./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a 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_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R --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 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 --- 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-38b53e6 [2022-11-25 15:46:54,614 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:46:54,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:46:54,640 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:46:54,645 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:46:54,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:46:54,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:46:54,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:46:54,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:46:54,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:46:54,669 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:46:54,671 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:46:54,671 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:46:54,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:46:54,677 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:46:54,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:46:54,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:46:54,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:46:54,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:46:54,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:46:54,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:46:54,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:46:54,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:46:54,699 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:46:54,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:46:54,710 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:46:54,711 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:46:54,713 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:46:54,713 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:46:54,714 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:46:54,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:46:54,716 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:46:54,718 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:46:54,719 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:46:54,722 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:46:54,722 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:46:54,723 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:46:54,724 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:46:54,724 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:46:54,725 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:46:54,726 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:46:54,727 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 15:46:54,772 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:46:54,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:46:54,773 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:46:54,774 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:46:54,775 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:46:54,775 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:46:54,776 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:46:54,776 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:46:54,776 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:46:54,777 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:46:54,778 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:46:54,778 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 15:46:54,778 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:46:54,779 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:46:54,779 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:46:54,779 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 15:46:54,779 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 15:46:54,780 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 15:46:54,780 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:46:54,780 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 15:46:54,780 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:46:54,781 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:46:54,781 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:46:54,781 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:46:54,781 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:46:54,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:46:54,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:46:54,782 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:46:54,783 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:46:54,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:46:54,783 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:46:54,784 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:46:54,784 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:46:54,784 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 [2022-11-25 15:46:55,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:46:55,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:46:55,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:46:55,149 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:46:55,151 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:46:55,152 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2022-11-25 15:46:58,311 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:46:58,641 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:46:58,641 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2022-11-25 15:46:58,649 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/data/d7e9721f9/6c9dcff28c2b456eac96697a1b77c064/FLAG773e4bd0f [2022-11-25 15:46:58,669 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/data/d7e9721f9/6c9dcff28c2b456eac96697a1b77c064 [2022-11-25 15:46:58,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:46:58,674 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:46:58,680 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:46:58,680 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:46:58,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:46:58,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:46:58" (1/1) ... [2022-11-25 15:46:58,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21a02ff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:46:58, skipping insertion in model container [2022-11-25 15:46:58,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:46:58" (1/1) ... [2022-11-25 15:46:58,695 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:46:58,718 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:46:58,959 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2022-11-25 15:46:58,989 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:46:59,004 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) [2022-11-25 15:46:59,005 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@e4d016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:46:59, skipping insertion in model container [2022-11-25 15:46:59,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:46:59,007 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 15:46:59,011 INFO L158 Benchmark]: Toolchain (without parser) took 335.07ms. Allocated memory is still 178.3MB. Free memory was 142.3MB in the beginning and 132.6MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-25 15:46:59,012 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 117.4MB. Free memory was 82.6MB in the beginning and 82.6MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 15:46:59,013 INFO L158 Benchmark]: CACSL2BoogieTranslator took 327.53ms. Allocated memory is still 178.3MB. Free memory was 142.3MB in the beginning and 132.6MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-25 15:46:59,015 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 117.4MB. Free memory was 82.6MB in the beginning and 82.6MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 327.53ms. Allocated memory is still 178.3MB. Free memory was 142.3MB in the beginning and 132.6MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 94]: 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_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R --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 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 --- 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-38b53e6 [2022-11-25 15:47:01,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:47:01,507 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:47:01,534 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:47:01,535 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:47:01,536 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:47:01,538 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:47:01,540 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:47:01,542 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:47:01,543 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:47:01,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:47:01,546 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:47:01,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:47:01,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:47:01,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:47:01,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:47:01,551 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:47:01,552 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:47:01,554 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:47:01,556 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:47:01,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:47:01,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:47:01,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:47:01,562 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:47:01,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:47:01,566 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:47:01,566 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:47:01,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:47:01,568 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:47:01,569 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:47:01,570 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:47:01,571 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:47:01,572 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:47:01,582 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:47:01,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:47:01,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:47:01,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:47:01,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:47:01,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:47:01,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:47:01,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:47:01,589 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-25 15:47:01,635 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:47:01,643 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:47:01,644 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:47:01,644 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:47:01,645 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:47:01,646 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:47:01,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:47:01,647 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:47:01,647 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:47:01,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:47:01,648 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:47:01,648 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 15:47:01,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:47:01,649 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:47:01,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:47:01,649 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 15:47:01,649 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 15:47:01,650 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 15:47:01,650 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:47:01,650 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 15:47:01,650 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 15:47:01,651 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 15:47:01,651 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:47:01,651 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:47:01,651 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:47:01,652 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:47:01,652 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:47:01,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:47:01,652 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:47:01,653 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:47:01,653 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-25 15:47:01,653 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 15:47:01,653 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:47:01,654 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:47:01,654 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:47:01,654 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-25 15:47:01,654 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 [2022-11-25 15:47:01,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:47:02,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:47:02,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:47:02,009 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:47:02,009 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:47:02,011 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2022-11-25 15:47:05,248 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:47:05,489 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:47:05,489 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2022-11-25 15:47:05,496 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/data/357da477e/fa10b9599349439bb7f89065f84904b7/FLAG919918d0c [2022-11-25 15:47:05,512 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/data/357da477e/fa10b9599349439bb7f89065f84904b7 [2022-11-25 15:47:05,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:47:05,516 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:47:05,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:47:05,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:47:05,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:47:05,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:47:05" (1/1) ... [2022-11-25 15:47:05,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d3ddc32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:47:05, skipping insertion in model container [2022-11-25 15:47:05,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:47:05" (1/1) ... [2022-11-25 15:47:05,531 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:47:05,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:47:05,774 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2022-11-25 15:47:05,796 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:47:05,817 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 15:47:05,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:47:05,847 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2022-11-25 15:47:05,866 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:47:05,878 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:47:05,915 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2022-11-25 15:47:05,931 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:47:05,953 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:47:05,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:47:05 WrapperNode [2022-11-25 15:47:05,953 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:47:05,955 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:47:05,955 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:47:05,955 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:47:05,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:47:05" (1/1) ... [2022-11-25 15:47:05,988 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:47:05" (1/1) ... [2022-11-25 15:47:06,026 INFO L138 Inliner]: procedures = 25, calls = 29, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 108 [2022-11-25 15:47:06,027 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:47:06,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:47:06,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:47:06,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:47:06,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:47:05" (1/1) ... [2022-11-25 15:47:06,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:47:05" (1/1) ... [2022-11-25 15:47:06,060 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:47:05" (1/1) ... [2022-11-25 15:47:06,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:47:05" (1/1) ... [2022-11-25 15:47:06,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:47:05" (1/1) ... [2022-11-25 15:47:06,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:47:05" (1/1) ... [2022-11-25 15:47:06,091 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:47:05" (1/1) ... [2022-11-25 15:47:06,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:47:05" (1/1) ... [2022-11-25 15:47:06,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:47:06,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:47:06,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:47:06,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:47:06,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:47:05" (1/1) ... [2022-11-25 15:47:06,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:47:06,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:47:06,173 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:47:06,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:47:06,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:47:06,235 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 15:47:06,235 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 15:47:06,235 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 15:47:06,236 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 15:47:06,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 15:47:06,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:47:06,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 15:47:06,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 15:47:06,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:47:06,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:47:06,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:47:06,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 15:47:06,239 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 15:47:06,388 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:47:06,390 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:47:06,901 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:47:06,917 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:47:06,917 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 15:47:06,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:47:06 BoogieIcfgContainer [2022-11-25 15:47:06,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:47:06,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:47:06,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:47:06,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:47:06,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:47:05" (1/3) ... [2022-11-25 15:47:06,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31d51d16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:47:06, skipping insertion in model container [2022-11-25 15:47:06,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:47:05" (2/3) ... [2022-11-25 15:47:06,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31d51d16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:47:06, skipping insertion in model container [2022-11-25 15:47:06,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:47:06" (3/3) ... [2022-11-25 15:47:06,929 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2022-11-25 15:47:06,949 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:47:06,949 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-11-25 15:47:06,949 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 15:47:07,110 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 15:47:07,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 194 transitions, 404 flow [2022-11-25 15:47:07,282 INFO L130 PetriNetUnfolder]: 15/192 cut-off events. [2022-11-25 15:47:07,282 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 15:47:07,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 192 events. 