return successors, (41), 29 states have call predecessors, (41), 27 states have call successors, (41) [2022-11-02 21:03:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 623 transitions. [2022-11-02 21:03:14,280 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 623 transitions. Word has length 26 [2022-11-02 21:03:14,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:14,280 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 623 transitions. [2022-11-02 21:03:14,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 21:03:14,281 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 623 transitions. [2022-11-02 21:03:14,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 21:03:14,281 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:14,282 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 21:03:14,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-11-02 21:03:14,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:14,495 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr93REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:03:14,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:14,496 INFO L85 PathProgramCache]: Analyzing trace with hash -366162574, now seen corresponding path program 1 times [2022-11-02 21:03:14,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:14,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433964482] [2022-11-02 21:03:14,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:14,497 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:14,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:14,498 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:14,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-02 21:03:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:14,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 21:03:14,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:15,028 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 21:03:15,038 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 21:03:15,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:03:15,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:15,190 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:15,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1433964482] [2022-11-02 21:03:15,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1433964482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:15,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:15,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:03:15,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762141122] [2022-11-02 21:03:15,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:15,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:03:15,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:15,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:03:15,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:03:15,191 INFO L87 Difference]: Start difference. First operand 473 states and 623 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 21:03:15,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:15,903 INFO L93 Difference]: Finished difference Result 455 states and 584 transitions. [2022-11-02 21:03:15,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:03:15,904 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-11-02 21:03:15,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:15,907 INFO L225 Difference]: With dead ends: 455 [2022-11-02 21:03:15,908 INFO L226 Difference]: Without dead ends: 455 [2022-11-02 21:03:15,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:03:15,909 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 12 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1249 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:15,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1249 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 21:03:15,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-11-02 21:03:15,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 451. [2022-11-02 21:03:15,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 296 states have (on average 1.739864864864865) internal successors, (515), 411 states have internal predecessors, (515), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (40), 28 states have call predecessors, (40), 26 states have call successors, (40) [2022-11-02 21:03:15,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 581 transitions. [2022-11-02 21:03:15,929 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 581 transitions. Word has length 26 [2022-11-02 21:03:15,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:15,930 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 581 transitions. [2022-11-02 21:03:15,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 21:03:15,930 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 581 transitions. [2022-11-02 21:03:15,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 21:03:15,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:15,931 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 21:03:15,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:16,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:16,144 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:03:16,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:16,145 INFO L85 PathProgramCache]: Analyzing trace with hash 305064464, now seen corresponding path program 1 times [2022-11-02 21:03:16,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:16,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [998631987] [2022-11-02 21:03:16,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:16,145 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:16,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:16,147 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:16,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-02 21:03:16,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:16,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 21:03:16,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:03:16,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:21,055 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:21,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [998631987] [2022-11-02 21:03:21,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [998631987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:03:21,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [143298850] [2022-11-02 21:03:21,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:21,056 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 21:03:21,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 21:03:21,058 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 21:03:21,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-02 21:03:21,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:21,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 21:03:21,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:03:21,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:25,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [143298850] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:03:25,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:03:25,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2022-11-02 21:03:25,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409508628] [2022-11-02 21:03:25,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:25,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 21:03:25,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:25,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 21:03:25,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=166, Unknown=2, NotChecked=0, Total=210 [2022-11-02 21:03:25,966 INFO L87 Difference]: Start difference. First operand 451 states and 581 transitions. Second operand has 12 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 21:03:27,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:27,591 INFO L93 Difference]: Finished difference Result 454 states and 583 transitions. [2022-11-02 21:03:27,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 21:03:27,593 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 28 [2022-11-02 21:03:27,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:27,594 INFO L225 Difference]: With dead ends: 454 [2022-11-02 21:03:27,594 INFO L226 Difference]: Without dead ends: 438 [2022-11-02 21:03:27,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=50, Invalid=220, Unknown=2, NotChecked=0, Total=272 [2022-11-02 21:03:27,595 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 60 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1944 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 637 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:27,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 1944 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 419 Invalid, 0 Unknown, 637 Unchecked, 1.5s Time] [2022-11-02 21:03:27,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-11-02 21:03:27,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 438. [2022-11-02 21:03:27,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 284 states have (on average 1.767605633802817) internal successors, (502), 399 states have internal predecessors, (502), 26 states have call successors, (26), 15 states have call predecessors, (26), 18 states have return successors, (39), 27 states have call predecessors, (39), 26 states have call successors, (39) [2022-11-02 21:03:27,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 567 transitions. [2022-11-02 21:03:27,607 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 567 transitions. Word has length 28 [2022-11-02 21:03:27,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:27,608 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 567 transitions. [2022-11-02 21:03:27,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 21:03:27,608 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 567 transitions. [2022-11-02 21:03:27,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-02 21:03:27,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:27,609 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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 21:03:27,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-02 21:03:27,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:28,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt [2022-11-02 21:03:28,024 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr88ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:03:28,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:28,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1975256279, now seen corresponding path program 1 times [2022-11-02 21:03:28,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:28,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1472807392] [2022-11-02 21:03:28,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:28,025 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:28,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:28,026 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:28,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-02 21:03:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:28,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 21:03:28,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:28,145 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 21:03:28,322 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-02 21:03:28,323 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 21:03:28,501 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 21:03:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:03:28,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:29,045 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:03:29,045 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:29,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1472807392] [2022-11-02 21:03:29,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1472807392] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:03:29,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:03:29,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2022-11-02 21:03:29,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463249018] [2022-11-02 21:03:29,046 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:29,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 21:03:29,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:29,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 21:03:29,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-02 21:03:29,048 INFO L87 Difference]: Start difference. First operand 438 states and 567 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-02 21:03:35,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:35,471 INFO L93 Difference]: Finished difference Result 736 states and 847 transitions. [2022-11-02 21:03:35,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 21:03:35,473 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 30 [2022-11-02 21:03:35,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:35,474 INFO L225 Difference]: With dead ends: 736 [2022-11-02 21:03:35,474 INFO L226 Difference]: Without dead ends: 736 [2022-11-02 21:03:35,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-02 21:03:35,475 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 466 mSDsluCounter, 2586 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 2948 SdHoareTripleChecker+Invalid, 2617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 483 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:35,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 2948 Invalid, 2617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2060 