./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/stroeder1-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/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_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/stroeder1-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/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_cbef3a67-537e-4c61-b170-80ed4d582313/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 7ecc590057ed2a75208183cfd6234616268fa2b1af2dc90ae740756ef7d3d489 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:39:10,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:39:10,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:39:10,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:39:10,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:39:10,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:39:10,686 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:39:10,688 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:39:10,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:39:10,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:39:10,692 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:39:10,693 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:39:10,693 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:39:10,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:39:10,696 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:39:10,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:39:10,698 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:39:10,699 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:39:10,703 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:39:10,705 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:39:10,711 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:39:10,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:39:10,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:39:10,719 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:39:10,724 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:39:10,730 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:39:10,730 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:39:10,731 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:39:10,732 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:39:10,733 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:39:10,733 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:39:10,734 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:39:10,736 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:39:10,738 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:39:10,740 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:39:10,740 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:39:10,741 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:39:10,742 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:39:10,742 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:39:10,743 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:39:10,744 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:39:10,744 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-02 20:39:10,776 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:39:10,776 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:39:10,777 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:39:10,777 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:39:10,778 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:39:10,779 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:39:10,780 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:39:10,780 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:39:10,780 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:39:10,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:39:10,782 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:39:10,782 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-02 20:39:10,782 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:39:10,782 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:39:10,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:39:10,783 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-02 20:39:10,783 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-02 20:39:10,783 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-02 20:39:10,783 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:39:10,783 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 20:39:10,783 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:39:10,784 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:39:10,784 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:39:10,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:39:10,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:39:10,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:39:10,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:39:10,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:39:10,785 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:39:10,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:39:10,785 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_cbef3a67-537e-4c61-b170-80ed4d582313/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ecc590057ed2a75208183cfd6234616268fa2b1af2dc90ae740756ef7d3d489 [2022-11-02 20:39:11,050 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:39:11,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:39:11,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:39:11,094 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:39:11,095 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:39:11,096 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/array-memsafety/stroeder1-alloca-1.i [2022-11-02 20:39:11,166 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/data/bc610516a/2a9a568fbb2f4300a17949ce062f581a/FLAGab74f594d [2022-11-02 20:39:11,743 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:39:11,744 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/sv-benchmarks/c/array-memsafety/stroeder1-alloca-1.i [2022-11-02 20:39:11,753 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/data/bc610516a/2a9a568fbb2f4300a17949ce062f581a/FLAGab74f594d [2022-11-02 20:39:12,033 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/data/bc610516a/2a9a568fbb2f4300a17949ce062f581a [2022-11-02 20:39:12,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:39:12,037 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:39:12,038 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:39:12,039 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:39:12,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:39:12,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:39:12" (1/1) ... [2022-11-02 20:39:12,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d4fed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:12, skipping insertion in model container [2022-11-02 20:39:12,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:39:12" (1/1) ... [2022-11-02 20:39:12,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:39:12,116 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:39:12,388 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:39:12,396 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-02 20:39:12,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3e943e26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:12, skipping insertion in model container [2022-11-02 20:39:12,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:39:12,397 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-02 20:39:12,399 INFO L158 Benchmark]: Toolchain (without parser) took 361.42ms. Allocated memory is still 117.4MB. Free memory was 80.1MB in the beginning and 92.2MB in the end (delta: -12.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-02 20:39:12,399 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 117.4MB. Free memory is still 98.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:39:12,400 INFO L158 Benchmark]: CACSL2BoogieTranslator took 358.68ms. Allocated memory is still 117.4MB. Free memory was 79.9MB in the beginning and 92.2MB in the end (delta: -12.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-02 20:39:12,401 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 117.4MB. Free memory is still 98.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 358.68ms. Allocated memory is still 117.4MB. Free memory was 79.9MB in the beginning and 92.2MB in the end (delta: -12.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 529]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/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_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/stroeder1-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/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_cbef3a67-537e-4c61-b170-80ed4d582313/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 7ecc590057ed2a75208183cfd6234616268fa2b1af2dc90ae740756ef7d3d489 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:39:14,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:39:14,451 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:39:14,491 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:39:14,492 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:39:14,493 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:39:14,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:39:14,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:39:14,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:39:14,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:39:14,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:39:14,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:39:14,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:39:14,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:39:14,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:39:14,507 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:39:14,508 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:39:14,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:39:14,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:39:14,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:39:14,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:39:14,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:39:14,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:39:14,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:39:14,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:39:14,523 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:39:14,523 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:39:14,524 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:39:14,525 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:39:14,526 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:39:14,526 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:39:14,527 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:39:14,528 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:39:14,529 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:39:14,531 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:39:14,531 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:39:14,532 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:39:14,532 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:39:14,533 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:39:14,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:39:14,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:39:14,535 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-02 20:39:14,559 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:39:14,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:39:14,560 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:39:14,560 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:39:14,561 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:39:14,561 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:39:14,562 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:39:14,562 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:39:14,562 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:39:14,563 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:39:14,563 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:39:14,563 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-02 20:39:14,563 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:39:14,563 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:39:14,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:39:14,564 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-02 20:39:14,564 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-02 20:39:14,564 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-02 20:39:14,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:39:14,565 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 20:39:14,565 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-02 20:39:14,565 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-02 20:39:14,566 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:39:14,566 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:39:14,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:39:14,566 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:39:14,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:39:14,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:39:14,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:39:14,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:39:14,567 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-02 20:39:14,568 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-02 20:39:14,568 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-02 20:39:14,568 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_cbef3a67-537e-4c61-b170-80ed4d582313/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ecc590057ed2a75208183cfd6234616268fa2b1af2dc90ae740756ef7d3d489 [2022-11-02 20:39:14,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:39:14,991 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:39:14,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:39:14,995 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:39:14,996 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:39:15,002 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/array-memsafety/stroeder1-alloca-1.i [2022-11-02 20:39:15,071 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/data/8886e398a/6df5c481ee5a46e193129f0aface2c97/FLAG7e781b463 [2022-11-02 20:39:15,710 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:39:15,710 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/sv-benchmarks/c/array-memsafety/stroeder1-alloca-1.i [2022-11-02 20:39:15,740 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/data/8886e398a/6df5c481ee5a46e193129f0aface2c97/FLAG7e781b463 [2022-11-02 20:39:15,988 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/data/8886e398a/6df5c481ee5a46e193129f0aface2c97 [2022-11-02 20:39:15,992 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:39:15,997 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:39:16,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:39:16,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:39:16,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:39:16,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:39:15" (1/1) ... [2022-11-02 20:39:16,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1740d251 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:16, skipping insertion in model container [2022-11-02 20:39:16,013 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:39:15" (1/1) ... [2022-11-02 20:39:16,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:39:16,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:39:16,501 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:39:16,515 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-02 20:39:16,525 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:39:16,566 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:39:16,577 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:39:16,621 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:39:16,668 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:39:16,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:16 WrapperNode [2022-11-02 20:39:16,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:39:16,670 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:39:16,670 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:39:16,670 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:39:16,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:16" (1/1) ... [2022-11-02 20:39:16,705 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:16" (1/1) ... [2022-11-02 20:39:16,731 INFO L138 Inliner]: procedures = 119, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 51 [2022-11-02 20:39:16,732 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:39:16,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:39:16,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:39:16,733 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:39:16,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:16" (1/1) ... [2022-11-02 20:39:16,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:16" (1/1) ... [2022-11-02 20:39:16,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:16" (1/1) ... [2022-11-02 20:39:16,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:16" (1/1) ... [2022-11-02 20:39:16,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:16" (1/1) ... [2022-11-02 20:39:16,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:16" (1/1) ... [2022-11-02 20:39:16,778 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:16" (1/1) ... [2022-11-02 20:39:16,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:16" (1/1) ... [2022-11-02 20:39:16,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:39:16,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:39:16,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:39:16,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:39:16,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:16" (1/1) ... [2022-11-02 20:39:16,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:39:16,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:16,824 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:39:16,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:39:16,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-02 20:39:16,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:39:16,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:39:16,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-02 20:39:16,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:39:16,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:39:17,004 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:39:17,006 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:39:17,177 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:39:17,182 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:39:17,183 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 20:39:17,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:39:17 BoogieIcfgContainer [2022-11-02 20:39:17,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:39:17,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:39:17,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:39:17,190 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:39:17,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:39:15" (1/3) ... [2022-11-02 20:39:17,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@333b096f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:39:17, skipping insertion in model container [2022-11-02 20:39:17,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:16" (2/3) ... [2022-11-02 20:39:17,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@333b096f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:39:17, skipping insertion in model container [2022-11-02 20:39:17,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:39:17" (3/3) ... [2022-11-02 20:39:17,193 INFO L112 eAbstractionObserver]: Analyzing ICFG stroeder1-alloca-1.i [2022-11-02 20:39:17,211 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:39:17,212 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2022-11-02 20:39:17,282 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:39:17,293 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;@149e9883, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:39:17,293 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-02 20:39:17,298 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:17,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-02 20:39:17,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:17,305 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-02 20:39:17,305 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-02 20:39:17,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:17,311 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2022-11-02 20:39:17,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:39:17,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [943700819] [2022-11-02 20:39:17,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:17,323 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:39:17,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:39:17,327 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:39:17,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-02 20:39:17,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:17,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:39:17,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:17,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-02 20:39:17,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:17,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:39:17,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:39:17,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [943700819] [2022-11-02 20:39:17,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [943700819] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:17,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:17,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:39:17,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372235915] [2022-11-02 20:39:17,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:17,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:39:17,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:39:17,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:39:17,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:39:17,677 INFO L87 Difference]: Start difference. First operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:17,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:17,740 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-11-02 20:39:17,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:39:17,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-02 20:39:17,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:17,750 INFO L225 Difference]: With dead ends: 22 [2022-11-02 20:39:17,750 INFO L226 Difference]: Without dead ends: 20 [2022-11-02 20:39:17,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:39:17,755 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:17,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 21 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:39:17,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-02 20:39:17,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-02 20:39:17,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:17,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-11-02 20:39:17,786 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 6 [2022-11-02 20:39:17,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:17,787 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-11-02 20:39:17,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:17,788 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-11-02 20:39:17,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-02 20:39:17,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:17,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-02 20:39:17,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-02 20:39:18,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:39:18,001 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-02 20:39:18,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:18,001 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2022-11-02 20:39:18,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:39:18,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1015811485] [2022-11-02 20:39:18,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:18,004 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:39:18,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:39:18,005 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:39:18,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-02 20:39:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:18,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:39:18,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:18,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:39:18,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:18,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:39:18,184 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:39:18,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1015811485] [2022-11-02 20:39:18,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1015811485] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:18,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:18,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:39:18,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942449705] [2022-11-02 20:39:18,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:18,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:39:18,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:39:18,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:39:18,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:39:18,188 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:18,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:18,336 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2022-11-02 20:39:18,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:39:18,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-02 20:39:18,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:18,338 INFO L225 Difference]: With dead ends: 41 [2022-11-02 20:39:18,338 INFO L226 Difference]: Without dead ends: 41 [2022-11-02 20:39:18,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:39:18,340 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 23 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:18,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 65 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:39:18,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-02 20:39:18,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 23. [2022-11-02 20:39:18,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:18,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-11-02 20:39:18,346 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 6 [2022-11-02 20:39:18,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:18,346 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-11-02 20:39:18,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:18,346 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-11-02 20:39:18,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-02 20:39:18,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:18,347 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-02 20:39:18,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-11-02 