15/192 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 224 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 140. Up to 3 conditions per place. [2022-11-25 15:47:07,288 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 194 transitions, 404 flow [2022-11-25 15:47:07,295 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 187 transitions, 386 flow [2022-11-25 15:47:07,299 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:47:07,314 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 187 transitions, 386 flow [2022-11-25 15:47:07,317 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 187 transitions, 386 flow [2022-11-25 15:47:07,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 187 transitions, 386 flow [2022-11-25 15:47:07,384 INFO L130 PetriNetUnfolder]: 15/187 cut-off events. [2022-11-25 15:47:07,384 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 15:47:07,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 187 events. 15/187 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 223 event pairs, 0 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 140. Up to 3 conditions per place. [2022-11-25 15:47:07,388 INFO L119 LiptonReduction]: Number of co-enabled transitions 1720 [2022-11-25 15:47:33,449 INFO L134 LiptonReduction]: Checked pairs total: 2498 [2022-11-25 15:47:33,449 INFO L136 LiptonReduction]: Total number of compositions: 202 [2022-11-25 15:47:33,466 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:47:33,473 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=PETRI_NET, 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;@5f526742, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:47:33,473 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2022-11-25 15:47:33,475 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 15:47:33,476 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:47:33,476 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:47:33,477 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 15:47:33,477 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 15:47:33,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:47:33,483 INFO L85 PathProgramCache]: Analyzing trace with hash 23120, now seen corresponding path program 1 times [2022-11-25 15:47:33,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:47:33,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744155960] [2022-11-25 15:47:33,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:47:33,496 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:47:33,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:47:33,504 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:47:33,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-25 15:47:33,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:47:33,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:47:33,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:47:33,773 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 15:47:33,774 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 15:47:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:47:33,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:47:33,810 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:47:33,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744155960] [2022-11-25 15:47:33,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744155960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:47:33,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:47:33,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:47:33,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990477132] [2022-11-25 15:47:33,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:47:33,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:47:33,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:47:33,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:47:33,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:47:34,099 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 396 [2022-11-25 15:47:34,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 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) [2022-11-25 15:47:34,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:47:34,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 396 [2022-11-25 15:47:34,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:47:34,478 INFO L130 PetriNetUnfolder]: 377/606 cut-off events. [2022-11-25 15:47:34,478 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 15:47:34,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1239 conditions, 606 events. 377/606 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 2502 event pairs, 287 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 1106. Up to 606 conditions per place. [2022-11-25 15:47:34,488 INFO L137 encePairwiseOnDemand]: 392/396 looper letters, 36 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2022-11-25 15:47:34,488 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 37 transitions, 160 flow [2022-11-25 15:47:34,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:47:34,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:47:34,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 550 transitions. [2022-11-25 15:47:34,515 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2022-11-25 15:47:34,516 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 550 transitions. [2022-11-25 15:47:34,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 550 transitions. [2022-11-25 15:47:34,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:47:34,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 550 transitions. [2022-11-25 15:47:34,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 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) [2022-11-25 15:47:34,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 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) [2022-11-25 15:47:34,541 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 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) [2022-11-25 15:47:34,543 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 92 flow. Second operand 3 states and 550 transitions. [2022-11-25 15:47:34,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 37 transitions, 160 flow [2022-11-25 15:47:34,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 37 transitions, 152 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 15:47:34,556 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 80 flow [2022-11-25 15:47:34,558 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2022-11-25 15:47:34,565 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2022-11-25 15:47:34,566 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 80 flow [2022-11-25 15:47:34,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 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) [2022-11-25 15:47:34,567 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:47:34,568 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 15:47:34,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-25 15:47:34,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:47:34,780 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 15:47:34,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:47:34,781 INFO L85 PathProgramCache]: Analyzing trace with hash 23121, now seen corresponding path program 1 times [2022-11-25 15:47:34,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:47:34,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625562301] [2022-11-25 15:47:34,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:47:34,782 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:47:34,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:47:34,783 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:47:34,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-25 15:47:34,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:47:34,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 15:47:34,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:47:34,947 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 15:47:34,947 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 15:47:34,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:47:34,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:47:34,977 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:47:34,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625562301] [2022-11-25 15:47:34,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625562301] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:47:34,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:47:34,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:47:34,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376979812] [2022-11-25 15:47:34,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:47:34,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:47:34,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:47:34,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:47:34,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:47:35,273 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 396 [2022-11-25 15:47:35,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 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) [2022-11-25 15:47:35,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:47:35,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 396 [2022-11-25 15:47:35,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:47:35,903 INFO L130 PetriNetUnfolder]: 753/1209 cut-off events. [2022-11-25 15:47:35,903 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:47:35,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2438 conditions, 1209 events. 753/1209 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 5833 event pairs, 574 based on Foata normal form. 0/323 useless extension candidates. Maximal degree in co-relation 2432. Up to 607 conditions per place. [2022-11-25 15:47:35,911 INFO L137 encePairwiseOnDemand]: 390/396 looper letters, 67 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2022-11-25 15:47:35,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 71 transitions, 294 flow [2022-11-25 15:47:35,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:47:35,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:47:35,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 583 transitions. [2022-11-25 15:47:35,913 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49074074074074076 [2022-11-25 15:47:35,914 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 583 transitions. [2022-11-25 15:47:35,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 583 transitions. [2022-11-25 15:47:35,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:47:35,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 583 transitions. [2022-11-25 15:47:35,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 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) [2022-11-25 15:47:35,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 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) [2022-11-25 15:47:35,920 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 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) [2022-11-25 15:47:35,920 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 80 flow. Second operand 3 states and 583 transitions. [2022-11-25 15:47:35,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 71 transitions, 294 flow [2022-11-25 15:47:35,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 71 transitions, 293 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:47:35,923 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 111 flow [2022-11-25 15:47:35,923 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2022-11-25 15:47:35,924 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -2 predicate places. [2022-11-25 15:47:35,924 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 111 flow [2022-11-25 15:47:35,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 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) [2022-11-25 15:47:35,925 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:47:35,925 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 15:47:35,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:47:36,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:47:36,136 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 15:47:36,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:47:36,139 INFO L85 PathProgramCache]: Analyzing trace with hash 721858, now seen corresponding path program 1 times [2022-11-25 15:47:36,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:47:36,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [311532045] [2022-11-25 15:47:36,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:47:36,140 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:47:36,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:47:36,144 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:47:36,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-25 15:47:36,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:47:36,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 15:47:36,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:47:36,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:47:36,315 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 15:47:36,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-25 15:47:36,434 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 15:47:36,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 15:47:36,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:47:36,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:47:36,470 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:47:36,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [311532045] [2022-11-25 15:47:36,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [311532045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:47:36,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:47:36,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:47:36,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830691850] [2022-11-25 15:47:36,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:47:36,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:47:36,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:47:36,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:47:36,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:47:36,744 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 396 [2022-11-25 15:47:36,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 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) [2022-11-25 15:47:36,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:47:36,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 396 [2022-11-25 15:47:36,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:47:37,164 INFO L130 PetriNetUnfolder]: 573/943 cut-off events. [2022-11-25 15:47:37,165 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:47:37,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1920 conditions, 943 events. 573/943 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 4384 event pairs, 432 based on Foata normal form. 0/289 useless extension candidates. Maximal degree in co-relation 1911. Up to 943 conditions per place. [2022-11-25 15:47:37,170 INFO L137 encePairwiseOnDemand]: 393/396 looper letters, 37 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2022-11-25 15:47:37,171 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 38 transitions, 183 flow [2022-11-25 15:47:37,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:47:37,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:47:37,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 556 transitions. [2022-11-25 15:47:37,174 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.468013468013468 [2022-11-25 15:47:37,174 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 556 transitions. [2022-11-25 15:47:37,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 556 transitions. [2022-11-25 15:47:37,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:47:37,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 556 transitions. [2022-11-25 15:47:37,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 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) [2022-11-25 15:47:37,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 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) [2022-11-25 15:47:37,180 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 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) [2022-11-25 15:47:37,180 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 111 flow. Second operand 3 states and 556 transitions. [2022-11-25 15:47:37,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 38 transitions, 183 flow [2022-11-25 15:47:37,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 175 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:47:37,182 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 101 flow [2022-11-25 15:47:37,183 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2022-11-25 15:47:37,183 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -4 predicate places. [2022-11-25 15:47:37,184 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 101 flow [2022-11-25 15:47:37,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 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) [2022-11-25 15:47:37,184 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:47:37,185 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 15:47:37,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-25 15:47:37,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:47:37,396 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 15:47:37,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:47:37,397 INFO L85 PathProgramCache]: Analyzing trace with hash 720032, now seen corresponding path program 1 times [2022-11-25 15:47:37,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:47:37,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1205619898] [2022-11-25 15:47:37,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:47:37,398 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:47:37,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:47:37,399 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:47:37,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-25 15:47:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:47:37,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 15:47:37,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:47:37,557 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 15:47:37,557 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 15:47:37,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:47:37,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:47:37,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:47:37,906 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:47:37,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1205619898] [2022-11-25 15:47:37,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1205619898] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:47:37,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:47:37,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-25 15:47:37,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212980786] [2022-11-25 15:47:37,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:47:37,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 15:47:37,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:47:37,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 15:47:37,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 15:47:39,231 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 396 [2022-11-25 15:47:39,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 101 flow. Second operand has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 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) [2022-11-25 15:47:39,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:47:39,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 396 [2022-11-25 15:47:39,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:47:41,136 INFO L130 PetriNetUnfolder]: 865/1423 cut-off events. [2022-11-25 15:47:41,137 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:47:41,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2894 conditions, 1423 events. 