Invalid, 0 Unknown, 483 Unchecked, 6.3s Time] [2022-11-02 21:03:35,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-11-02 21:03:35,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 444. [2022-11-02 21:03:35,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 290 states have (on average 1.7517241379310344) internal successors, (508), 404 states have internal predecessors, (508), 26 states have call successors, (26), 15 states have call predecessors, (26), 18 states have return successors, (39), 28 states have call predecessors, (39), 26 states have call successors, (39) [2022-11-02 21:03:35,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 573 transitions. [2022-11-02 21:03:35,488 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 573 transitions. Word has length 30 [2022-11-02 21:03:35,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:35,488 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 573 transitions. [2022-11-02 21:03:35,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-02 21:03:35,489 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 573 transitions. [2022-11-02 21:03:35,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-02 21:03:35,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:35,490 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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 21:03:35,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:35,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:35,703 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:03:35,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:35,703 INFO L85 PathProgramCache]: Analyzing trace with hash -154246822, now seen corresponding path program 1 times [2022-11-02 21:03:35,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:35,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843324560] [2022-11-02 21:03:35,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:35,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:35,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:35,705 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:35,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-02 21:03:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:35,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 21:03:35,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:36,015 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-02 21:03:36,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-02 21:03:36,223 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-02 21:03:36,223 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 21:03:36,511 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 21:03:36,563 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 21:03:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:03:36,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:36,809 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:36,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843324560] [2022-11-02 21:03:36,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843324560] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:03:36,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1524446653] [2022-11-02 21:03:36,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:36,810 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 21:03:36,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 21:03:36,811 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 21:03:36,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-02 21:03:37,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:37,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 21:03:37,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:37,101 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 9 treesize of output 3 [2022-11-02 21:03:37,231 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-02 21:03:37,231 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 21:03:37,455 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-02 21:03:37,455 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 21:03:37,925 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 18 [2022-11-02 21:03:38,210 INFO L356 Elim1Store]: treesize reduction 32, result has 27.3 percent of original size [2022-11-02 21:03:38,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 39 [2022-11-02 21:03:38,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:03:38,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:38,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1524446653] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:03:38,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:03:38,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 13 [2022-11-02 21:03:38,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006135776] [2022-11-02 21:03:38,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:38,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 21:03:38,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:38,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 21:03:38,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2022-11-02 21:03:38,694 INFO L87 Difference]: Start difference. First operand 444 states and 573 transitions. Second operand has 15 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 21:03:43,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:43,199 INFO L93 Difference]: Finished difference Result 454 states and 583 transitions. [2022-11-02 21:03:43,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 21:03:43,200 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 32 [2022-11-02 21:03:43,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:43,202 INFO L225 Difference]: With dead ends: 454 [2022-11-02 21:03:43,202 INFO L226 Difference]: Without dead ends: 454 [2022-11-02 21:03:43,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=138, Invalid=413, Unknown=1, NotChecked=0, Total=552 [2022-11-02 21:03:43,203 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 14 mSDsluCounter, 1565 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1885 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:43,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1885 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 780 Invalid, 0 Unknown, 299 Unchecked, 2.3s Time] [2022-11-02 21:03:43,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-11-02 21:03:43,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 454. [2022-11-02 21:03:43,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 299 states have (on average 1.7324414715719063) internal successors, (518), 414 states have internal predecessors, (518), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (39), 28 states have call predecessors, (39), 26 states have call successors, (39) [2022-11-02 21:03:43,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 583 transitions. [2022-11-02 21:03:43,215 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 583 transitions. Word has length 32 [2022-11-02 21:03:43,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:43,216 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 583 transitions. [2022-11-02 21:03:43,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 21:03:43,216 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 583 transitions. [2022-11-02 21:03:43,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-02 21:03:43,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:43,217 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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 21:03:43,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:43,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:43,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt [2022-11-02 21:03:43,635 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:03:43,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:43,635 INFO L85 PathProgramCache]: Analyzing trace with hash -154246821, now seen corresponding path program 1 times [2022-11-02 21:03:43,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:43,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557048798] [2022-11-02 21:03:43,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:43,636 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:43,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:43,637 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:43,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-02 21:03:43,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:43,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 21:03:43,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:46,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:03:46,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 21:03:56,379 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 21:03:56,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-02 21:03:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 4 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:03:56,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:57,724 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:57,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557048798] [2022-11-02 21:03:57,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557048798] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:03:57,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [889749480] [2022-11-02 21:03:57,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:57,724 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 21:03:57,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 21:03:57,725 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 21:03:57,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-02 21:03:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:57,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 21:03:57,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:58,013 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 9 treesize of output 3 [2022-11-02 21:03:58,239 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 21:03:58,240 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 21:03:58,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 21:03:58,431 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 21:03:58,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-02 21:03:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:03:58,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:59,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [889749480] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:03:59,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:03:59,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2022-11-02 21:03:59,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900658445] [2022-11-02 21:03:59,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:59,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 21:03:59,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:59,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 21:03:59,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=154, Unknown=6, NotChecked=0, Total=210 [2022-11-02 21:03:59,417 INFO L87 Difference]: Start difference. First operand 454 states and 583 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (3), 2 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 21:04:09,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:09,113 INFO L93 Difference]: Finished difference Result 454 states and 582 transitions. [2022-11-02 21:04:09,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 21:04:09,115 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (3), 2 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 32 [2022-11-02 21:04:09,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:09,116 INFO L225 Difference]: With dead ends: 454 [2022-11-02 21:04:09,116 INFO L226 Difference]: Without dead ends: 454 [2022-11-02 21:04:09,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=123, Invalid=373, Unknown=10, NotChecked=0, Total=506 [2022-11-02 21:04:09,117 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 14 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1536 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 557 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:09,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1536 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 251 Invalid, 0 Unknown, 557 Unchecked, 1.2s Time] [2022-11-02 21:04:09,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-11-02 21:04:09,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 454. [2022-11-02 21:04:09,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 299 states have (on average 1.7290969899665551) internal successors, (517), 414 states have internal predecessors, (517), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (39), 28 states have call predecessors, (39), 26 states have call successors, (39) [2022-11-02 21:04:09,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 582 transitions. [2022-11-02 21:04:09,128 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 582 transitions. Word has length 32 [2022-11-02 21:04:09,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:09,129 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 582 transitions. [2022-11-02 21:04:09,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (3), 2 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 21:04:09,129 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 582 transitions. [2022-11-02 21:04:09,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-02 21:04:09,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:09,130 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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 