20:39:18,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:39:18,559 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-02 20:39:18,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:18,560 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2022-11-02 20:39:18,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:39:18,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996625240] [2022-11-02 20:39:18,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:18,561 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:39:18,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:39:18,564 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:39:18,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-02 20:39:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:18,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:39:18,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:18,718 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 8 treesize of output 7 [2022-11-02 20:39:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:18,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:39:18,788 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:39:18,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996625240] [2022-11-02 20:39:18,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996625240] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:18,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:18,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:39:18,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321742049] [2022-11-02 20:39:18,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:18,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:39:18,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:39:18,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:39:18,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:39:18,792 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:18,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:18,831 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-11-02 20:39:18,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:39:18,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-02 20:39:18,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:18,833 INFO L225 Difference]: With dead ends: 25 [2022-11-02 20:39:18,833 INFO L226 Difference]: Without dead ends: 25 [2022-11-02 20:39:18,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:39:18,835 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:18,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 44 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 9 Unchecked, 0.0s Time] [2022-11-02 20:39:18,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-02 20:39:18,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-11-02 20:39:18,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.35) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:18,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-11-02 20:39:18,846 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 6 [2022-11-02 20:39:18,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:18,847 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-11-02 20:39:18,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:18,848 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-11-02 20:39:18,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-02 20:39:18,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:18,850 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:18,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:19,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:39:19,060 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-02 20:39:19,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:19,061 INFO L85 PathProgramCache]: Analyzing trace with hash 176742579, now seen corresponding path program 1 times [2022-11-02 20:39:19,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:39:19,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1774855198] [2022-11-02 20:39:19,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:19,062 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:39:19,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:39:19,063 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:39:19,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-02 20:39:19,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:19,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:39:19,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:19,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-02 20:39:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:19,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:39:19,199 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:39:19,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1774855198] [2022-11-02 20:39:19,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1774855198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:19,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:19,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:39:19,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396772169] [2022-11-02 20:39:19,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:19,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:39:19,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:39:19,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:39:19,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:39:19,205 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:19,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:19,322 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-11-02 20:39:19,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:39:19,323 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-02 20:39:19,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:19,324 INFO L225 Difference]: With dead ends: 26 [2022-11-02 20:39:19,324 INFO L226 Difference]: Without dead ends: 26 [2022-11-02 20:39:19,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:39:19,325 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:19,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 32 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:39:19,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-02 20:39:19,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2022-11-02 20:39:19,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:19,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-11-02 20:39:19,328 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 8 [2022-11-02 20:39:19,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:19,329 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-11-02 20:39:19,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:19,329 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-11-02 20:39:19,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-02 20:39:19,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:19,330 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:19,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:19,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:39:19,542 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-02 20:39:19,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:19,543 INFO L85 PathProgramCache]: Analyzing trace with hash 176742580, now seen corresponding path program 1 times [2022-11-02 20:39:19,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:39:19,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959547256] [2022-11-02 20:39:19,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:19,544 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:39:19,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:39:19,545 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:39:19,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-02 20:39:19,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:19,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:39:19,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:19,660 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 8 treesize of output 7 [2022-11-02 20:39:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:19,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:39:19,877 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:39:19,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959547256] [2022-11-02 20:39:19,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959547256] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:19,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:19,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:39:19,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093653210] [2022-11-02 20:39:19,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:19,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:39:19,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:39:19,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:39:19,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:39:19,881 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:19,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:19,929 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-11-02 20:39:19,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:39:19,930 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-02 20:39:19,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:19,931 INFO L225 Difference]: With dead ends: 26 [2022-11-02 20:39:19,932 INFO L226 Difference]: Without dead ends: 26 [2022-11-02 20:39:19,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:39:19,933 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:19,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 56 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-11-02 20:39:19,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-02 20:39:19,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-02 20:39:19,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:19,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-02 20:39:19,944 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 8 [2022-11-02 20:39:19,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:19,945 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-02 20:39:19,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:19,946 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-02 20:39:19,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-02 20:39:19,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:19,947 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:19,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:20,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:39:20,159 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-02 20:39:20,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:20,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2022-11-02 20:39:20,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:39:20,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [195403874] [2022-11-02 20:39:20,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:20,161 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:39:20,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:39:20,162 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:39:20,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-02 20:39:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:20,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:39:20,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:20,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:20,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:20,318 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:39:20,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [195403874] [2022-11-02 20:39:20,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [195403874] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:39:20,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:39:20,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-02 20:39:20,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265264325] [2022-11-02 20:39:20,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:20,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:39:20,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:39:20,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:39:20,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:39:20,321 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:20,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:20,392 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-11-02 20:39:20,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:39:20,394 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-02 20:39:20,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:20,394 INFO L225 Difference]: With dead ends: 40 [2022-11-02 20:39:20,394 INFO L226 Difference]: Without dead ends: 40 [2022-11-02 20:39:20,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:39:20,396 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 62 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:20,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 61 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:39:20,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-02 20:39:20,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2022-11-02 20:39:20,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:20,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-11-02 20:39:20,400 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 10 [2022-11-02 20:39:20,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:20,400 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-11-02 20:39:20,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:20,401 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-11-02 20:39:20,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-02 