865/1423 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 6895 event pairs, 648 based on Foata normal form. 0/436 useless extension candidates. Maximal degree in co-relation 2885. Up to 473 conditions per place. [2022-11-25 15:47:41,145 INFO L137 encePairwiseOnDemand]: 388/396 looper letters, 92 selfloop transitions, 17 changer transitions 0/109 dead transitions. [2022-11-25 15:47:41,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 109 transitions, 487 flow [2022-11-25 15:47:41,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:47:41,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:47:41,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1075 transitions. [2022-11-25 15:47:41,149 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4524410774410774 [2022-11-25 15:47:41,149 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1075 transitions. [2022-11-25 15:47:41,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1075 transitions. [2022-11-25 15:47:41,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:47:41,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1075 transitions. [2022-11-25 15:47:41,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 179.16666666666666) internal successors, (1075), 6 states have internal predecessors, (1075), 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) [2022-11-25 15:47:41,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 396.0) internal successors, (2772), 7 states have internal predecessors, (2772), 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) [2022-11-25 15:47:41,160 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 396.0) internal successors, (2772), 7 states have internal predecessors, (2772), 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) [2022-11-25 15:47:41,161 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 101 flow. Second operand 6 states and 1075 transitions. [2022-11-25 15:47:41,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 109 transitions, 487 flow [2022-11-25 15:47:41,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 109 transitions, 486 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:47:41,166 INFO L231 Difference]: Finished difference. Result has 46 places, 51 transitions, 229 flow [2022-11-25 15:47:41,166 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=229, PETRI_PLACES=46, PETRI_TRANSITIONS=51} [2022-11-25 15:47:41,168 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2022-11-25 15:47:41,168 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 51 transitions, 229 flow [2022-11-25 15:47:41,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 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) [2022-11-25 15:47:41,169 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:47:41,169 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 15:47:41,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-25 15:47:41,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:47:41,381 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 15:47:41,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:47:41,381 INFO L85 PathProgramCache]: Analyzing trace with hash 721857, now seen corresponding path program 1 times [2022-11-25 15:47:41,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:47:41,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15501335] [2022-11-25 15:47:41,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:47:41,382 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:47:41,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:47:41,384 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:47:41,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-25 15:47:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:47:41,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 15:47:41,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:47:41,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:47:41,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:47:41,526 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 15:47:41,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-25 15:47:41,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-25 15:47:41,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:47:41,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 15:47:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:47:41,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:47:41,635 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:47:41,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15501335] [2022-11-25 15:47:41,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15501335] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:47:41,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:47:41,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:47:41,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857640545] [2022-11-25 15:47:41,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:47:41,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:47:41,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:47:41,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:47:41,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:47:41,995 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 396 [2022-11-25 15:47:41,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 51 transitions, 229 flow. Second operand has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 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) [2022-11-25 15:47:41,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:47:41,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 396 [2022-11-25 15:47:41,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:47:42,380 INFO L130 PetriNetUnfolder]: 593/1022 cut-off events. [2022-11-25 15:47:42,380 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 15:47:42,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2137 conditions, 1022 events. 593/1022 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 5012 event pairs, 435 based on Foata normal form. 0/385 useless extension candidates. Maximal degree in co-relation 2123. Up to 1022 conditions per place. [2022-11-25 15:47:42,386 INFO L137 encePairwiseOnDemand]: 393/396 looper letters, 46 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2022-11-25 15:47:42,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 47 transitions, 303 flow [2022-11-25 15:47:42,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:47:42,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:47:42,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 554 transitions. [2022-11-25 15:47:42,389 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4663299663299663 [2022-11-25 15:47:42,389 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 554 transitions. [2022-11-25 15:47:42,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 554 transitions. [2022-11-25 15:47:42,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:47:42,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 554 transitions. [2022-11-25 15:47:42,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 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) [2022-11-25 15:47:42,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 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) [2022-11-25 15:47:42,395 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 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) [2022-11-25 15:47:42,395 INFO L175 Difference]: Start difference. First operand has 46 places, 51 transitions, 229 flow. Second operand 3 states and 554 transitions. [2022-11-25 15:47:42,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 47 transitions, 303 flow [2022-11-25 15:47:42,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 47 transitions, 284 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 15:47:42,398 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 192 flow [2022-11-25 15:47:42,398 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2022-11-25 15:47:42,399 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2022-11-25 15:47:42,399 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 192 flow [2022-11-25 15:47:42,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 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) [2022-11-25 15:47:42,400 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:47:42,400 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 15:47:42,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-25 15:47:42,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:47:42,611 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 15:47:42,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:47:42,612 INFO L85 PathProgramCache]: Analyzing trace with hash 693722343, now seen corresponding path program 1 times [2022-11-25 15:47:42,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:47:42,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777471280] [2022-11-25 15:47:42,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:47:42,614 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:47:42,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:47:42,616 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:47:42,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-25 15:47:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:47:42,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 15:47:42,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:47:42,726 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 15:47:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:47:42,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:47:42,809 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:47:42,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1777471280] [2022-11-25 15:47:42,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1777471280] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:47:42,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:47:42,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:47:42,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436253708] [2022-11-25 15:47:42,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:47:42,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:47:42,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:47:42,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:47:42,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:47:43,200 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 396 [2022-11-25 15:47:43,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 47 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 167.0) internal successors, (835), 5 states have internal predecessors, (835), 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) [2022-11-25 15:47:43,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:47:43,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 396 [2022-11-25 15:47:43,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:47:43,985 INFO L130 PetriNetUnfolder]: 1109/1904 cut-off events. [2022-11-25 15:47:43,986 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-25 15:47:43,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3910 conditions, 1904 events. 1109/1904 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 11045 event pairs, 375 based on Foata normal form. 0/715 useless extension candidates. Maximal degree in co-relation 3895. Up to 1045 conditions per place. [2022-11-25 15:47:43,996 INFO L137 encePairwiseOnDemand]: 391/396 looper letters, 61 selfloop transitions, 10 changer transitions 0/71 dead transitions. [2022-11-25 15:47:43,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 71 transitions, 385 flow [2022-11-25 15:47:43,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:47:43,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:47:43,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 888 transitions. [2022-11-25 15:47:44,000 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4484848484848485 [2022-11-25 15:47:44,001 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 888 transitions. [2022-11-25 15:47:44,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 888 transitions. [2022-11-25 15:47:44,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:47:44,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 888 transitions. [2022-11-25 15:47:44,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 177.6) internal successors, (888), 5 states have internal predecessors, (888), 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) [2022-11-25 15:47:44,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 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) [2022-11-25 15:47:44,009 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 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) [2022-11-25 15:47:44,009 INFO L175 Difference]: Start difference. First operand has 45 places, 47 transitions, 192 flow. Second operand 5 states and 888 transitions. [2022-11-25 15:47:44,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 71 transitions, 385 flow [2022-11-25 15:47:44,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 71 transitions, 384 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:47:44,015 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 221 flow [2022-11-25 15:47:44,015 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=49, PETRI_TRANSITIONS=48} [2022-11-25 15:47:44,018 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2022-11-25 15:47:44,019 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 221 flow [2022-11-25 15:47:44,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 167.0) internal successors, (835), 5 states have internal predecessors, (835), 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) [2022-11-25 15:47:44,025 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:47:44,025 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 15:47:44,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-25 15:47:44,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:47:44,242 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 15:47:44,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:47:44,242 INFO L85 PathProgramCache]: Analyzing trace with hash 693722342, now seen corresponding path program 1 times [2022-11-25 15:47:44,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:47:44,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940155109] [2022-11-25 15:47:44,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:47:44,243 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:47:44,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:47:44,244 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:47:44,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-25 15:47:44,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:47:44,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 15:47:44,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:47:44,338 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 15:47:44,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:47:44,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:47:44,358 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:47:44,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940155109] [2022-11-25 15:47:44,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940155109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:47:44,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:47:44,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:47:44,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062034464] [2022-11-25 15:47:44,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:47:44,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:47:44,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:47:44,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:47:44,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:47:44,562 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 396 [2022-11-25 15:47:44,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 221 flow. Second operand has 4 states, 4 states have (on average 165.25) internal successors, (661), 4 states have internal predecessors, (661), 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) [2022-11-25 15:47:44,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:47:44,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 396 [2022-11-25 15:47:44,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:47:45,022 INFO L130 PetriNetUnfolder]: 842/1451 cut-off events. [2022-11-25 15:47:45,023 INFO L131 PetriNetUnfolder]: For 127/127 co-relation queries the response was YES. [2022-11-25 15:47:45,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3178 conditions, 1451 events. 842/1451 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 7657 event pairs, 618 based on Foata normal form. 0/713 useless extension candidates. Maximal degree in co-relation 3161. Up to 1433 conditions per place. [2022-11-25 15:47:45,031 INFO L137 encePairwiseOnDemand]: 392/396 looper letters, 42 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2022-11-25 15:47:45,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 309 flow [2022-11-25 15:47:45,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:47:45,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:47:45,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 689 transitions. [2022-11-25 15:47:45,034 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43497474747474746 [2022-11-25 15:47:45,034 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 689 transitions. [2022-11-25 15:47:45,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 689 transitions. [2022-11-25 15:47:45,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:47:45,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 689 transitions. [2022-11-25 15:47:45,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 172.25) internal successors, (689), 4 states have internal predecessors, (689), 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) [2022-11-25 15:47:45,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 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) [2022-11-25 15:47:45,040 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 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) [2022-11-25 15:47:45,040 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 221 flow. Second operand 4 states and 689 transitions. [2022-11-25 15:47:45,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 309 flow [2022-11-25 15:47:45,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 293 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 15:47:45,043 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 209 flow [2022-11-25 15:47:45,043 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=209, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2022-11-25 15:47:45,044 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2022-11-25 15:47:45,044 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 209 flow [2022-11-25 15:47:45,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 165.25) internal successors, (661), 4 states have internal predecessors, (661), 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) [2022-11-25 15:47:45,047 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:47:45,047 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 15:47:45,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-25 15:47:45,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:47:45,259 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 15:47:45,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:47:45,259 INFO L85 PathProgramCache]: Analyzing trace with hash 693722236, now seen corresponding path program 1 times [2022-11-25 15:47:45,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:47:45,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1679963741] [2022-11-25 15:47:45,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:47:45,260 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:47:45,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:47:45,262 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:47:45,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-25 15:47:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:47:45,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 15:47:45,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:47:45,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:47:45,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:47:45,420 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:47:45,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1679963741] [2022-11-25 15:47:45,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1679963741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:47:45,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:47:45,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:47:45,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108437947] [2022-11-25 15:47:45,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:47:45,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:47:45,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:47:45,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:47:45,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:47:45,708 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 396 [2022-11-25 15:47:45,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 209 flow. Second operand has 4 states, 4 states have (on average 169.25) internal successors, (677), 4 states have internal predecessors, (677), 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) [2022-11-25 15:47:45,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:47:45,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 396 [2022-11-25 15:47:45,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:47:46,346 INFO L130 PetriNetUnfolder]: 979/1747 cut-off events. [2022-11-25 15:47:46,346 INFO L131 PetriNetUnfolder]: For 152/152 co-relation queries the response was YES. [2022-11-25 15:47:46,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3771 conditions, 1747 events. 