21:04:09,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-02 21:04:09,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:09,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt [2022-11-02 21:04:09,551 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:04:09,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:09,552 INFO L85 PathProgramCache]: Analyzing trace with hash 139156185, now seen corresponding path program 1 times [2022-11-02 21:04:09,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:09,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690144870] [2022-11-02 21:04:09,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:09,552 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:09,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:09,553 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:09,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-02 21:04:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:09,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:04:09,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:04:09,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:04:09,719 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:09,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690144870] [2022-11-02 21:04:09,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690144870] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:09,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:09,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:04:09,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348918928] [2022-11-02 21:04:09,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:09,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:04:09,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:09,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:04:09,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:04:09,721 INFO L87 Difference]: Start difference. First operand 454 states and 582 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:04:09,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:09,807 INFO L93 Difference]: Finished difference Result 479 states and 608 transitions. [2022-11-02 21:04:09,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:04:09,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2022-11-02 21:04:09,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:09,810 INFO L225 Difference]: With dead ends: 479 [2022-11-02 21:04:09,810 INFO L226 Difference]: Without dead ends: 479 [2022-11-02 21:04:09,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 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 21:04:09,811 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 245 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:09,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 1232 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:04:09,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-11-02 21:04:09,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 448. [2022-11-02 21:04:09,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 293 states have (on average 1.7406143344709897) internal successors, (510), 408 states have internal predecessors, (510), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (39), 28 states have call predecessors, (39), 26 states have call successors, (39) [2022-11-02 21:04:09,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 575 transitions. [2022-11-02 21:04:09,824 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 575 transitions. Word has length 32 [2022-11-02 21:04:09,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:09,824 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 575 transitions. [2022-11-02 21:04:09,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:04:09,825 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 575 transitions. [2022-11-02 21:04:09,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-02 21:04:09,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:09,825 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 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 21:04:09,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-02 21:04:10,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:10,040 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr80ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:04:10,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:10,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1682263433, now seen corresponding path program 1 times [2022-11-02 21:04:10,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:10,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742355719] [2022-11-02 21:04:10,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:10,041 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:10,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:10,042 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:10,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-02 21:04:10,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:10,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:04:10,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:10,224 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 21:04:10,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:10,287 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 21:04:10,287 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:10,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742355719] [2022-11-02 21:04:10,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742355719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:04:10,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:04:10,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-11-02 21:04:10,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171228539] [2022-11-02 21:04:10,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:04:10,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:04:10,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:10,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:04:10,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:04:10,289 INFO L87 Difference]: Start difference. First operand 448 states and 575 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 21:04:10,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:10,370 INFO L93 Difference]: Finished difference Result 447 states and 574 transitions. [2022-11-02 21:04:10,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:04:10,371 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2022-11-02 21:04:10,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:10,373 INFO L225 Difference]: With dead ends: 447 [2022-11-02 21:04:10,374 INFO L226 Difference]: Without dead ends: 447 [2022-11-02 21:04:10,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 61 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 21:04:10,374 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 241 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:10,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 1053 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:04:10,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-11-02 21:04:10,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2022-11-02 21:04:10,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 293 states have (on average 1.7372013651877134) internal successors, (509), 407 states have internal predecessors, (509), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (39), 28 states have call predecessors, (39), 26 states have call successors, (39) [2022-11-02 21:04:10,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 574 transitions. [2022-11-02 21:04:10,386 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 574 transitions. Word has length 33 [2022-11-02 21:04:10,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:10,386 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 574 transitions. [2022-11-02 21:04:10,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 21:04:10,387 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 574 transitions. [2022-11-02 21:04:10,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-02 21:04:10,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:10,387 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 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 21:04:10,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:10,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:10,602 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:04:10,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:10,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1682263217, now seen corresponding path program 1 times [2022-11-02 21:04:10,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:10,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [673817929] [2022-11-02 21:04:10,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:10,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:10,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:10,605 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:10,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-02 21:04:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:10,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:04:10,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:10,852 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 21:04:10,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:04:10,852 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:10,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [673817929] [2022-11-02 21:04:10,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [673817929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:10,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:10,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:04:10,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231487665] [2022-11-02 21:04:10,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:10,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:04:10,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:10,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:04:10,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:04:10,854 INFO L87 Difference]: Start difference. First operand 447 states and 574 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:04:10,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:10,928 INFO L93 Difference]: Finished difference Result 407 states and 451 transitions. [2022-11-02 21:04:10,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:04:10,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2022-11-02 21:04:10,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:10,931 INFO L225 Difference]: With dead ends: 407 [2022-11-02 21:04:10,932 INFO L226 Difference]: Without dead ends: 407 [2022-11-02 21:04:10,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 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 21:04:10,933 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 49 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:10,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 1438 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:04:10,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-11-02 21:04:10,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 358. [2022-11-02 21:04:10,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 215 states have (on average 1.6744186046511629) internal successors, (360), 329 states have internal predecessors, (360), 16 states have call successors, (16), 11 states have call predecessors, (16), 15 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2022-11-02 21:04:10,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 400 transitions. [2022-11-02 21:04:10,942 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 400 transitions. Word has length 33 [2022-11-02 21:04:10,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:10,942 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 400 transitions. [2022-11-02 21:04:10,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:04:10,943 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 400 transitions. [2022-11-02 21:04:10,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-02 21:04:10,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:10,943 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:04:10,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-11-02 21:04:11,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:11,157 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:04:11,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:11,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1653634065, now seen corresponding path program 1 times [2022-11-02 21:04:11,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:11,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686635496] [2022-11-02 21:04:11,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:11,158 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:11,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:11,159 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:11,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-02 21:04:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:11,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 21:04:11,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:11,427 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-02 21:04:11,427 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 21:04:13,523 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-02 21:04:13,525 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 21:04:13,550 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 0 refuted. 