20:39:20,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:20,401 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:20,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:20,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:39:20,618 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-02 20:39:20,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:20,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2022-11-02 20:39:20,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:39:20,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [14059498] [2022-11-02 20:39:20,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:20,619 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:39:20,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:39:20,620 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:39:20,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-02 20:39:20,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:20,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:39:20,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:20,699 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 8 treesize of output 7 [2022-11-02 20:39:20,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:20,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:21,502 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:39:21,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [14059498] [2022-11-02 20:39:21,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [14059498] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:39:21,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:39:21,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-02 20:39:21,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109218724] [2022-11-02 20:39:21,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:21,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:39:21,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:39:21,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:39:21,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:39:21,504 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:21,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:21,856 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2022-11-02 20:39:21,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:39:21,859 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-02 20:39:21,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:21,860 INFO L225 Difference]: With dead ends: 45 [2022-11-02 20:39:21,860 INFO L226 Difference]: Without dead ends: 45 [2022-11-02 20:39:21,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:39:21,861 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 66 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:21,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 59 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 55 Invalid, 0 Unknown, 6 Unchecked, 0.3s Time] [2022-11-02 20:39:21,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-02 20:39:21,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2022-11-02 20:39:21,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:21,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-11-02 20:39:21,865 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 10 [2022-11-02 20:39:21,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:21,865 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-11-02 20:39:21,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:21,865 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-11-02 20:39:21,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-02 20:39:21,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:21,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:21,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:22,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:39:22,071 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-02 20:39:22,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:22,072 INFO L85 PathProgramCache]: Analyzing trace with hash -680998151, now seen corresponding path program 1 times [2022-11-02 20:39:22,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:39:22,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522280697] [2022-11-02 20:39:22,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:22,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:39:22,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:39:22,073 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:39:22,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-02 20:39:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:22,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:39:22,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:22,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:39:22,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:39:22,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:39:22,251 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:39:22,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522280697] [2022-11-02 20:39:22,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1522280697] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:22,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:22,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:39:22,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441500277] [2022-11-02 20:39:22,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:22,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:39:22,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:39:22,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:39:22,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:39:22,253 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:22,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:22,441 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-11-02 20:39:22,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:39:22,442 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-02 20:39:22,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:22,443 INFO L225 Difference]: With dead ends: 58 [2022-11-02 20:39:22,443 INFO L226 Difference]: Without dead ends: 58 [2022-11-02 20:39:22,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:39:22,444 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:22,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 72 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:39:22,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-02 20:39:22,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 38. [2022-11-02 20:39:22,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:22,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-11-02 20:39:22,448 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 12 [2022-11-02 20:39:22,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:22,448 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-11-02 20:39:22,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:22,448 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-11-02 20:39:22,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-02 20:39:22,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:22,449 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:22,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:22,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:39:22,659 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-02 20:39:22,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:22,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1074025161, now seen corresponding path program 1 times [2022-11-02 20:39:22,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:39:22,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1407859079] [2022-11-02 20:39:22,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:22,659 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:39:22,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:39:22,661 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:39:22,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-02 20:39:22,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:22,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:39:22,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:22,748 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 8 treesize of output 7 [2022-11-02 20:39:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:23,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:23,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:23,885 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:39:23,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1407859079] [2022-11-02 20:39:23,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1407859079] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:39:23,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:39:23,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-11-02 20:39:23,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708492653] [2022-11-02 20:39:23,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:23,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:39:23,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:39:23,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:39:23,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:39:23,888 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:24,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:24,674 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-11-02 20:39:24,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:39:24,676 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-02 20:39:24,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:24,678 INFO L225 Difference]: With dead ends: 46 [2022-11-02 20:39:24,678 INFO L226 Difference]: Without dead ends: 46 [2022-11-02 20:39:24,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:39:24,680 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:24,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 47 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:39:24,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-02 20:39:24,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2022-11-02 20:39:24,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:24,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-11-02 20:39:24,685 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 12 [2022-11-02 20:39:24,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:24,686 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-11-02 20:39:24,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:24,686 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-11-02 20:39:24,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 20:39:24,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:24,687 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:24,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-11-02 20:39:24,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:39:24,901 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-02 20:39:24,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:24,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1604245468, now seen corresponding path program 1 times [2022-11-02 20:39:24,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:39:24,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2069477451] [2022-11-02 20:39:24,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:24,903 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:39:24,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:39:24,903 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:39:24,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-02 20:39:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:24,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:39:24,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:39:24,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:39:24,998 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:39:24,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2069477451] [2022-11-02 20:39:24,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2069477451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:24,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:24,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:39:24,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693469565] [2022-11-02 20:39:24,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:24,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:39:25,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:39:25,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:39:25,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:39:25,001 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:25,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:25,057 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2022-11-02 20:39:25,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:39:25,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-02 20:39:25,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:25,059 INFO L225 Difference]: With dead ends: 51 [2022-11-02 20:39:25,059 INFO L226 Difference]: Without dead ends: 51 [2022-11-02 20:39:25,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:39:25,060 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 16 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:25,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 52 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:39:25,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-02 20:39:25,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2022-11-02 20:39:25,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:25,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-11-02 20:39:25,064 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 14 [2022-11-02 20:39:25,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:25,064 