979/1747 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 9775 event pairs, 729 based on Foata normal form. 0/870 useless extension candidates. Maximal degree in co-relation 3754. Up to 1450 conditions per place. [2022-11-25 15:47:46,357 INFO L137 encePairwiseOnDemand]: 390/396 looper letters, 70 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2022-11-25 15:47:46,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 73 transitions, 465 flow [2022-11-25 15:47:46,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:47:46,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:47:46,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 729 transitions. [2022-11-25 15:47:46,361 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2022-11-25 15:47:46,361 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 729 transitions. [2022-11-25 15:47:46,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 729 transitions. [2022-11-25 15:47:46,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:47:46,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 729 transitions. [2022-11-25 15:47:46,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 182.25) internal successors, (729), 4 states have internal predecessors, (729), 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) [2022-11-25 15:47:46,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 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) [2022-11-25 15:47:46,369 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 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) [2022-11-25 15:47:46,369 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 209 flow. Second operand 4 states and 729 transitions. [2022-11-25 15:47:46,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 73 transitions, 465 flow [2022-11-25 15:47:46,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 73 transitions, 457 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:47:46,372 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 217 flow [2022-11-25 15:47:46,373 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=217, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2022-11-25 15:47:46,376 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2022-11-25 15:47:46,376 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 217 flow [2022-11-25 15:47:46,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 169.25) internal successors, (677), 4 states have internal predecessors, (677), 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) [2022-11-25 15:47:46,377 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:47:46,377 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 15:47:46,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-25 15:47:46,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:47:46,589 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 15:47:46,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:47:46,589 INFO L85 PathProgramCache]: Analyzing trace with hash 693722372, now seen corresponding path program 1 times [2022-11-25 15:47:46,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:47:46,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389380829] [2022-11-25 15:47:46,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:47:46,592 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:47:46,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:47:46,593 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:47:46,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-25 15:47:46,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:47:46,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 15:47:46,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:47:46,735 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-25 15:47:46,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-25 15:47:46,774 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 15:47:46,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 15:47:46,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:47:46,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:47:46,791 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:47:46,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389380829] [2022-11-25 15:47:46,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389380829] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:47:46,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:47:46,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:47:46,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715027218] [2022-11-25 15:47:46,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:47:46,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:47:46,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:47:46,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:47:46,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:47:46,933 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 396 [2022-11-25 15:47:46,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 217 flow. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 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) [2022-11-25 15:47:46,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:47:46,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 396 [2022-11-25 15:47:46,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:47:47,378 INFO L130 PetriNetUnfolder]: 892/1576 cut-off events. [2022-11-25 15:47:47,379 INFO L131 PetriNetUnfolder]: For 176/176 co-relation queries the response was YES. [2022-11-25 15:47:47,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3657 conditions, 1576 events. 892/1576 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 8615 event pairs, 660 based on Foata normal form. 0/915 useless extension candidates. Maximal degree in co-relation 3639. Up to 1576 conditions per place. [2022-11-25 15:47:47,388 INFO L137 encePairwiseOnDemand]: 393/396 looper letters, 43 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2022-11-25 15:47:47,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 44 transitions, 301 flow [2022-11-25 15:47:47,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:47:47,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:47:47,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 544 transitions. [2022-11-25 15:47:47,391 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45791245791245794 [2022-11-25 15:47:47,391 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 544 transitions. [2022-11-25 15:47:47,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 544 transitions. [2022-11-25 15:47:47,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:47:47,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 544 transitions. [2022-11-25 15:47:47,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 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) [2022-11-25 15:47:47,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 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) [2022-11-25 15:47:47,396 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 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) [2022-11-25 15:47:47,396 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 217 flow. Second operand 3 states and 544 transitions. [2022-11-25 15:47:47,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 44 transitions, 301 flow [2022-11-25 15:47:47,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 44 transitions, 295 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-25 15:47:47,399 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 209 flow [2022-11-25 15:47:47,399 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=209, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2022-11-25 15:47:47,400 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2022-11-25 15:47:47,400 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 209 flow [2022-11-25 15:47:47,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 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) [2022-11-25 15:47:47,401 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:47:47,401 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 15:47:47,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-25 15:47:47,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:47:47,618 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 15:47:47,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:47:47,618 INFO L85 PathProgramCache]: Analyzing trace with hash 693722373, now seen corresponding path program 1 times [2022-11-25 15:47:47,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:47:47,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788740188] [2022-11-25 15:47:47,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:47:47,619 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:47:47,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:47:47,620 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:47:47,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-25 15:47:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:47:47,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 15:47:47,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:47:47,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:47:47,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:47:47,782 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 15:47:47,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-25 15:47:47,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-25 15:47:47,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:47:47,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 15:47:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:47:47,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:47:47,897 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:47:47,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788740188] [2022-11-25 15:47:47,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788740188] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:47:47,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:47:47,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:47:47,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411740510] [2022-11-25 15:47:47,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:47:47,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:47:47,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:47:47,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:47:47,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:47:48,310 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 396 [2022-11-25 15:47:48,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 209 flow. Second operand has 4 states, 4 states have (on average 172.25) internal successors, (689), 4 states have internal predecessors, (689), 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) [2022-11-25 15:47:48,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:47:48,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 396 [2022-11-25 15:47:48,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:47:48,797 INFO L130 PetriNetUnfolder]: 805/1405 cut-off events. [2022-11-25 15:47:48,798 INFO L131 PetriNetUnfolder]: For 175/175 co-relation queries the response was YES. [2022-11-25 15:47:48,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3286 conditions, 1405 events. 805/1405 cut-off events. For 175/175 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 7429 event pairs, 591 based on Foata normal form. 0/876 useless extension candidates. Maximal degree in co-relation 3267. Up to 1405 conditions per place. [2022-11-25 15:47:48,806 INFO L137 encePairwiseOnDemand]: 393/396 looper letters, 41 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2022-11-25 15:47:48,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 42 transitions, 289 flow [2022-11-25 15:47:48,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:47:48,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:47:48,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 542 transitions. [2022-11-25 15:47:48,809 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4562289562289562 [2022-11-25 15:47:48,809 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 542 transitions. [2022-11-25 15:47:48,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 542 transitions. [2022-11-25 15:47:48,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:47:48,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 542 transitions. [2022-11-25 15:47:48,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 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) [2022-11-25 15:47:48,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 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) [2022-11-25 15:47:48,813 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 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) [2022-11-25 15:47:48,813 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 209 flow. Second operand 3 states and 542 transitions. [2022-11-25 15:47:48,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 42 transitions, 289 flow [2022-11-25 15:47:48,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 288 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:47:48,816 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 206 flow [2022-11-25 15:47:48,816 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2022-11-25 15:47:48,816 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2022-11-25 15:47:48,817 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 206 flow [2022-11-25 15:47:48,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 172.25) internal successors, (689), 4 states have internal predecessors, (689), 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) [2022-11-25 15:47:48,817 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:47:48,817 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 15:47:48,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-25 15:47:49,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:47:49,028 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 15:47:49,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:47:49,029 INFO L85 PathProgramCache]: Analyzing trace with hash -21105135, now seen corresponding path program 2 times [2022-11-25 15:47:49,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:47:49,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [406572977] [2022-11-25 15:47:49,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:47:49,029 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:47:49,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:47:49,031 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:47:49,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-25 15:47:49,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:47:49,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:47:49,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:47:49,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:47:49,216 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 15:47:49,216 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 15:47:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:47:49,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:47:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:47:50,251 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:47:50,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [406572977] [2022-11-25 15:47:50,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [406572977] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:47:50,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:47:50,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 15:47:50,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386713840] [2022-11-25 15:47:50,251 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:47:50,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:47:50,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:47:50,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:47:50,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:47:55,537 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 396 [2022-11-25 15:47:55,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 206 flow. Second operand has 12 states, 12 states have (on average 163.0) internal successors, (1956), 12 states have internal predecessors, (1956), 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) [2022-11-25 15:47:55,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:47:55,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 396 [2022-11-25 15:47:55,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:48:00,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:48:02,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:48:04,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:48:06,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:48:07,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:48:09,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:48:14,117 INFO L130 PetriNetUnfolder]: 2664/4642 cut-off events. [2022-11-25 15:48:14,117 INFO L131 PetriNetUnfolder]: For 577/577 co-relation queries the response was YES. [2022-11-25 15:48:14,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10726 conditions, 4642 events. 