2 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:04:13,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:18,369 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:04:18,370 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:18,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686635496] [2022-11-02 21:04:18,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686635496] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 21:04:18,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:04:18,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-02 21:04:18,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65383974] [2022-11-02 21:04:18,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:18,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:04:18,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:18,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:04:18,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=26, Unknown=2, NotChecked=0, Total=42 [2022-11-02 21:04:18,372 INFO L87 Difference]: Start difference. First operand 358 states and 400 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 21:04:18,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:18,855 INFO L93 Difference]: Finished difference Result 362 states and 404 transitions. [2022-11-02 21:04:18,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 21:04:18,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2022-11-02 21:04:18,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:18,859 INFO L225 Difference]: With dead ends: 362 [2022-11-02 21:04:18,859 INFO L226 Difference]: Without dead ends: 362 [2022-11-02 21:04:18,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=14, Invalid=26, Unknown=2, NotChecked=0, Total=42 [2022-11-02 21:04:18,860 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 22 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:18,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 702 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 151 Unchecked, 0.5s Time] [2022-11-02 21:04:18,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-11-02 21:04:18,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 357. [2022-11-02 21:04:18,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 215 states have (on average 1.669767441860465) internal successors, (359), 328 states have internal predecessors, (359), 16 states have call successors, (16), 11 states have call predecessors, (16), 15 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2022-11-02 21:04:18,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 399 transitions. [2022-11-02 21:04:18,868 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 399 transitions. Word has length 33 [2022-11-02 21:04:18,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:18,869 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 399 transitions. [2022-11-02 21:04:18,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 21:04:18,869 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 399 transitions. [2022-11-02 21:04:18,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-02 21:04:18,870 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:18,870 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:04:18,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:19,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:19,085 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:04:19,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:19,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1653634066, now seen corresponding path program 1 times [2022-11-02 21:04:19,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:19,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1377653401] [2022-11-02 21:04:19,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:19,086 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:19,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:19,087 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:19,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-02 21:04:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:19,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 21:04:19,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:19,251 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 21:04:19,264 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 21:04:19,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:04:19,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 21:04:19,545 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 21:04:19,546 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 21:04:19,824 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-02 21:04:19,825 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 21:04:19,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 21:04:21,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:04:21,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 21:04:21,998 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 21:04:21,998 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 21:04:22,019 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:04:22,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:24,492 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:24,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1377653401] [2022-11-02 21:04:24,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1377653401] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:04:24,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1689771106] [2022-11-02 21:04:24,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:24,492 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 21:04:24,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 21:04:24,493 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 21:04:24,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-02 21:04:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:24,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-02 21:04:24,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:24,810 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 21:04:24,824 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 21:04:25,030 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 21:04:25,030 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 21:04:25,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 21:04:25,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:04:25,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 21:04:25,343 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-02 21:04:25,343 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 21:04:25,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:04:25,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 21:04:25,568 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 21:04:25,568 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 21:04:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:04:25,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:25,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1689771106] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:04:25,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:04:25,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 11 [2022-11-02 21:04:25,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282975353] [2022-11-02 21:04:25,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:04:25,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 21:04:25,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:25,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 21:04:25,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-02 21:04:25,974 INFO L87 Difference]: Start difference. First operand 357 states and 399 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 21:04:33,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:33,583 INFO L93 Difference]: Finished difference Result 610 states and 683 transitions. [2022-11-02 21:04:33,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:04:33,584 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-11-02 21:04:33,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:33,587 INFO L225 Difference]: With dead ends: 610 [2022-11-02 21:04:33,587 INFO L226 Difference]: Without dead ends: 610 [2022-11-02 21:04:33,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=44, Invalid=195, Unknown=1, NotChecked=0, Total=240 [2022-11-02 21:04:33,588 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 313 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 1652 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1735 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:33,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 1735 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1652 Invalid, 0 Unknown, 268 Unchecked, 5.4s Time] [2022-11-02 21:04:33,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-11-02 21:04:33,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 356. [2022-11-02 21:04:33,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 215 states have (on average 1.6604651162790698) internal successors, (357), 327 states have internal predecessors, (357), 16 states have call successors, (16), 11 states have call predecessors, (16), 15 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2022-11-02 21:04:33,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 397 transitions. [2022-11-02 21:04:33,598 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 397 transitions. Word has length 33 [2022-11-02 21:04:33,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:33,598 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 397 transitions. [2022-11-02 21:04:33,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 21:04:33,598 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 397 transitions. [2022-11-02 21:04:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-02 21:04:33,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:33,599 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 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 21:04:33,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:33,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:34,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt [2022-11-02 21:04:34,015 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr81ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:04:34,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:34,015 INFO L85 PathProgramCache]: Analyzing trace with hash 610559287, now seen corresponding path program 1 times [2022-11-02 21:04:34,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:34,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175363273] [2022-11-02 21:04:34,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:34,016 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:34,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:34,016 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:34,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-02 21:04:34,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:34,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:04:34,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:34,618 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:04:34,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:34,816 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 21:04:34,816 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:34,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1175363273] [2022-11-02 21:04:34,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1175363273] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:04:34,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:04:34,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-11-02 21:04:34,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50549065] [2022-11-02 21:04:34,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:04:34,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:04:34,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:34,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:04:34,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:04:34,823 INFO L87 Difference]: Start difference. First operand 356 states and 397 transitions. Second operand has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-02 21:04:35,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:35,381 INFO L93 Difference]: Finished difference Result 560 states and 625 transitions. [2022-11-02 21:04:35,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:04:35,382 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 34 [2022-11-02 21:04:35,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:35,384 INFO L225 Difference]: With dead ends: 560 [2022-11-02 21:04:35,384 INFO L226 Difference]: Without dead ends: 560 [2022-11-02 21:04:35,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:04:35,385 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 294 mSDsluCounter, 1741 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 2166 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:35,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 2166 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 176 Invalid, 0 Unknown, 109 Unchecked, 0.5s Time] [2022-11-02 21:04:35,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-11-02 21:04:35,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 439. [2022-11-02 21:04:35,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 288 states have (on average 1.7083333333333333) internal successors, (492), 399 states have internal predecessors, (492), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2022-11-02 21:04:35,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 549 