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-11-02 20:39:25,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:25,064 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-11-02 20:39:25,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 20:39:25,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:25,065 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:25,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:25,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:39:25,275 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-02 20:39:25,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:25,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1346080030, now seen corresponding path program 1 times [2022-11-02 20:39:25,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:39:25,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096980569] [2022-11-02 20:39:25,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:25,277 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:39:25,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:39:25,278 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:39:25,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-02 20:39:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:25,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:39:25,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:25,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:25,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:25,648 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:39:25,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096980569] [2022-11-02 20:39:25,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096980569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:39:25,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:39:25,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2022-11-02 20:39:25,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773207027] [2022-11-02 20:39:25,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:25,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:39:25,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:39:25,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:39:25,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:39:25,655 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:25,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:25,985 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2022-11-02 20:39:25,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:39:25,986 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-02 20:39:25,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:25,987 INFO L225 Difference]: With dead ends: 53 [2022-11-02 20:39:25,987 INFO L226 Difference]: Without dead ends: 53 [2022-11-02 20:39:25,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:39:25,988 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 84 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:25,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 66 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:39:25,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-02 20:39:25,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 37. [2022-11-02 20:39:25,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:25,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-11-02 20:39:25,992 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 14 [2022-11-02 20:39:25,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:25,992 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-11-02 20:39:25,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:25,993 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-11-02 20:39:25,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-02 20:39:25,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:25,994 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:26,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:26,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:39:26,206 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-02 20:39:26,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:26,207 INFO L85 PathProgramCache]: Analyzing trace with hash 262066236, now seen corresponding path program 1 times [2022-11-02 20:39:26,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:39:26,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [643680797] [2022-11-02 20:39:26,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:26,207 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:39:26,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:39:26,208 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:39:26,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-02 20:39:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:26,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:39:26,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:26,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:39:26,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:26,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:39:26,420 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:39:26,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [643680797] [2022-11-02 20:39:26,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [643680797] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:39:26,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:39:26,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-02 20:39:26,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582249304] [2022-11-02 20:39:26,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:26,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:39:26,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:39:26,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:39:26,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:39:26,422 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:26,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:26,508 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2022-11-02 20:39:26,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:39:26,509 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-02 20:39:26,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:26,509 INFO L225 Difference]: With dead ends: 47 [2022-11-02 20:39:26,509 INFO L226 Difference]: Without dead ends: 47 [2022-11-02 20:39:26,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:39:26,510 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:26,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:39:26,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-02 20:39:26,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2022-11-02 20:39:26,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 40 states have (on average 1.175) internal successors, (47), 42 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:26,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-11-02 20:39:26,514 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 16 [2022-11-02 20:39:26,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:26,515 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-11-02 20:39:26,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:26,516 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-11-02 20:39:26,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-02 20:39:26,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:26,517 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:26,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:26,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:39:26,727 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-02 20:39:26,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:26,728 INFO L85 PathProgramCache]: Analyzing trace with hash -749051014, now seen corresponding path program 1 times [2022-11-02 20:39:26,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:39:26,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [792054113] [2022-11-02 20:39:26,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:26,728 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:39:26,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:39:26,730 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:39:26,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-02 20:39:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:26,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 20:39:26,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:26,848 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 8 treesize of output 7 [2022-11-02 20:39:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:39:27,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:28,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:39:28,146 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:39:28,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [792054113] [2022-11-02 20:39:28,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [792054113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:39:28,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:39:28,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-02 20:39:28,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432732898] [2022-11-02 20:39:28,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:28,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:39:28,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:39:28,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:39:28,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:39:28,149 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:29,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:29,109 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2022-11-02 20:39:29,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:39:29,112 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-02 20:39:29,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:29,112 INFO L225 Difference]: With dead ends: 55 [2022-11-02 20:39:29,112 INFO L226 Difference]: Without dead ends: 55 [2022-11-02 20:39:29,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:39:29,113 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:29,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 57 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 56 Invalid, 0 Unknown, 6 Unchecked, 0.3s Time] [2022-11-02 20:39:29,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-02 20:39:29,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2022-11-02 20:39:29,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.1875) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:29,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-11-02 20:39:29,128 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 16 [2022-11-02 20:39:29,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:29,129 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-11-02 20:39:29,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:29,129 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-11-02 20:39:29,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:39:29,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:29,130 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 20:39:29,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:29,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:39:29,331 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-02 20:39:29,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:29,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1557469017, now seen corresponding path program 1 times [2022-11-02 20:39:29,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:39:29,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1073105410] [2022-11-02 20:39:29,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:29,332 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:39:29,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:39:29,333 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:39:29,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-02 20:39:29,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:29,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:39:29,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:29,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:39:29,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:39:29,589 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:39:29,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1073105410] [2022-11-02 20:39:29,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1073105410] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:29,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:29,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:39:29,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182127503] [2022-11-02 20:39:29,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:29,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:39:29,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:39:29,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:39:29,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:39:29,591 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:29,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:29,599 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2022-11-02 20:39:29,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:39:29,601 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-02 20:39:29,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:29,601 INFO L225 Difference]: With dead ends: 50 [2022-11-02 20:39:29,601 INFO L226 Difference]: Without dead ends: 35 [2022-11-02 20:39:29,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:39:29,602 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:29,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 32 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 6 Unchecked, 0.0s Time] [2022-11-02 