2664/4642 cut-off events. For 577/577 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 28906 event pairs, 1970 based on Foata normal form. 16/2891 useless extension candidates. Maximal degree in co-relation 10706. Up to 721 conditions per place. [2022-11-25 15:48:14,137 INFO L137 encePairwiseOnDemand]: 389/396 looper letters, 225 selfloop transitions, 33 changer transitions 0/258 dead transitions. [2022-11-25 15:48:14,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 258 transitions, 1434 flow [2022-11-25 15:48:14,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 15:48:14,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 15:48:14,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2689 transitions. [2022-11-25 15:48:14,146 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4526936026936027 [2022-11-25 15:48:14,146 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2689 transitions. [2022-11-25 15:48:14,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2689 transitions. [2022-11-25 15:48:14,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:48:14,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2689 transitions. [2022-11-25 15:48:14,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 179.26666666666668) internal successors, (2689), 15 states have internal predecessors, (2689), 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) [2022-11-25 15:48:14,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 396.0) internal successors, (6336), 16 states have internal predecessors, (6336), 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) [2022-11-25 15:48:14,165 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 396.0) internal successors, (6336), 16 states have internal predecessors, (6336), 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) [2022-11-25 15:48:14,165 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 206 flow. Second operand 15 states and 2689 transitions. [2022-11-25 15:48:14,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 258 transitions, 1434 flow [2022-11-25 15:48:14,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 258 transitions, 1433 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:48:14,171 INFO L231 Difference]: Finished difference. Result has 70 places, 62 transitions, 465 flow [2022-11-25 15:48:14,171 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=465, PETRI_PLACES=70, PETRI_TRANSITIONS=62} [2022-11-25 15:48:14,172 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2022-11-25 15:48:14,172 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 62 transitions, 465 flow [2022-11-25 15:48:14,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.0) internal successors, (1956), 12 states have internal predecessors, (1956), 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) [2022-11-25 15:48:14,173 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:48:14,173 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 15:48:14,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-25 15:48:14,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:48:14,385 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 15:48:14,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:48:14,386 INFO L85 PathProgramCache]: Analyzing trace with hash -19438643, now seen corresponding path program 1 times [2022-11-25 15:48:14,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:48:14,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645075717] [2022-11-25 15:48:14,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:14,386 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:48:14,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:48:14,387 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:48:14,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-25 15:48:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:48:14,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 15:48:14,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:48:14,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:48:14,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:48:14,581 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:48:14,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645075717] [2022-11-25 15:48:14,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645075717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:48:14,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:48:14,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:48:14,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946220228] [2022-11-25 15:48:14,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:48:14,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:48:14,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:48:14,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:48:14,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:48:14,840 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 396 [2022-11-25 15:48:14,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 62 transitions, 465 flow. Second operand has 5 states, 5 states have (on average 168.2) internal successors, (841), 5 states have internal predecessors, (841), 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) [2022-11-25 15:48:14,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:48:14,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 396 [2022-11-25 15:48:14,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:48:15,880 INFO L130 PetriNetUnfolder]: 2465/4323 cut-off events. [2022-11-25 15:48:15,880 INFO L131 PetriNetUnfolder]: For 402/402 co-relation queries the response was YES. [2022-11-25 15:48:15,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10104 conditions, 4323 events. 2465/4323 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 26827 event pairs, 945 based on Foata normal form. 12/2702 useless extension candidates. Maximal degree in co-relation 10073. Up to 2192 conditions per place. [2022-11-25 15:48:15,900 INFO L137 encePairwiseOnDemand]: 388/396 looper letters, 79 selfloop transitions, 15 changer transitions 0/94 dead transitions. [2022-11-25 15:48:15,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 94 transitions, 737 flow [2022-11-25 15:48:15,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:48:15,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:48:15,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 899 transitions. [2022-11-25 15:48:15,903 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.454040404040404 [2022-11-25 15:48:15,903 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 899 transitions. [2022-11-25 15:48:15,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 899 transitions. [2022-11-25 15:48:15,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:48:15,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 899 transitions. [2022-11-25 15:48:15,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 179.8) internal successors, (899), 5 states have internal predecessors, (899), 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) [2022-11-25 15:48:15,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 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) [2022-11-25 15:48:15,910 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 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) [2022-11-25 15:48:15,910 INFO L175 Difference]: Start difference. First operand has 70 places, 62 transitions, 465 flow. Second operand 5 states and 899 transitions. [2022-11-25 15:48:15,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 94 transitions, 737 flow [2022-11-25 15:48:15,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 94 transitions, 669 flow, removed 18 selfloop flow, removed 4 redundant places. [2022-11-25 15:48:15,916 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 458 flow [2022-11-25 15:48:15,917 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=458, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2022-11-25 15:48:15,917 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2022-11-25 15:48:15,917 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 458 flow [2022-11-25 15:48:15,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 168.2) internal successors, (841), 5 states have internal predecessors, (841), 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) [2022-11-25 15:48:15,918 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:48:15,918 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:48:15,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-11-25 15:48:16,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:48:16,130 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 15:48:16,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:48:16,131 INFO L85 PathProgramCache]: Analyzing trace with hash -602987398, now seen corresponding path program 1 times [2022-11-25 15:48:16,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:48:16,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [862993997] [2022-11-25 15:48:16,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:16,131 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:48:16,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:48:16,132 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:48:16,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-25 15:48:16,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:48:16,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 15:48:16,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:48:16,310 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 15:48:16,310 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 15:48:16,368 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 15:48:16,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-25 15:48:16,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:48:16,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:48:16,388 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:48:16,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [862993997] [2022-11-25 15:48:16,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [862993997] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:48:16,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:48:16,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:48:16,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114670358] [2022-11-25 15:48:16,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:48:16,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:48:16,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:48:16,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:48:16,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:48:16,708 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 396 [2022-11-25 15:48:16,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 458 flow. Second operand has 4 states, 4 states have (on average 165.75) internal successors, (663), 4 states have internal predecessors, (663), 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) [2022-11-25 15:48:16,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:48:16,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 396 [2022-11-25 15:48:16,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:48:17,409 INFO L130 PetriNetUnfolder]: 1778/3156 cut-off events. [2022-11-25 15:48:17,409 INFO L131 PetriNetUnfolder]: For 861/861 co-relation queries the response was YES. [2022-11-25 15:48:17,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7826 conditions, 3156 events. 1778/3156 cut-off events. For 861/861 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 18861 event pairs, 1230 based on Foata normal form. 0/2184 useless extension candidates. Maximal degree in co-relation 7792. Up to 3143 conditions per place. [2022-11-25 15:48:17,425 INFO L137 encePairwiseOnDemand]: 392/396 looper letters, 49 selfloop transitions, 12 changer transitions 0/61 dead transitions. [2022-11-25 15:48:17,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 61 transitions, 572 flow [2022-11-25 15:48:17,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:48:17,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:48:17,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 683 transitions. [2022-11-25 15:48:17,428 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4311868686868687 [2022-11-25 15:48:17,428 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 683 transitions. [2022-11-25 15:48:17,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 683 transitions. [2022-11-25 15:48:17,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:48:17,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 683 transitions. [2022-11-25 15:48:17,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 170.75) internal successors, (683), 4 states have internal predecessors, (683), 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) [2022-11-25 15:48:17,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 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) [2022-11-25 15:48:17,450 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 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) [2022-11-25 15:48:17,451 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 458 flow. Second operand 4 states and 683 transitions. [2022-11-25 15:48:17,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 61 transitions, 572 flow [2022-11-25 15:48:17,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 61 transitions, 551 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-25 15:48:17,458 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 453 flow [2022-11-25 15:48:17,459 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=453, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2022-11-25 15:48:17,460 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2022-11-25 15:48:17,460 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 453 flow [2022-11-25 15:48:17,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 165.75) internal successors, (663), 4 states have internal predecessors, (663), 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) [2022-11-25 15:48:17,461 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:48:17,461 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:48:17,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-25 15:48:17,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:48:17,672 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 15:48:17,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:48:17,673 INFO L85 PathProgramCache]: Analyzing trace with hash -602987397, now seen corresponding path program 1 times [2022-11-25 15:48:17,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:48:17,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516900247] [2022-11-25 15:48:17,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:17,673 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:48:17,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:48:17,676 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:48:17,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-25 15:48:17,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:48:17,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 15:48:17,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:48:17,940 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 15:48:17,940 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 15:48:18,090 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-25 15:48:18,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-25 15:48:18,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:48:18,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:48:19,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:48:19,505 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:48:19,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1516900247] [2022-11-25 15:48:19,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1516900247] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:48:19,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:48:19,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 15:48:19,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12414720] [2022-11-25 15:48:19,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:48:19,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:48:19,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:48:19,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:48:19,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:48:27,058 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 396 [2022-11-25 15:48:27,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 453 flow. Second operand has 12 states, 12 states have (on average 152.16666666666666) internal successors, (1826), 12 states have internal predecessors, (1826), 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) [2022-11-25 15:48:27,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:48:27,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 396 [2022-11-25 15:48:27,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:48:34,993 INFO L130 PetriNetUnfolder]: 2405/4415 cut-off events. [2022-11-25 15:48:34,993 INFO L131 PetriNetUnfolder]: For 1355/1355 co-relation queries the response was YES. [2022-11-25 15:48:35,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10640 conditions, 4415 events. 2405/4415 cut-off events. For 1355/1355 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 29348 event pairs, 879 based on Foata normal form. 0/3077 useless extension candidates. Maximal degree in co-relation 10606. Up to 1147 conditions per place. [2022-11-25 15:48:35,013 INFO L137 encePairwiseOnDemand]: 384/396 looper letters, 180 selfloop transitions, 46 changer transitions 0/226 dead transitions. [2022-11-25 15:48:35,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 226 transitions, 1507 flow [2022-11-25 15:48:35,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 15:48:35,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-25 15:48:35,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3365 transitions. [2022-11-25 15:48:35,022 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40464165464165464 [2022-11-25 15:48:35,023 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3365 transitions. [2022-11-25 15:48:35,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3365 transitions. [2022-11-25 15:48:35,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:48:35,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3365 transitions. [2022-11-25 15:48:35,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 160.23809523809524) internal successors, (3365), 21 states have internal predecessors, (3365), 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) [2022-11-25 15:48:35,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 396.0) internal successors, (8712), 22 states have internal predecessors, (8712), 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) [2022-11-25 15:48:35,044 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 396.0) internal successors, (8712), 22 states have internal predecessors, (8712), 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) [2022-11-25 15:48:35,044 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 453 flow. Second operand 21 states and 3365 transitions. [2022-11-25 15:48:35,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 226 transitions, 1507 flow [2022-11-25 15:48:35,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 226 transitions, 1494 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:48:35,055 INFO L231 Difference]: Finished difference. Result has 95 places, 90 transitions, 839 flow [2022-11-25 15:48:35,056 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=839, PETRI_PLACES=95, PETRI_TRANSITIONS=90} [2022-11-25 15:48:35,056 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2022-11-25 15:48:35,056 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 90 transitions, 839 flow [2022-11-25 15:48:35,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 152.16666666666666) internal successors, (1826), 12 states have internal predecessors, (1826), 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) [2022-11-25 15:48:35,057 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:48:35,057 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:48:35,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-25 15:48:35,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:48:35,269 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 15:48:35,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:48:35,270 INFO L85 PathProgramCache]: Analyzing trace with hash 947283537, now seen corresponding path program 1 times [2022-11-25 15:48:35,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:48:35,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272702734] [2022-11-25 15:48:35,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:35,271 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:48:35,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:48:35,273 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:48:35,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-25 15:48:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:48:35,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 15:48:35,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:48:35,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:48:35,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:48:35,473 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:48:35,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [272702734] [2022-11-25 15:48:35,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [272702734] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:48:35,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:48:35,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:48:35,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124750178] [2022-11-25 15:48:35,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:48:35,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:48:35,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:48:35,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:48:35,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:48:35,753 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 396 [2022-11-25 15:48:35,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 90 transitions, 839 flow. Second operand has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 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) [2022-11-25 15:48:35,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:48:35,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 396 [2022-11-25 15:48:35,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:48:36,674 INFO L130 PetriNetUnfolder]: 2225/4115 cut-off events. [2022-11-25 15:48:36,674 INFO L131 PetriNetUnfolder]: For 5779/5779 co-relation queries the response was YES. [2022-11-25 15:48:36,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12076 conditions, 4115 events. 