transitions. [2022-11-02 21:04:35,396 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 549 transitions. Word has length 34 [2022-11-02 21:04:35,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:35,396 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 549 transitions. [2022-11-02 21:04:35,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-02 21:04:35,397 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 549 transitions. [2022-11-02 21:04:35,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-02 21:04:35,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:35,397 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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 21:04:35,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:35,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:35,619 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:04:35,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:35,621 INFO L85 PathProgramCache]: Analyzing trace with hash 2092671515, now seen corresponding path program 1 times [2022-11-02 21:04:35,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:35,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212892629] [2022-11-02 21:04:35,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:35,622 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:35,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:35,623 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:35,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-02 21:04:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:35,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:04:35,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:36,082 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 21:04:36,083 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-02 21:04:36,089 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 5 treesize of output 3 [2022-11-02 21:04:36,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 5 [2022-11-02 21:04:36,441 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 21:04:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:04:36,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:36,734 INFO L356 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-11-02 21:04:36,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2022-11-02 21:04:37,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:04:37,142 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:37,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212892629] [2022-11-02 21:04:37,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212892629] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 21:04:37,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:04:37,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2022-11-02 21:04:37,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777990691] [2022-11-02 21:04:37,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:37,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:04:37,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:37,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:04:37,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-02 21:04:37,144 INFO L87 Difference]: Start difference. First operand 439 states and 549 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:04:39,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:39,907 INFO L93 Difference]: Finished difference Result 479 states and 591 transitions. [2022-11-02 21:04:39,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:04:39,908 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2022-11-02 21:04:39,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:39,910 INFO L225 Difference]: With dead ends: 479 [2022-11-02 21:04:39,910 INFO L226 Difference]: Without dead ends: 479 [2022-11-02 21:04:39,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-11-02 21:04:39,911 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 91 mSDsluCounter, 1403 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1718 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:39,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1718 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-02 21:04:39,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-11-02 21:04:39,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 441. [2022-11-02 21:04:39,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 290 states have (on average 1.706896551724138) internal successors, (495), 401 states have internal predecessors, (495), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2022-11-02 21:04:39,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 552 transitions. [2022-11-02 21:04:39,921 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 552 transitions. Word has length 34 [2022-11-02 21:04:39,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:39,921 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 552 transitions. [2022-11-02 21:04:39,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:04:39,921 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 552 transitions. [2022-11-02 21:04:39,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-02 21:04:39,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:39,922 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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 21:04:39,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-11-02 21:04:40,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:40,141 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:04:40,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:40,142 INFO L85 PathProgramCache]: Analyzing trace with hash 2092671516, now seen corresponding path program 1 times [2022-11-02 21:04:40,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:40,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312116577] [2022-11-02 21:04:40,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:40,142 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:40,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:40,143 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:40,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-02 21:04:40,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:40,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:04:40,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:40,777 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 21:04:40,778 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-02 21:04:40,784 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 5 treesize of output 3 [2022-11-02 21:04:40,828 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 21:04:40,828 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-02 21:04:40,840 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 5 treesize of output 3 [2022-11-02 21:04:41,259 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 5 [2022-11-02 21:04:41,451 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 21:04:41,464 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 21:04:41,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:04:41,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:41,815 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 21:04:41,815 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 38 treesize of output 42 [2022-11-02 21:04:42,046 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 12 treesize of output 10 [2022-11-02 21:04:43,244 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:04:43,244 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:43,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312116577] [2022-11-02 21:04:43,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312116577] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 21:04:43,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:04:43,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2022-11-02 21:04:43,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644116873] [2022-11-02 21:04:43,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:43,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:04:43,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:43,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:04:43,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-02 21:04:43,246 INFO L87 Difference]: Start difference. First operand 441 states and 552 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:04:48,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:48,000 INFO L93 Difference]: Finished difference Result 479 states and 591 transitions. [2022-11-02 21:04:48,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:04:48,002 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2022-11-02 21:04:48,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:48,004 INFO L225 Difference]: With dead ends: 479 [2022-11-02 21:04:48,004 INFO L226 Difference]: Without dead ends: 479 [2022-11-02 21:04:48,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-11-02 21:04:48,004 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 117 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1499 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:48,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 1499 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-02 21:04:48,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-11-02 21:04:48,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 441. [2022-11-02 21:04:48,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 290 states have (on average 1.703448275862069) internal successors, (494), 401 states have internal predecessors, (494), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2022-11-02 21:04:48,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 551 transitions. [2022-11-02 21:04:48,014 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 551 transitions. Word has length 34 [2022-11-02 21:04:48,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:48,014 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 551 transitions. [2022-11-02 21:04:48,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:04:48,015 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 551 transitions. [2022-11-02 21:04:48,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-02 21:04:48,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:48,016 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 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 21:04:48,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:48,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:48,231 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr82ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:04:48,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:48,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1747469131, now seen corresponding path program 1 times [2022-11-02 21:04:48,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:48,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1100869793] [2022-11-02 21:04:48,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:48,232 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:48,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:48,233 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:48,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-02 21:04:48,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:48,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:04:48,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:48,383 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 21:04:48,485 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:04:48,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:04:48,660 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:48,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1100869793] [2022-11-02 21:04:48,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1100869793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:04:48,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:04:48,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-11-02 21:04:48,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463814205] [2022-11-02 21:04:48,661 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:04:48,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:04:48,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:48,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:04:48,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:04:48,663 INFO L87 Difference]: Start difference. First operand 441 states and 551 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 21:04:49,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:49,671 INFO L93 Difference]: Finished difference Result 446 states and 557 transitions. [2022-11-02 21:04:49,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:04:49,672 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2022-11-02 21:04:49,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:49,673 INFO L225 Difference]: With dead ends: 446 [2022-11-02 21:04:49,673 INFO L226 Difference]: Without dead ends: 446 [2022-11-02 21:04:49,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:04:49,674 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 0 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:49,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1159 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 393 Invalid, 0 Unknown, 158 Unchecked, 1.0s Time] [2022-11-02 21:04:49,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-11-02 21:04:49,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 444. [2022-11-02 21:04:49,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 293 states have (on average 1.6962457337883958) internal successors, (497), 