20:39:29,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-02 20:39:29,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-02 20:39:29,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:29,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-11-02 20:39:29,607 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 18 [2022-11-02 20:39:29,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:29,607 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-11-02 20:39:29,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:29,607 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-11-02 20:39:29,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:39:29,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:29,608 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2022-11-02 20:39:29,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:29,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:39:29,819 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-02 20:39:29,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:29,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2022-11-02 20:39:29,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:39:29,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1252353614] [2022-11-02 20:39:29,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:39:29,820 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:39:29,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:39:29,821 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:39:29,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-02 20:39:29,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:39:29,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:39:29,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 20:39:29,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:29,937 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 8 treesize of output 7 [2022-11-02 20:39:30,411 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:30,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:31,602 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:39:31,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1252353614] [2022-11-02 20:39:31,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1252353614] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:39:31,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:39:31,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-02 20:39:31,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771083053] [2022-11-02 20:39:31,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:31,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:39:31,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:39:31,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:39:31,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:39:31,605 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:33,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:33,441 INFO L93 Difference]: Finished difference Result 131 states and 138 transitions. [2022-11-02 20:39:33,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:39:33,443 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-02 20:39:33,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:33,443 INFO L225 Difference]: With dead ends: 131 [2022-11-02 20:39:33,443 INFO L226 Difference]: Without dead ends: 131 [2022-11-02 20:39:33,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2022-11-02 20:39:33,444 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 171 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:33,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 99 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 153 Invalid, 0 Unknown, 33 Unchecked, 0.6s Time] [2022-11-02 20:39:33,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-02 20:39:33,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 51. [2022-11-02 20:39:33,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 49 states have (on average 1.183673469387755) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:33,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2022-11-02 20:39:33,449 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 18 [2022-11-02 20:39:33,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:33,449 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2022-11-02 20:39:33,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:33,450 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2022-11-02 20:39:33,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-02 20:39:33,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:33,451 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:33,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:33,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:39:33,662 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-02 20:39:33,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:33,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1515193216, now seen corresponding path program 2 times [2022-11-02 20:39:33,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:39:33,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745066766] [2022-11-02 20:39:33,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:39:33,663 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:39:33,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:39:33,664 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:39:33,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-02 20:39:33,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:39:33,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:39:33,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-02 20:39:33,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:33,775 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 8 treesize of output 7 [2022-11-02 20:39:34,292 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:34,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:37,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:39:37,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745066766] [2022-11-02 20:39:37,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745066766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:39:37,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:39:37,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2022-11-02 20:39:37,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035111530] [2022-11-02 20:39:37,046 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:37,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 20:39:37,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:39:37,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 20:39:37,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:39:37,047 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:38,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:38,329 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2022-11-02 20:39:38,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:39:38,332 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-02 20:39:38,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:38,333 INFO L225 Difference]: With dead ends: 73 [2022-11-02 20:39:38,333 INFO L226 Difference]: Without dead ends: 66 [2022-11-02 20:39:38,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-11-02 20:39:38,334 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 25 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:38,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 92 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 112 Invalid, 0 Unknown, 21 Unchecked, 0.7s Time] [2022-11-02 20:39:38,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-02 20:39:38,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2022-11-02 20:39:38,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 55 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:38,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2022-11-02 20:39:38,339 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 24 [2022-11-02 20:39:38,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:38,340 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2022-11-02 20:39:38,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:38,340 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2022-11-02 20:39:38,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-02 20:39:38,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:38,341 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:38,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-11-02 20:39:38,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:39:38,557 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-02 20:39:38,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:38,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1844565766, now seen corresponding path program 3 times [2022-11-02 20:39:38,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:39:38,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1106781736] [2022-11-02 20:39:38,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:39:38,558 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:39:38,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:39:38,559 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:39:38,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-02 20:39:38,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-02 20:39:38,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:39:38,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 20:39:38,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:38,725 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 8 treesize of output 7 [2022-11-02 20:39:39,389 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 20:39:39,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 20:39:42,237 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:39:42,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1106781736] [2022-11-02 20:39:42,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1106781736] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:39:42,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:39:42,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-11-02 20:39:42,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730616639] [2022-11-02 20:39:42,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:42,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:39:42,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:39:42,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:39:42,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:39:42,241 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:46,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:46,514 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2022-11-02 20:39:46,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:39:46,516 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-02 20:39:46,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:46,516 INFO L225 Difference]: With dead ends: 84 [2022-11-02 20:39:46,517 INFO L226 Difference]: Without dead ends: 84 [2022-11-02 20:39:46,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=278, Invalid=778, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 20:39:46,518 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 74 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:46,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 69 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 130 Invalid, 0 Unknown, 18 Unchecked, 0.9s Time] [2022-11-02 20:39:46,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-02 20:39:46,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 67. [2022-11-02 20:39:46,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 65 states have (on average 1.123076923076923) internal successors, (73), 66 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:46,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2022-11-02 20:39:46,522 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 32 [2022-11-02 20:39:46,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:46,523 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2022-11-02 20:39:46,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:46,523 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2022-11-02 20:39:46,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-02 20:39:46,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:46,524 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2022-11-02 20:39:46,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:46,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:39:46,735 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-02 20:39:46,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:46,736 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2022-11-02 20:39:46,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:39:46,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1367521521] [2022-11-02 20:39:46,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:39:46,736 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:39:46,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:39:46,737 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:39:46,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-02 20:39:46,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-02 20:39:46,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:39:46,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 20:39:46,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:46,947 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 8 treesize of output 7 [2022-11-02 20:39:47,754 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:47,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:51,742 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:51,742 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:39:51,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1367521521] [2022-11-02 