2225/4115 cut-off events. For 5779/5779 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 26916 event pairs, 1599 based on Foata normal form. 60/3523 useless extension candidates. Maximal degree in co-relation 12036. Up to 3820 conditions per place. [2022-11-25 15:48:36,689 INFO L137 encePairwiseOnDemand]: 390/396 looper letters, 108 selfloop transitions, 3 changer transitions 0/111 dead transitions. [2022-11-25 15:48:36,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 111 transitions, 1210 flow [2022-11-25 15:48:36,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:48:36,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:48:36,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 715 transitions. [2022-11-25 15:48:36,691 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4513888888888889 [2022-11-25 15:48:36,692 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 715 transitions. [2022-11-25 15:48:36,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 715 transitions. [2022-11-25 15:48:36,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:48:36,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 715 transitions. [2022-11-25 15:48:36,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 178.75) internal successors, (715), 4 states have internal predecessors, (715), 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) [2022-11-25 15:48:36,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 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) [2022-11-25 15:48:36,697 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 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) [2022-11-25 15:48:36,697 INFO L175 Difference]: Start difference. First operand has 95 places, 90 transitions, 839 flow. Second operand 4 states and 715 transitions. [2022-11-25 15:48:36,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 111 transitions, 1210 flow [2022-11-25 15:48:36,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 111 transitions, 1126 flow, removed 20 selfloop flow, removed 2 redundant places. [2022-11-25 15:48:36,720 INFO L231 Difference]: Finished difference. Result has 97 places, 90 transitions, 771 flow [2022-11-25 15:48:36,721 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=771, PETRI_PLACES=97, PETRI_TRANSITIONS=90} [2022-11-25 15:48:36,721 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2022-11-25 15:48:36,722 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 90 transitions, 771 flow [2022-11-25 15:48:36,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 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) [2022-11-25 15:48:36,722 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:48:36,722 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:48:36,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-25 15:48:36,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:48:36,942 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 15:48:36,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:48:36,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1500521118, now seen corresponding path program 1 times [2022-11-25 15:48:36,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:48:36,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086997190] [2022-11-25 15:48:36,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:36,942 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:48:36,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:48:36,943 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:48:36,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-25 15:48:37,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:48:37,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:48:37,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:48:37,104 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 15:48:37,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:48:37,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:48:37,241 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:48:37,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086997190] [2022-11-25 15:48:37,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086997190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:48:37,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:48:37,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:48:37,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648542962] [2022-11-25 15:48:37,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:48:37,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:48:37,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:48:37,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:48:37,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:48:37,910 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 396 [2022-11-25 15:48:37,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 90 transitions, 771 flow. Second operand has 5 states, 5 states have (on average 163.6) internal successors, (818), 5 states have internal predecessors, (818), 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) [2022-11-25 15:48:37,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:48:37,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 396 [2022-11-25 15:48:37,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:48:39,416 INFO L130 PetriNetUnfolder]: 3949/7111 cut-off events. [2022-11-25 15:48:39,416 INFO L131 PetriNetUnfolder]: For 11215/11215 co-relation queries the response was YES. [2022-11-25 15:48:39,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21916 conditions, 7111 events. 3949/7111 cut-off events. For 11215/11215 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 50468 event pairs, 1563 based on Foata normal form. 12/6507 useless extension candidates. Maximal degree in co-relation 21875. Up to 3600 conditions per place. [2022-11-25 15:48:39,451 INFO L137 encePairwiseOnDemand]: 389/396 looper letters, 99 selfloop transitions, 21 changer transitions 0/120 dead transitions. [2022-11-25 15:48:39,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 120 transitions, 1138 flow [2022-11-25 15:48:39,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:48:39,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:48:39,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 867 transitions. [2022-11-25 15:48:39,453 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43787878787878787 [2022-11-25 15:48:39,453 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 867 transitions. [2022-11-25 15:48:39,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 867 transitions. [2022-11-25 15:48:39,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:48:39,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 867 transitions. [2022-11-25 15:48:39,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 173.4) internal successors, (867), 5 states have internal predecessors, (867), 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) [2022-11-25 15:48:39,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 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) [2022-11-25 15:48:39,458 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 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) [2022-11-25 15:48:39,458 INFO L175 Difference]: Start difference. First operand has 97 places, 90 transitions, 771 flow. Second operand 5 states and 867 transitions. [2022-11-25 15:48:39,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 120 transitions, 1138 flow [2022-11-25 15:48:39,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 120 transitions, 1133 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:48:39,486 INFO L231 Difference]: Finished difference. Result has 100 places, 90 transitions, 835 flow [2022-11-25 15:48:39,486 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=835, PETRI_PLACES=100, PETRI_TRANSITIONS=90} [2022-11-25 15:48:39,486 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2022-11-25 15:48:39,486 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 90 transitions, 835 flow [2022-11-25 15:48:39,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 163.6) internal successors, (818), 5 states have internal predecessors, (818), 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) [2022-11-25 15:48:39,487 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:48:39,487 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:48:39,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-25 15:48:39,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:48:39,700 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 15:48:39,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:48:39,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1500521154, now seen corresponding path program 1 times [2022-11-25 15:48:39,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:48:39,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [77581903] [2022-11-25 15:48:39,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:39,701 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:48:39,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:48:39,702 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:48:39,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-25 15:48:39,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:48:39,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 15:48:39,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:48:39,829 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 15:48:39,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:48:39,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:48:39,937 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:48:39,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [77581903] [2022-11-25 15:48:39,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [77581903] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:48:39,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:48:39,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:48:39,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851792494] [2022-11-25 15:48:39,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:48:39,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:48:39,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:48:39,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:48:39,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:48:40,388 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 396 [2022-11-25 15:48:40,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 90 transitions, 835 flow. Second operand has 5 states, 5 states have (on average 167.6) internal successors, (838), 5 states have internal predecessors, (838), 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) [2022-11-25 15:48:40,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:48:40,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 396 [2022-11-25 15:48:40,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:48:41,678 INFO L130 PetriNetUnfolder]: 3494/6336 cut-off events. [2022-11-25 15:48:41,679 INFO L131 PetriNetUnfolder]: For 11744/11744 co-relation queries the response was YES. [2022-11-25 15:48:41,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21418 conditions, 6336 events. 3494/6336 cut-off events. For 11744/11744 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 43917 event pairs, 1166 based on Foata normal form. 320/6656 useless extension candidates. Maximal degree in co-relation 21375. Up to 3391 conditions per place. [2022-11-25 15:48:41,709 INFO L137 encePairwiseOnDemand]: 391/396 looper letters, 76 selfloop transitions, 32 changer transitions 0/108 dead transitions. [2022-11-25 15:48:41,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 108 transitions, 1147 flow [2022-11-25 15:48:41,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:48:41,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:48:41,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 870 transitions. [2022-11-25 15:48:41,712 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2022-11-25 15:48:41,712 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 870 transitions. [2022-11-25 15:48:41,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 870 transitions. [2022-11-25 15:48:41,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:48:41,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 870 transitions. [2022-11-25 15:48:41,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 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) [2022-11-25 15:48:41,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 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) [2022-11-25 15:48:41,717 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 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) [2022-11-25 15:48:41,717 INFO L175 Difference]: Start difference. First operand has 100 places, 90 transitions, 835 flow. Second operand 5 states and 870 transitions. [2022-11-25 15:48:41,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 108 transitions, 1147 flow [2022-11-25 15:48:41,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 108 transitions, 1123 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-25 15:48:41,760 INFO L231 Difference]: Finished difference. Result has 103 places, 90 transitions, 897 flow [2022-11-25 15:48:41,760 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=897, PETRI_PLACES=103, PETRI_TRANSITIONS=90} [2022-11-25 15:48:41,761 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 61 predicate places. [2022-11-25 15:48:41,761 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 90 transitions, 897 flow [2022-11-25 15:48:41,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 167.6) internal successors, (838), 5 states have internal predecessors, (838), 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) [2022-11-25 15:48:41,761 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:48:41,761 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:48:41,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-25 15:48:41,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:48:41,973 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 15:48:41,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:48:41,974 INFO L85 PathProgramCache]: Analyzing trace with hash 349842064, now seen corresponding path program 1 times [2022-11-25 15:48:41,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:48:41,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1306746777] [2022-11-25 15:48:41,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:41,975 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:48:41,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:48:41,976 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:48:41,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-25 15:48:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:48:42,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 15:48:42,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:48:42,280 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 15:48:42,280 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 15:48:42,351 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 15:48:42,352 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 15:48:42,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:42,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 15:48:42,556 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 15:48:42,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 15:48:42,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:48:42,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:48:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:48:45,259 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:48:45,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1306746777] [2022-11-25 15:48:45,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1306746777] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:48:45,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:48:45,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-25 15:48:45,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353717328] [2022-11-25 15:48:45,260 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:48:45,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 15:48:45,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:48:45,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 15:48:45,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-25 15:48:49,354 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 396 [2022-11-25 15:48:49,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 90 transitions, 897 flow. Second operand has 8 states, 8 states have (on average 152.25) internal successors, (1218), 8 states have internal predecessors, (1218), 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) [2022-11-25 15:48:49,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:48:49,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 396 [2022-11-25 15:48:49,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:49:02,703 INFO L130 PetriNetUnfolder]: 5109/9379 cut-off events. [2022-11-25 15:49:02,703 INFO L131 PetriNetUnfolder]: For 20674/20674 co-relation queries the response was YES. [2022-11-25 15:49:02,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31985 conditions, 9379 events. 5109/9379 cut-off events. For 20674/20674 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 71089 event pairs, 2461 based on Foata normal form. 480/9859 useless extension candidates. Maximal degree in co-relation 31941. Up to 3867 conditions per place. [2022-11-25 15:49:02,750 INFO L137 encePairwiseOnDemand]: 387/396 looper letters, 200 selfloop transitions, 44 changer transitions 0/244 dead transitions. [2022-11-25 15:49:02,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 244 transitions, 2162 flow [2022-11-25 15:49:02,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 15:49:02,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 15:49:02,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2578 transitions. [2022-11-25 15:49:02,757 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40688131313131315 [2022-11-25 15:49:02,757 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2578 transitions. [2022-11-25 15:49:02,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2578 transitions. [2022-11-25 15:49:02,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:49:02,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2578 transitions. [2022-11-25 15:49:02,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 161.125) internal successors, (2578), 16 states have internal predecessors, (2578), 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) [2022-11-25 15:49:02,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 396.0) internal successors, (6732), 17 states have internal predecessors, (6732), 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) [2022-11-25 15:49:02,774 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 396.0) internal successors, (6732), 17 states have internal predecessors, (6732), 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) [2022-11-25 15:49:02,774 INFO L175 Difference]: Start difference. First operand has 103 places, 90 transitions, 897 flow. Second operand 16 states and 2578 transitions. [2022-11-25 15:49:02,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 244 transitions, 2162 flow [2022-11-25 15:49:02,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 244 transitions, 2109 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 15:49:02,834 INFO L231 Difference]: Finished difference. Result has 120 places, 101 transitions, 1124 flow [2022-11-25 15:49:02,835 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1124, PETRI_PLACES=120, PETRI_TRANSITIONS=101} [2022-11-25 15:49:02,835 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2022-11-25 15:49:02,835 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 101 transitions, 1124 flow [2022-11-25 15:49:02,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 152.25) internal successors, (1218), 8 states have internal predecessors, (1218), 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) [2022-11-25 15:49:02,836 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:49:02,836 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:49:02,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:03,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:49:03,054 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 15:49:03,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:03,055 INFO L85 PathProgramCache]: Analyzing trace with hash 349716148, now seen corresponding path program 1 times [2022-11-25 15:49:03,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:49:03,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008798008] [2022-11-25 15:49:03,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:03,055 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:49:03,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:49:03,056 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:49:03,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-25 15:49:03,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:03,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 15:49:03,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:03,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:49:03,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:49:03,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:49:03,551 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:49:03,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008798008] [2022-11-25 15:49:03,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2008798008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:49:03,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:49:03,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 15:49:03,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076519594] [2022-11-25 15:49:03,551 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:49:03,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 15:49:03,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:49:03,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 15:49:03,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-25 15:49:04,729 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 396 [2022-11-25 15:49:04,730 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 101 transitions, 1124 flow. Second operand has 10 states, 10 states have (on average 164.8) internal successors, (1648), 10 states have internal predecessors, (1648), 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) [2022-11-25 15:49:04,730 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:49:04,730 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 396 [2022-11-25 15:49:04,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:49:07,476 INFO L130 PetriNetUnfolder]: 5075/9423 cut-off events. [2022-11-25 15:49:07,476 INFO L131 PetriNetUnfolder]: For 34535/34535 co-relation queries the response was YES. [2022-11-25 15:49:07,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35541 conditions, 9423 events. 