404 states have internal predecessors, (497), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2022-11-02 21:04:49,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 554 transitions. [2022-11-02 21:04:49,684 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 554 transitions. Word has length 35 [2022-11-02 21:04:49,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:49,684 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 554 transitions. [2022-11-02 21:04:49,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 21:04:49,685 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 554 transitions. [2022-11-02 21:04:49,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-02 21:04:49,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:49,686 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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 21:04:49,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:49,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:49,901 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr82ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:04:49,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:49,902 INFO L85 PathProgramCache]: Analyzing trace with hash 4658796, now seen corresponding path program 1 times [2022-11-02 21:04:49,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:49,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456778769] [2022-11-02 21:04:49,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:49,902 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:49,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:49,903 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:49,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-02 21:04:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:50,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:04:50,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 21:04:50,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:04:50,086 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:50,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456778769] [2022-11-02 21:04:50,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456778769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:50,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:50,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:04:50,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445212396] [2022-11-02 21:04:50,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:50,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:04:50,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:50,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:04:50,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:04:50,088 INFO L87 Difference]: Start difference. First operand 444 states and 554 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:04:50,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:50,187 INFO L93 Difference]: Finished difference Result 488 states and 600 transitions. [2022-11-02 21:04:50,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:04:50,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-11-02 21:04:50,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:50,191 INFO L225 Difference]: With dead ends: 488 [2022-11-02 21:04:50,191 INFO L226 Difference]: Without dead ends: 488 [2022-11-02 21:04:50,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 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 21:04:50,192 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 238 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1261 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:50,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 1261 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:04:50,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-11-02 21:04:50,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 442. [2022-11-02 21:04:50,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 291 states have (on average 1.697594501718213) internal successors, (494), 402 states have internal predecessors, (494), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2022-11-02 21:04:50,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 551 transitions. [2022-11-02 21:04:50,201 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 551 transitions. Word has length 35 [2022-11-02 21:04:50,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:50,201 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 551 transitions. [2022-11-02 21:04:50,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:04:50,202 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 551 transitions. [2022-11-02 21:04:50,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 21:04:50,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:50,203 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 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 21:04:50,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:50,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:50,418 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr84ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:04:50,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:50,418 INFO L85 PathProgramCache]: Analyzing trace with hash -14364371, now seen corresponding path program 1 times [2022-11-02 21:04:50,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:50,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [711927526] [2022-11-02 21:04:50,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:50,419 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:50,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:50,420 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:50,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-02 21:04:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:50,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:04:50,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:04:51,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 21:04:51,493 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:51,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [711927526] [2022-11-02 21:04:51,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [711927526] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:04:51,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:04:51,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-11-02 21:04:51,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770540109] [2022-11-02 21:04:51,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:04:51,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:04:51,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:51,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:04:51,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:04:51,496 INFO L87 Difference]: Start difference. First operand 442 states and 551 transitions. Second operand has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-02 21:04:51,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:51,803 INFO L93 Difference]: Finished difference Result 564 states and 629 transitions. [2022-11-02 21:04:51,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:04:51,804 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 37 [2022-11-02 21:04:51,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:51,806 INFO L225 Difference]: With dead ends: 564 [2022-11-02 21:04:51,806 INFO L226 Difference]: Without dead ends: 564 [2022-11-02 21:04:51,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:04:51,806 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 305 mSDsluCounter, 1622 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 2039 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:51,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 2039 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 107 Invalid, 0 Unknown, 130 Unchecked, 0.3s Time] [2022-11-02 21:04:51,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-11-02 21:04:51,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 444. [2022-11-02 21:04:51,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 293 states have (on average 1.6928327645051195) internal successors, (496), 404 states have internal predecessors, (496), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2022-11-02 21:04:51,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 553 transitions. [2022-11-02 21:04:51,815 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 553 transitions. Word has length 37 [2022-11-02 21:04:51,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:51,815 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 553 transitions. [2022-11-02 21:04:51,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-02 21:04:51,816 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 553 transitions. [2022-11-02 21:04:51,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 21:04:51,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:51,816 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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 21:04:51,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:52,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:52,017 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr93REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:04:52,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:52,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1327181508, now seen corresponding path program 1 times [2022-11-02 21:04:52,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:52,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016570929] [2022-11-02 21:04:52,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:52,018 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:52,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:52,020 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:52,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-02 21:04:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:52,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:04:52,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:04:52,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:04:52,221 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:52,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016570929] [2022-11-02 21:04:52,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016570929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:52,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:52,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:04:52,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409251434] [2022-11-02 21:04:52,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:52,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:04:52,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:52,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:04:52,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:04:52,223 INFO L87 Difference]: Start difference. First operand 444 states and 553 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:04:53,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:53,038 INFO L93 Difference]: Finished difference Result 462 states and 573 transitions. [2022-11-02 21:04:53,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:04:53,039 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-11-02 21:04:53,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:53,041 INFO L225 Difference]: With dead ends: 462 [2022-11-02 21:04:53,041 INFO L226 Difference]: Without dead ends: 462 [2022-11-02 21:04:53,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 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 21:04:53,042 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 42 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:53,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 738 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 21:04:53,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-02 21:04:53,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 445. [2022-11-02 21:04:53,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 295 states have (on average 1.6915254237288135) internal successors, (499), 405 states have internal predecessors, (499), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2022-11-02 21:04:53,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 556 transitions. [2022-11-02 21:04:53,052 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 556 transitions. Word has length 37 [2022-11-02 21:04:53,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:53,053 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 556 transitions. [2022-11-02 21:04:53,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:04:53,053 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 556 transitions. [2022-11-02 21:04:53,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 21:04:53,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:53,054 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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 21:04:53,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-11-02 21:04:53,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:53,260 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr94REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:04:53,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:53,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1327181509, now seen corresponding path program 1 times [2022-11-02 21:04:53,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:53,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533750614] [2022-11-02 21:04:53,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:53,260 