20:39:51,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1367521521] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:39:51,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:39:51,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-11-02 20:39:51,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795795419] [2022-11-02 20:39:51,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:51,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-02 20:39:51,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:39:51,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-02 20:39:51,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:39:51,745 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:14,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:14,588 INFO L93 Difference]: Finished difference Result 483 states and 497 transitions. [2022-11-02 20:40:14,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-02 20:40:14,589 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-02 20:40:14,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:14,591 INFO L225 Difference]: With dead ends: 483 [2022-11-02 20:40:14,591 INFO L226 Difference]: Without dead ends: 483 [2022-11-02 20:40:14,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=547, Invalid=1259, Unknown=0, NotChecked=0, Total=1806 [2022-11-02 20:40:14,593 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 434 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:14,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 314 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 567 Invalid, 0 Unknown, 22 Unchecked, 4.1s Time] [2022-11-02 20:40:14,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-11-02 20:40:14,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 99. [2022-11-02 20:40:14,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 98 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:14,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 113 transitions. [2022-11-02 20:40:14,599 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 113 transitions. Word has length 34 [2022-11-02 20:40:14,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:14,600 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 113 transitions. [2022-11-02 20:40:14,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:14,600 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 113 transitions. [2022-11-02 20:40:14,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-02 20:40:14,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:14,601 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:14,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-11-02 20:40:14,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:40:14,813 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-02 20:40:14,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:14,814 INFO L85 PathProgramCache]: Analyzing trace with hash 597234191, now seen corresponding path program 4 times [2022-11-02 20:40:14,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:40:14,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [317035667] [2022-11-02 20:40:14,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:40:14,815 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:40:14,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:40:14,816 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:40:14,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-02 20:40:14,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:40:14,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:40:14,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-02 20:40:14,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:40:14,969 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 8 treesize of output 7 [2022-11-02 20:40:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 54 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:40:15,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:40:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:22,206 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:40:22,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [317035667] [2022-11-02 20:40:22,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [317035667] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:40:22,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:40:22,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 29 [2022-11-02 20:40:22,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635015834] [2022-11-02 20:40:22,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:40:22,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-02 20:40:22,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:40:22,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-02 20:40:22,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:40:22,215 INFO L87 Difference]: Start difference. First operand 99 states and 113 transitions. Second operand has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:24,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:24,524 INFO L93 Difference]: Finished difference Result 141 states and 154 transitions. [2022-11-02 20:40:24,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 20:40:24,525 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-02 20:40:24,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:24,526 INFO L225 Difference]: With dead ends: 141 [2022-11-02 20:40:24,526 INFO L226 Difference]: Without dead ends: 130 [2022-11-02 20:40:24,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 20:40:24,528 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 53 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:24,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 184 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 109 Invalid, 0 Unknown, 47 Unchecked, 0.7s Time] [2022-11-02 20:40:24,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-02 20:40:24,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2022-11-02 20:40:24,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 103 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:24,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2022-11-02 20:40:24,534 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 44 [2022-11-02 20:40:24,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:24,534 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2022-11-02 20:40:24,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:24,535 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2022-11-02 20:40:24,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-02 20:40:24,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:24,536 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:24,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-02 20:40:24,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:40:24,743 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-02 20:40:24,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:24,744 INFO L85 PathProgramCache]: Analyzing trace with hash 557214165, now seen corresponding path program 5 times [2022-11-02 20:40:24,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:40:24,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621837385] [2022-11-02 20:40:24,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:40:24,745 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:40:24,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:40:24,747 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:40:24,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-02 20:40:25,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-02 20:40:25,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:40:25,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:40:25,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:40:25,069 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 8 treesize of output 7 [2022-11-02 20:40:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 8 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:26,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:40:32,556 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:32,556 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:40:32,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621837385] [2022-11-02 20:40:32,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621837385] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:40:32,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:40:32,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2022-11-02 20:40:32,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365016873] [2022-11-02 20:40:32,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:40:32,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:40:32,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:40:32,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:40:32,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:40:32,558 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 34 states, 34 states have (on average 3.0) internal successors, (102), 34 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:47,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:47,376 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2022-11-02 20:40:47,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-02 20:40:47,378 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0) internal successors, (102), 34 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-02 20:40:47,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:47,378 INFO L225 Difference]: With dead ends: 155 [2022-11-02 20:40:47,379 INFO L226 Difference]: Without dead ends: 141 [2022-11-02 20:40:47,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=634, Invalid=2788, Unknown=0, NotChecked=0, Total=3422 [2022-11-02 20:40:47,381 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 248 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:47,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 226 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-02 20:40:47,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-02 20:40:47,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2022-11-02 20:40:47,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 136 states have (on average 1.1102941176470589) internal successors, (151), 137 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:47,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 151 transitions. [2022-11-02 20:40:47,386 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 151 transitions. Word has length 52 [2022-11-02 20:40:47,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:47,386 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 151 transitions. [2022-11-02 20:40:47,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.0) internal successors, (102), 34 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:47,387 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 151 transitions. [2022-11-02 20:40:47,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-02 20:40:47,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:47,389 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:47,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-02 20:40:47,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:40:47,603 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-02 20:40:47,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:47,604 INFO L85 PathProgramCache]: Analyzing trace with hash -724026728, now seen corresponding path program 6 times [2022-11-02 20:40:47,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:40:47,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [987974195] [2022-11-02 20:40:47,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:40:47,604 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:40:47,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:40:47,606 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:40:47,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-02 20:40:47,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-11-02 20:40:47,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:40:47,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-02 20:40:47,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:40:47,962 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 8 treesize of output 7 [2022-11-02 20:40:49,964 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 26 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:49,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:02,070 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:41:02,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [987974195] [2022-11-02 20:41:02,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [987974195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:02,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:41:02,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 42 [2022-11-02 20:41:02,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791244776] [2022-11-02 20:41:02,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:02,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-02 20:41:02,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:41:02,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-02 20:41:02,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1481, Unknown=0, NotChecked=0, Total=1722 [2022-11-02 20:41:02,073 INFO L87 Difference]: Start difference. First operand 138 states and 151 transitions. Second operand has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 42 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:13,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:41:15,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:41:21,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:41:22,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:41:24,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:41:54,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:54,200 