5075/9423 cut-off events. For 34535/34535 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 72314 event pairs, 1889 based on Foata normal form. 402/9825 useless extension candidates. Maximal degree in co-relation 35492. Up to 3858 conditions per place. [2022-11-25 15:49:07,526 INFO L137 encePairwiseOnDemand]: 386/396 looper letters, 152 selfloop transitions, 25 changer transitions 0/177 dead transitions. [2022-11-25 15:49:07,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 177 transitions, 1959 flow [2022-11-25 15:49:07,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 15:49:07,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 15:49:07,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1559 transitions. [2022-11-25 15:49:07,529 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43742985409652074 [2022-11-25 15:49:07,529 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1559 transitions. [2022-11-25 15:49:07,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1559 transitions. [2022-11-25 15:49:07,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:49:07,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1559 transitions. [2022-11-25 15:49:07,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 173.22222222222223) internal successors, (1559), 9 states have internal predecessors, (1559), 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) [2022-11-25 15:49:07,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 396.0) internal successors, (3960), 10 states have internal predecessors, (3960), 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) [2022-11-25 15:49:07,535 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 396.0) internal successors, (3960), 10 states have internal predecessors, (3960), 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) [2022-11-25 15:49:07,536 INFO L175 Difference]: Start difference. First operand has 120 places, 101 transitions, 1124 flow. Second operand 9 states and 1559 transitions. [2022-11-25 15:49:07,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 177 transitions, 1959 flow [2022-11-25 15:49:07,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 177 transitions, 1906 flow, removed 12 selfloop flow, removed 6 redundant places. [2022-11-25 15:49:07,654 INFO L231 Difference]: Finished difference. Result has 124 places, 106 transitions, 1259 flow [2022-11-25 15:49:07,655 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1259, PETRI_PLACES=124, PETRI_TRANSITIONS=106} [2022-11-25 15:49:07,655 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2022-11-25 15:49:07,655 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 106 transitions, 1259 flow [2022-11-25 15:49:07,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 164.8) internal successors, (1648), 10 states have internal predecessors, (1648), 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) [2022-11-25 15:49:07,656 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:49:07,656 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2022-11-25 15:49:07,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:07,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:49:07,877 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 15:49:07,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:07,878 INFO L85 PathProgramCache]: Analyzing trace with hash -85662564, now seen corresponding path program 2 times [2022-11-25 15:49:07,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:49:07,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [400497611] [2022-11-25 15:49:07,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:49:07,878 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:49:07,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:49:07,880 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:49:07,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-25 15:49:07,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 15:49:07,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:49:07,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 15:49:07,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:08,059 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 15:49:08,059 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 15:49:08,125 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 15:49:08,126 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 15:49:08,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:49:08,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 15:49:08,236 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 15:49:08,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 15:49:08,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:49:08,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:49:08,311 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:49:08,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [400497611] [2022-11-25 15:49:08,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [400497611] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:49:08,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:49:08,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:49:08,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814229300] [2022-11-25 15:49:08,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:49:08,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:49:08,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:49:08,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:49:08,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:49:08,737 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 396 [2022-11-25 15:49:08,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 106 transitions, 1259 flow. Second operand has 4 states, 4 states have (on average 164.75) internal successors, (659), 4 states have internal predecessors, (659), 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) [2022-11-25 15:49:08,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:49:08,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 396 [2022-11-25 15:49:08,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:49:10,634 INFO L130 PetriNetUnfolder]: 4804/8960 cut-off events. [2022-11-25 15:49:10,634 INFO L131 PetriNetUnfolder]: For 36396/36396 co-relation queries the response was YES. [2022-11-25 15:49:10,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33714 conditions, 8960 events. 4804/8960 cut-off events. For 36396/36396 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 68356 event pairs, 1652 based on Foata normal form. 192/9152 useless extension candidates. Maximal degree in co-relation 33662. Up to 4739 conditions per place. [2022-11-25 15:49:10,697 INFO L137 encePairwiseOnDemand]: 392/396 looper letters, 109 selfloop transitions, 16 changer transitions 0/125 dead transitions. [2022-11-25 15:49:10,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 125 transitions, 1623 flow [2022-11-25 15:49:10,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:49:10,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:49:10,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 693 transitions. [2022-11-25 15:49:10,699 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4375 [2022-11-25 15:49:10,699 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 693 transitions. [2022-11-25 15:49:10,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 693 transitions. [2022-11-25 15:49:10,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:49:10,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 693 transitions. [2022-11-25 15:49:10,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 173.25) internal successors, (693), 4 states have internal predecessors, (693), 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) [2022-11-25 15:49:10,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 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) [2022-11-25 15:49:10,702 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 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) [2022-11-25 15:49:10,703 INFO L175 Difference]: Start difference. First operand has 124 places, 106 transitions, 1259 flow. Second operand 4 states and 693 transitions. [2022-11-25 15:49:10,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 125 transitions, 1623 flow [2022-11-25 15:49:10,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 125 transitions, 1618 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 15:49:10,854 INFO L231 Difference]: Finished difference. Result has 127 places, 106 transitions, 1303 flow [2022-11-25 15:49:10,855 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1303, PETRI_PLACES=127, PETRI_TRANSITIONS=106} [2022-11-25 15:49:10,855 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2022-11-25 15:49:10,855 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 106 transitions, 1303 flow [2022-11-25 15:49:10,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 164.75) internal successors, (659), 4 states have internal predecessors, (659), 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) [2022-11-25 15:49:10,856 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:49:10,856 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:49:10,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:11,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:49:11,067 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 15:49:11,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:11,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1651521008, now seen corresponding path program 1 times [2022-11-25 15:49:11,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:49:11,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355925909] [2022-11-25 15:49:11,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:11,068 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:49:11,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:49:11,070 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:49:11,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-25 15:49:11,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:11,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 15:49:11,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:11,237 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 15:49:11,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 15:49:11,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:49:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 15:49:12,377 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:49:12,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355925909] [2022-11-25 15:49:12,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1355925909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:49:12,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:49:12,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 15:49:12,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428608348] [2022-11-25 15:49:12,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:49:12,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:49:12,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:49:12,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:49:12,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:49:16,289 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 396 [2022-11-25 15:49:16,290 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 106 transitions, 1303 flow. Second operand has 12 states, 12 states have (on average 163.5) internal successors, (1962), 12 states have internal predecessors, (1962), 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) [2022-11-25 15:49:16,290 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:49:16,290 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 396 [2022-11-25 15:49:16,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:49:21,545 INFO L130 PetriNetUnfolder]: 9778/17906 cut-off events. [2022-11-25 15:49:21,545 INFO L131 PetriNetUnfolder]: For 74305/74305 co-relation queries the response was YES. [2022-11-25 15:49:21,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70200 conditions, 17906 events. 9778/17906 cut-off events. For 74305/74305 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 144611 event pairs, 524 based on Foata normal form. 594/18500 useless extension candidates. Maximal degree in co-relation 70146. Up to 4063 conditions per place. [2022-11-25 15:49:21,673 INFO L137 encePairwiseOnDemand]: 387/396 looper letters, 141 selfloop transitions, 55 changer transitions 0/196 dead transitions. [2022-11-25 15:49:21,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 196 transitions, 2233 flow [2022-11-25 15:49:21,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 15:49:21,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 15:49:21,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1561 transitions. [2022-11-25 15:49:21,677 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43799102132435463 [2022-11-25 15:49:21,677 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1561 transitions. [2022-11-25 15:49:21,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1561 transitions. [2022-11-25 15:49:21,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:49:21,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1561 transitions. [2022-11-25 15:49:21,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 173.44444444444446) internal successors, (1561), 9 states have internal predecessors, (1561), 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) [2022-11-25 15:49:21,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 396.0) internal successors, (3960), 10 states have internal predecessors, (3960), 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) [2022-11-25 15:49:21,685 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 396.0) internal successors, (3960), 10 states have internal predecessors, (3960), 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) [2022-11-25 15:49:21,685 INFO L175 Difference]: Start difference. First operand has 127 places, 106 transitions, 1303 flow. Second operand 9 states and 1561 transitions. [2022-11-25 15:49:21,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 196 transitions, 2233 flow [2022-11-25 15:49:21,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 196 transitions, 2163 flow, removed 12 selfloop flow, removed 6 redundant places. [2022-11-25 15:49:21,974 INFO L231 Difference]: Finished difference. Result has 134 places, 118 transitions, 1534 flow [2022-11-25 15:49:21,974 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1534, PETRI_PLACES=134, PETRI_TRANSITIONS=118} [2022-11-25 15:49:21,975 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2022-11-25 15:49:21,975 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 118 transitions, 1534 flow [2022-11-25 15:49:21,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.5) internal successors, (1962), 12 states have internal predecessors, (1962), 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) [2022-11-25 15:49:21,976 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:49:21,976 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:49:21,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:22,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:49:22,193 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 15:49:22,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:22,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1651520901, now seen corresponding path program 2 times [2022-11-25 15:49:22,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:49:22,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1765948061] [2022-11-25 15:49:22,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:49:22,194 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:49:22,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:49:22,195 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:49:22,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-25 15:49:22,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:49:22,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:49:22,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:49:22,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:22,421 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-25 15:49:22,422 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-25 15:49:22,488 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 15:49:22,488 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 15:49:22,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:49:22,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 15:49:22,617 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 15:49:22,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 15:49:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:49:22,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:49:25,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:49:25,713 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:49:25,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1765948061] [2022-11-25 15:49:25,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1765948061] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:49:25,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:49:25,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 15:49:25,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894917714] [2022-11-25 15:49:25,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:49:25,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:49:25,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:49:25,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:49:25,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:49:28,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:49:35,367 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 396 [2022-11-25 15:49:35,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 118 transitions, 1534 flow. Second operand has 12 states, 12 states have (on average 154.66666666666666) internal successors, (1856), 12 states have internal predecessors, (1856), 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) [2022-11-25 15:49:35,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:49:35,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 396 [2022-11-25 15:49:35,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:49:42,518 INFO L130 PetriNetUnfolder]: 9619/17729 cut-off events. [2022-11-25 15:49:42,518 INFO L131 PetriNetUnfolder]: For 83867/83867 co-relation queries the response was YES. [2022-11-25 15:49:42,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73057 conditions, 17729 events. 