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:53,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:53,261 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:53,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-02 21:04:53,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:53,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 21:04:53,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:53,847 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 21:04:53,847 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-02 21:04:53,859 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 5 treesize of output 3 [2022-11-02 21:04:53,909 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 21:04:53,909 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-02 21:04:53,922 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 5 treesize of output 3 [2022-11-02 21:04:54,290 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 5 [2022-11-02 21:04:54,500 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 21:04:54,510 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 21:04:54,543 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 21:04:54,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-02 21:04:54,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:04:54,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:54,896 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 12 treesize of output 10 [2022-11-02 21:04:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:04:55,388 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:55,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533750614] [2022-11-02 21:04:55,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533750614] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 21:04:55,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:04:55,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2022-11-02 21:04:55,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611862349] [2022-11-02 21:04:55,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:55,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:04:55,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:55,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:04:55,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-11-02 21:04:55,390 INFO L87 Difference]: Start difference. First operand 445 states and 556 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:04:57,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:57,505 INFO L93 Difference]: Finished difference Result 451 states and 561 transitions. [2022-11-02 21:04:57,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:04:57,506 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-11-02 21:04:57,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:57,508 INFO L225 Difference]: With dead ends: 451 [2022-11-02 21:04:57,508 INFO L226 Difference]: Without dead ends: 451 [2022-11-02 21:04:57,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2022-11-02 21:04:57,508 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 30 mSDsluCounter, 1615 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1939 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:57,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1939 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-02 21:04:57,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-11-02 21:04:57,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 447. [2022-11-02 21:04:57,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 297 states have (on average 1.6868686868686869) internal successors, (501), 407 states have internal predecessors, (501), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2022-11-02 21:04:57,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 558 transitions. [2022-11-02 21:04:57,515 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 558 transitions. Word has length 37 [2022-11-02 21:04:57,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:57,515 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 558 transitions. [2022-11-02 21:04:57,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:04:57,515 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 558 transitions. [2022-11-02 21:04:57,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-02 21:04:57,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:57,516 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 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 21:04:57,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:57,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:57,717 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr85ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:04:57,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:57,717 INFO L85 PathProgramCache]: Analyzing trace with hash -445295076, now seen corresponding path program 1 times [2022-11-02 21:04:57,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:57,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428859630] [2022-11-02 21:04:57,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:57,718 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:57,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:57,719 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:57,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-02 21:04:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:57,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:04:57,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:57,894 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 21:04:58,006 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 21:04:58,006 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 21:04:58,176 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 21:04:58,191 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:04:58,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:58,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-02 21:04:58,665 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:04:58,665 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:58,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428859630] [2022-11-02 21:04:58,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428859630] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:04:58,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:04:58,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2022-11-02 21:04:58,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118530355] [2022-11-02 21:04:58,666 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:04:58,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 21:04:58,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:58,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 21:04:58,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:04:58,667 INFO L87 Difference]: Start difference. First operand 447 states and 558 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-02 21:05:02,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:02,281 INFO L93 Difference]: Finished difference Result 454 states and 565 transitions. [2022-11-02 21:05:02,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:05:02,282 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2022-11-02 21:05:02,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:02,283 INFO L225 Difference]: With dead ends: 454 [2022-11-02 21:05:02,284 INFO L226 Difference]: Without dead ends: 454 [2022-11-02 21:05:02,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-02 21:05:02,284 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 294 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 1814 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:02,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 1814 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 858 Invalid, 0 Unknown, 129 Unchecked, 3.6s Time] [2022-11-02 21:05:02,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-11-02 21:05:02,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 448. [2022-11-02 21:05:02,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 298 states have (on average 1.6845637583892616) internal successors, (502), 408 states have internal predecessors, (502), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2022-11-02 21:05:02,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 559 transitions. [2022-11-02 21:05:02,290 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 559 transitions. Word has length 38 [2022-11-02 21:05:02,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:02,290 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 559 transitions. [2022-11-02 21:05:02,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-02 21:05:02,291 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 559 transitions. [2022-11-02 21:05:02,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-02 21:05:02,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:02,291 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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 21:05:02,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (50)] Ended with exit code 0 [2022-11-02 21:05:02,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:05:02,493 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:05:02,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:02,494 INFO L85 PathProgramCache]: Analyzing trace with hash -183877918, now seen corresponding path program 1 times [2022-11-02 21:05:02,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:05:02,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1863728391] [2022-11-02 21:05:02,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:02,494 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:05:02,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:05:02,495 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:05:02,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-02 21:05:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:02,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:05:02,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:05:05,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:07,918 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:05:07,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1863728391] [2022-11-02 21:05:07,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1863728391] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:07,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [73196258] [2022-11-02 21:05:07,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:07,919 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 21:05:07,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 21:05:07,920 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 21:05:07,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-02 21:05:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:08,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 21:05:08,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:22,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:05:22,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:26,970 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 15 treesize of output 13 [2022-11-02 21:05:29,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [73196258] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:29,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:05:29,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2022-11-02 21:05:29,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881333715] [2022-11-02 21:05:29,801 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:05:29,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 21:05:29,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:05:29,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 21:05:29,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=784, Unknown=10, NotChecked=0, Total=930 [2022-11-02 21:05:29,802 INFO L87 Difference]: Start difference. First operand 448 states and 559 transitions. Second operand has 21 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 21:05:31,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:31,397 INFO L93 Difference]: Finished difference Result 453 states and 564 transitions. [2022-11-02 21:05:31,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 21:05:31,399 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2022-11-02 21:05:31,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:31,400 INFO L225 Difference]: With dead ends: 453 [2022-11-02 21:05:31,400 INFO L226 Difference]: Without dead ends: 434 [2022-11-02 21:05:31,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=145, Invalid=901, Unknown=10, NotChecked=0, Total=1056 [2022-11-02 21:05:31,401 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 62 mSDsluCounter, 2099 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 2403 SdHoareTripleChecker+Invalid, 1631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1221 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:31,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 2403 Invalid, 1631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 396 Invalid, 0 Unknown, 1221 Unchecked, 1.5s Time] [2022-11-02 21:05:31,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-11-02 21:05:31,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 432. [2022-11-02 21:05:31,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 283 states have (on average 1.7173144876325088) internal successors, (486), 393 states have internal predecessors, (486), 24 states have call successors, (24), 16 states have call predecessors, (24), 19 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2022-11-02 21:05:31,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 