INFO L93 Difference]: Finished difference Result 250 states and 263 transitions. [2022-11-02 20:41:54,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-02 20:41:54,202 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 42 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-02 20:41:54,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:54,203 INFO L225 Difference]: With dead ends: 250 [2022-11-02 20:41:54,203 INFO L226 Difference]: Without dead ends: 227 [2022-11-02 20:41:54,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 45.5s TimeCoverageRelationStatistics Valid=1166, Invalid=6666, Unknown=0, NotChecked=0, Total=7832 [2022-11-02 20:41:54,206 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 346 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:54,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 359 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 893 Invalid, 0 Unknown, 229 Unchecked, 16.4s Time] [2022-11-02 20:41:54,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-02 20:41:54,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 138. [2022-11-02 20:41:54,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 136 states have (on average 1.1029411764705883) internal successors, (150), 137 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:54,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 150 transitions. [2022-11-02 20:41:54,211 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 150 transitions. Word has length 56 [2022-11-02 20:41:54,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:54,211 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 150 transitions. [2022-11-02 20:41:54,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 42 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:54,211 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 150 transitions. [2022-11-02 20:41:54,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-02 20:41:54,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:54,212 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:54,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:54,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:41:54,422 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-02 20:41:54,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:54,422 INFO L85 PathProgramCache]: Analyzing trace with hash 488520603, now seen corresponding path program 7 times [2022-11-02 20:41:54,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:41:54,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719498957] [2022-11-02 20:41:54,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:41:54,423 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:41:54,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:41:54,424 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:41:54,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-02 20:41:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:54,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:41:54,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:54,601 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 8 treesize of output 7 [2022-11-02 20:41:56,080 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 34 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:56,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:05,957 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:05,957 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:42:05,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719498957] [2022-11-02 20:42:05,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719498957] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:42:05,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:42:05,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 39 [2022-11-02 20:42:05,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088184965] [2022-11-02 20:42:05,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:05,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-02 20:42:05,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:42:05,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-02 20:42:05,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1276, Unknown=0, NotChecked=0, Total=1482 [2022-11-02 20:42:05,960 INFO L87 Difference]: Start difference. First operand 138 states and 150 transitions. Second operand has 39 states, 39 states have (on average 3.0256410256410255) internal successors, (118), 39 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:42:11,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:11,623 INFO L93 Difference]: Finished difference Result 228 states and 239 transitions. [2022-11-02 20:42:11,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-02 20:42:11,625 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.0256410256410255) internal successors, (118), 39 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-02 20:42:11,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:11,626 INFO L225 Difference]: With dead ends: 228 [2022-11-02 20:42:11,626 INFO L226 Difference]: Without dead ends: 209 [2022-11-02 20:42:11,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=302, Invalid=1768, Unknown=0, NotChecked=0, Total=2070 [2022-11-02 20:42:11,628 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 74 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:11,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 296 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 376 Invalid, 0 Unknown, 65 Unchecked, 3.0s Time] [2022-11-02 20:42:11,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-11-02 20:42:11,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 174. [2022-11-02 20:42:11,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 172 states have (on average 1.0813953488372092) internal successors, (186), 173 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:42:11,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 186 transitions. [2022-11-02 20:42:11,633 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 186 transitions. Word has length 60 [2022-11-02 20:42:11,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:11,634 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 186 transitions. [2022-11-02 20:42:11,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.0256410256410255) internal successors, (118), 39 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:42:11,634 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 186 transitions. [2022-11-02 20:42:11,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-02 20:42:11,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:11,636 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:11,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:11,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:42:11,847 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-02 20:42:11,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:11,847 INFO L85 PathProgramCache]: Analyzing trace with hash -749046242, now seen corresponding path program 8 times [2022-11-02 20:42:11,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:42:11,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1301532484] [2022-11-02 20:42:11,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:42:11,848 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:42:11,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:42:11,849 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:42:11,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-02 20:42:12,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:42:12,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:42:12,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-02 20:42:12,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:12,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-02 20:42:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:13,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 27 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:24,117 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:42:24,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1301532484] [2022-11-02 20:42:24,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1301532484] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:42:24,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:42:24,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 41 [2022-11-02 20:42:24,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981750217] [2022-11-02 20:42:24,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:24,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-02 20:42:24,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:42:24,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-02 20:42:24,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1438, Unknown=0, NotChecked=0, Total=1722 [2022-11-02 20:42:24,120 INFO L87 Difference]: Start difference. First operand 174 states and 186 transitions. Second operand has 42 states, 41 states have (on average 3.073170731707317) internal successors, (126), 42 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:12,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:12,821 INFO L93 Difference]: Finished difference Result 278 states and 288 transitions. [2022-11-02 20:43:12,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-02 20:43:12,823 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.073170731707317) internal successors, (126), 42 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-11-02 20:43:12,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:12,825 INFO L225 Difference]: With dead ends: 278 [2022-11-02 20:43:12,825 INFO L226 Difference]: Without dead ends: 278 [2022-11-02 20:43:12,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1906 ImplicationChecksByTransitivity, 52.6s TimeCoverageRelationStatistics Valid=1582, Invalid=6250, Unknown=0, NotChecked=0, Total=7832 [2022-11-02 20:43:12,827 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 337 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:12,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 343 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 939 Invalid, 0 Unknown, 60 Unchecked, 4.0s Time] [2022-11-02 20:43:12,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-11-02 20:43:12,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 132. [2022-11-02 20:43:12,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 130 states have (on average 1.0923076923076922) internal successors, (142), 131 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:12,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 142 transitions. [2022-11-02 20:43:12,832 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 142 transitions. Word has length 64 [2022-11-02 20:43:12,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:12,833 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 142 transitions. [2022-11-02 20:43:12,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.073170731707317) internal successors, (126), 42 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:12,833 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 142 transitions. [2022-11-02 20:43:12,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-02 20:43:12,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:12,834 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1] [2022-11-02 20:43:12,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:13,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:43:13,047 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-02 20:43:13,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:13,048 INFO L85 PathProgramCache]: Analyzing trace with hash 58542645, now seen corresponding path program 4 times [2022-11-02 20:43:13,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:43:13,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2085834720] [2022-11-02 20:43:13,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:43:13,049 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:43:13,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:43:13,049 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:43:13,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbef3a67-537e-4c61-b170-80ed4d582313/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-02 20:43:13,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:43:13,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:43:13,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-02 20:43:13,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:13,211 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 8 treesize of output 7 [2022-11-02 20:43:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:15,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:27,263 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:43:27,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2085834720] [2022-11-02 20:43:27,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2085834720] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:27,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:43:27,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2022-11-02 20:43:27,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699209534] [2022-11-02 20:43:27,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:27,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-02 20:43:27,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:43:27,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-02 20:43:27,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2022-11-02 20:43:27,265 INFO L87 Difference]: Start difference. First operand 132 states and 142 transitions. Second operand has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)