542 transitions. [2022-11-02 21:05:31,410 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 542 transitions. Word has length 39 [2022-11-02 21:05:31,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:31,410 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 542 transitions. [2022-11-02 21:05:31,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 21:05:31,410 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 542 transitions. [2022-11-02 21:05:31,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 21:05:31,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:31,411 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:31,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:31,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:31,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt [2022-11-02 21:05:31,827 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr77ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:05:31,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:31,827 INFO L85 PathProgramCache]: Analyzing trace with hash -789046589, now seen corresponding path program 1 times [2022-11-02 21:05:31,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:05:31,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501122382] [2022-11-02 21:05:31,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:31,827 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:05:31,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:05:31,828 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:05:31,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-02 21:05:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:31,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:05:31,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:32,060 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 21:05:32,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:32,125 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 21:05:32,126 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:05:32,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501122382] [2022-11-02 21:05:32,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501122382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:05:32,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:05:32,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-11-02 21:05:32,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709664068] [2022-11-02 21:05:32,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:05:32,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:05:32,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:05:32,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:05:32,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:05:32,129 INFO L87 Difference]: Start difference. First operand 432 states and 542 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 21:05:32,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:32,210 INFO L93 Difference]: Finished difference Result 431 states and 541 transitions. [2022-11-02 21:05:32,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:05:32,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-11-02 21:05:32,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:32,216 INFO L225 Difference]: With dead ends: 431 [2022-11-02 21:05:32,216 INFO L226 Difference]: Without dead ends: 431 [2022-11-02 21:05:32,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 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 21:05:32,217 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 233 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:32,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 1042 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:05:32,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-11-02 21:05:32,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 431. [2022-11-02 21:05:32,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 283 states have (on average 1.7137809187279152) internal successors, (485), 392 states have internal predecessors, (485), 24 states have call successors, (24), 16 states have call predecessors, (24), 19 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2022-11-02 21:05:32,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 541 transitions. [2022-11-02 21:05:32,224 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 541 transitions. Word has length 41 [2022-11-02 21:05:32,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:32,225 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 541 transitions. [2022-11-02 21:05:32,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 21:05:32,225 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 541 transitions. [2022-11-02 21:05:32,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 21:05:32,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:32,226 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 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 21:05:32,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:32,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:05:32,428 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:05:32,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:32,428 INFO L85 PathProgramCache]: Analyzing trace with hash -817675940, now seen corresponding path program 1 times [2022-11-02 21:05:32,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:05:32,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34943197] [2022-11-02 21:05:32,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:32,429 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:05:32,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:05:32,430 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:05:32,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-02 21:05:32,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:32,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 21:05:32,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:32,709 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-02 21:05:32,710 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 21:05:32,730 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:05:32,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:05:32,730 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:05:32,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34943197] [2022-11-02 21:05:32,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34943197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:32,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:05:32,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:05:32,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374629060] [2022-11-02 21:05:32,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:32,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:05:32,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:05:32,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:05:32,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:05:32,732 INFO L87 Difference]: Start difference. First operand 431 states and 541 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 21:05:34,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:34,033 INFO L93 Difference]: Finished difference Result 485 states and 556 transitions. [2022-11-02 21:05:34,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:05:34,034 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-11-02 21:05:34,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:34,037 INFO L225 Difference]: With dead ends: 485 [2022-11-02 21:05:34,037 INFO L226 Difference]: Without dead ends: 485 [2022-11-02 21:05:34,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:05:34,038 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 161 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:34,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 867 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 353 Invalid, 0 Unknown, 233 Unchecked, 1.3s Time] [2022-11-02 21:05:34,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-11-02 21:05:34,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 430. [2022-11-02 21:05:34,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 283 states have (on average 1.7102473498233215) internal successors, (484), 391 states have internal predecessors, (484), 24 states have call successors, (24), 16 states have call predecessors, (24), 19 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2022-11-02 21:05:34,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 540 transitions. [2022-11-02 21:05:34,047 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 540 transitions. Word has length 41 [2022-11-02 21:05:34,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:34,047 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 540 transitions. [2022-11-02 21:05:34,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 21:05:34,048 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 540 transitions. [2022-11-02 21:05:34,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 21:05:34,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:34,049 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 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 21:05:34,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-11-02 21:05:34,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:05:34,263 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-02 21:05:34,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:34,263 INFO L85 PathProgramCache]: Analyzing trace with hash -817675939, now seen corresponding path program 1 times [2022-11-02 21:05:34,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:05:34,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524175411] [2022-11-02 21:05:34,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:34,264 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:05:34,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:05:34,265 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:05:34,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-02 21:05:34,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:34,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 21:05:34,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:34,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:05:34,790 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 21:05:34,811 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 21:05:34,811 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 21:05:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 21:05:34,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:37,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:05:37,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524175411] [2022-11-02 21:05:37,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524175411] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:37,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [899348788] [2022-11-02 21:05:37,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:37,438 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 21:05:37,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 21:05:37,442 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 21:05:37,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89010900-7f27-40e4-ac88-904b468a2292/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-02 21:05:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:37,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-02 21:05:37,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:37,864 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 21:05:37,874 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 21:05:38,245 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 21:05:38,245 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 21:05:38,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 21:05:40,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:05:40,528 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 12 treesize of output 14 [2022-11-02 21:05:40,556 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 21:05:40,556 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 21:05:45,352 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 21:05:45,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-02 21:05:45,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:05:45,852 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-02 21:05:45,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 26 [2022-11-02 21:05:45,872 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-02 21:05:45,872 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 21:05:45,902 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:05:45,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:46,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [899348788] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:46,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:05:46,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15] total 20 [2022-11-02 21:05:46,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125177859] [2022-11-02 21:05:46,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:05:46,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 21:05:46,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:05:46,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 21:05:46,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=427, Unknown=2, NotChecked=0, Total=506 [2022-11-02 21:05:46,274 INFO L87 Difference]: Start difference. First operand 430 states and 540 transitions. Second operand has 21 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 6 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10)