9619/17729 cut-off events. For 83867/83867 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 146020 event pairs, 1556 based on Foata normal form. 198/17927 useless extension candidates. Maximal degree in co-relation 73001. Up to 6394 conditions per place. [2022-11-25 15:49:42,654 INFO L137 encePairwiseOnDemand]: 388/396 looper letters, 263 selfloop transitions, 37 changer transitions 0/300 dead transitions. [2022-11-25 15:49:42,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 300 transitions, 3174 flow [2022-11-25 15:49:42,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 15:49:42,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 15:49:42,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2342 transitions. [2022-11-25 15:49:42,657 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42243867243867245 [2022-11-25 15:49:42,657 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2342 transitions. [2022-11-25 15:49:42,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2342 transitions. [2022-11-25 15:49:42,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:49:42,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2342 transitions. [2022-11-25 15:49:42,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 167.28571428571428) internal successors, (2342), 14 states have internal predecessors, (2342), 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) [2022-11-25 15:49:42,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 396.0) internal successors, (5940), 15 states have internal predecessors, (5940), 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) [2022-11-25 15:49:42,664 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 396.0) internal successors, (5940), 15 states have internal predecessors, (5940), 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) [2022-11-25 15:49:42,664 INFO L175 Difference]: Start difference. First operand has 134 places, 118 transitions, 1534 flow. Second operand 14 states and 2342 transitions. [2022-11-25 15:49:42,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 300 transitions, 3174 flow [2022-11-25 15:49:42,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 300 transitions, 3084 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-25 15:49:42,917 INFO L231 Difference]: Finished difference. Result has 147 places, 125 transitions, 1627 flow [2022-11-25 15:49:42,917 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=1451, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1627, PETRI_PLACES=147, PETRI_TRANSITIONS=125} [2022-11-25 15:49:42,918 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2022-11-25 15:49:42,918 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 125 transitions, 1627 flow [2022-11-25 15:49:42,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 154.66666666666666) internal successors, (1856), 12 states have internal predecessors, (1856), 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) [2022-11-25 15:49:42,919 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:49:42,919 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:49:42,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:43,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:49:43,129 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 15:49:43,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:43,130 INFO L85 PathProgramCache]: Analyzing trace with hash -2039794857, now seen corresponding path program 1 times [2022-11-25 15:49:43,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:49:43,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724004154] [2022-11-25 15:49:43,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:43,130 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:49:43,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:49:43,131 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:49:43,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-25 15:49:43,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:43,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 15:49:43,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:43,296 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 15:49:43,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:49:43,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:49:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:49:44,260 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:49:44,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724004154] [2022-11-25 15:49:44,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724004154] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:49:44,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:49:44,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 15:49:44,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833347232] [2022-11-25 15:49:44,260 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:49:44,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 15:49:44,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:49:44,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 15:49:44,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-25 15:49:48,235 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 396 [2022-11-25 15:49:48,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 125 transitions, 1627 flow. Second operand has 10 states, 10 states have (on average 166.0) internal successors, (1660), 10 states have internal predecessors, (1660), 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) [2022-11-25 15:49:48,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:49:48,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 396 [2022-11-25 15:49:48,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:49:57,590 INFO L130 PetriNetUnfolder]: 18303/32903 cut-off events. [2022-11-25 15:49:57,590 INFO L131 PetriNetUnfolder]: For 155214/155214 co-relation queries the response was YES. [2022-11-25 15:49:57,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148110 conditions, 32903 events. 18303/32903 cut-off events. For 155214/155214 co-relation queries the response was YES. Maximal size of possible extension queue 1204. Compared 287865 event pairs, 3915 based on Foata normal form. 2220/35123 useless extension candidates. Maximal degree in co-relation 148050. Up to 8981 conditions per place. [2022-11-25 15:49:57,853 INFO L137 encePairwiseOnDemand]: 390/396 looper letters, 183 selfloop transitions, 54 changer transitions 0/237 dead transitions. [2022-11-25 15:49:57,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 237 transitions, 3239 flow [2022-11-25 15:49:57,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 15:49:57,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 15:49:57,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1560 transitions. [2022-11-25 15:49:57,857 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4377104377104377 [2022-11-25 15:49:57,857 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1560 transitions. [2022-11-25 15:49:57,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1560 transitions. [2022-11-25 15:49:57,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:49:57,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1560 transitions. [2022-11-25 15:49:57,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 173.33333333333334) internal successors, (1560), 9 states have internal predecessors, (1560), 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) [2022-11-25 15:49:57,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 396.0) internal successors, (3960), 10 states have internal predecessors, (3960), 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) [2022-11-25 15:49:57,861 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 396.0) internal successors, (3960), 10 states have internal predecessors, (3960), 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) [2022-11-25 15:49:57,861 INFO L175 Difference]: Start difference. First operand has 147 places, 125 transitions, 1627 flow. Second operand 9 states and 1560 transitions. [2022-11-25 15:49:57,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 237 transitions, 3239 flow [2022-11-25 15:49:58,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 237 transitions, 3128 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-11-25 15:49:58,751 INFO L231 Difference]: Finished difference. Result has 154 places, 129 transitions, 1774 flow [2022-11-25 15:49:58,751 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=1584, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1774, PETRI_PLACES=154, PETRI_TRANSITIONS=129} [2022-11-25 15:49:58,751 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2022-11-25 15:49:58,751 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 129 transitions, 1774 flow [2022-11-25 15:49:58,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 166.0) internal successors, (1660), 10 states have internal predecessors, (1660), 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) [2022-11-25 15:49:58,752 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:49:58,752 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:49:58,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:58,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:49:58,953 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 15:49:58,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:58,953 INFO L85 PathProgramCache]: Analyzing trace with hash -2039794821, now seen corresponding path program 1 times [2022-11-25 15:49:58,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:49:58,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775549570] [2022-11-25 15:49:58,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:58,953 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:49:58,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:49:58,954 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:49:58,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-25 15:49:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:59,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 15:49:59,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:59,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:49:59,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:49:59,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:49:59,453 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:49:59,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775549570] [2022-11-25 15:49:59,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775549570] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:49:59,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:49:59,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 15:49:59,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12494524] [2022-11-25 15:49:59,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:49:59,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 15:49:59,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:49:59,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 15:49:59,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-25 15:50:00,530 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 396 [2022-11-25 15:50:00,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 129 transitions, 1774 flow. Second operand has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 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) [2022-11-25 15:50:00,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:50:00,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 396 [2022-11-25 15:50:00,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:50:07,871 INFO L130 PetriNetUnfolder]: 15999/28817 cut-off events. [2022-11-25 15:50:07,872 INFO L131 PetriNetUnfolder]: For 171529/171529 co-relation queries the response was YES. [2022-11-25 15:50:08,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139700 conditions, 28817 events. 15999/28817 cut-off events. For 171529/171529 co-relation queries the response was YES. Maximal size of possible extension queue 1081. Compared 249262 event pairs, 3915 based on Foata normal form. 324/29141 useless extension candidates. Maximal degree in co-relation 139635. Up to 19028 conditions per place. [2022-11-25 15:50:08,083 INFO L137 encePairwiseOnDemand]: 388/396 looper letters, 165 selfloop transitions, 31 changer transitions 0/196 dead transitions. [2022-11-25 15:50:08,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 196 transitions, 2566 flow [2022-11-25 15:50:08,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 15:50:08,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 15:50:08,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1552 transitions. [2022-11-25 15:50:08,086 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43546576879910215 [2022-11-25 15:50:08,086 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1552 transitions. [2022-11-25 15:50:08,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1552 transitions. [2022-11-25 15:50:08,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:50:08,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1552 transitions. [2022-11-25 15:50:08,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 172.44444444444446) internal successors, (1552), 9 states have internal predecessors, (1552), 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) [2022-11-25 15:50:08,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 396.0) internal successors, (3960), 10 states have internal predecessors, (3960), 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) [2022-11-25 15:50:08,090 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 396.0) internal successors, (3960), 10 states have internal predecessors, (3960), 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) [2022-11-25 15:50:08,090 INFO L175 Difference]: Start difference. First operand has 154 places, 129 transitions, 1774 flow. Second operand 9 states and 1552 transitions. [2022-11-25 15:50:08,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 196 transitions, 2566 flow [2022-11-25 15:50:10,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 196 transitions, 2417 flow, removed 17 selfloop flow, removed 6 redundant places. [2022-11-25 15:50:10,012 INFO L231 Difference]: Finished difference. Result has 157 places, 128 transitions, 1682 flow [2022-11-25 15:50:10,013 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=1610, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1682, PETRI_PLACES=157, PETRI_TRANSITIONS=128} [2022-11-25 15:50:10,013 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2022-11-25 15:50:10,013 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 128 transitions, 1682 flow [2022-11-25 15:50:10,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 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) [2022-11-25 15:50:10,014 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:50:10,014 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:50:10,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-25 15:50:10,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:50:10,218 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 15:50:10,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:50:10,218 INFO L85 PathProgramCache]: Analyzing trace with hash -338553142, now seen corresponding path program 2 times [2022-11-25 15:50:10,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:50:10,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [288687876] [2022-11-25 15:50:10,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:50:10,219 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:50:10,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:50:10,220 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:50:10,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-25 15:50:10,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:50:10,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:50:10,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:50:10,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:50:10,472 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-25 15:50:10,472 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-25 15:50:10,536 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 15:50:10,537 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 15:50:10,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:50:10,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 15:50:10,655 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 15:50:10,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 15:50:10,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:50:10,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:50:15,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:50:15,760 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:50:15,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [288687876] [2022-11-25 15:50:15,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [288687876] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:50:15,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:50:15,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 15:50:15,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339801803] [2022-11-25 15:50:15,761 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:50:15,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:50:15,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:50:15,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:50:15,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=99, Unknown=1, NotChecked=0, Total=132 [2022-11-25 15:50:17,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:50:21,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:50:25,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:50:29,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:50:33,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:50:35,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:50:37,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:50:40,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:50:40,753 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 396 [2022-11-25 15:50:40,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 128 transitions, 1682 flow. Second operand has 12 states, 12 states have (on average 148.83333333333334) internal successors, (1786), 12 states have internal predecessors, (1786), 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) [2022-11-25 15:50:40,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:50:40,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 396 [2022-11-25 15:50:40,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:50:48,904 INFO L130 PetriNetUnfolder]: 14392/26056 cut-off events. [2022-11-25 15:50:48,904 INFO L131 PetriNetUnfolder]: For 168248/168248 co-relation queries the response was YES. [2022-11-25 15:50:49,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113782 conditions, 26056 events. 14392/26056 cut-off events. For 168248/168248 co-relation queries the response was YES. Maximal size of possible extension queue 973. Compared 225101 event pairs, 3168 based on Foata normal form. 1154/27210 useless extension candidates. Maximal degree in co-relation 113718. Up to 14787 conditions per place. [2022-11-25 15:50:49,091 INFO L137 encePairwiseOnDemand]: 390/396 looper letters, 235 selfloop transitions, 37 changer transitions 0/272 dead transitions. [2022-11-25 15:50:49,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 272 transitions, 3153 flow [2022-11-25 15:50:49,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 15:50:49,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 15:50:49,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1774 transitions. [2022-11-25 15:50:49,094 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40725436179981633 [2022-11-25 15:50:49,094 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1774 transitions. [2022-11-25 15:50:49,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1774 transitions. [2022-11-25 15:50:49,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:50:49,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1774 transitions. [2022-11-25 15:50:49,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 161.27272727272728) internal successors, (1774), 11 states have internal predecessors, (1774), 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) [2022-11-25 15:50:49,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 396.0) internal successors, (4752), 12 states have internal predecessors, (4752), 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) [2022-11-25 15:50:49,099 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 396.0) internal successors, (4752), 12 states have internal predecessors, (4752), 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) [2022-11-25 15:50:49,099 INFO L175 Difference]: Start difference. First operand has 157 places, 128 transitions, 1682 flow. Second operand 11 states and 1774 transitions. [2022-11-25 15:50:49,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 272 transitions, 3153 flow [2022-11-25 15:50:49,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 272 transitions, 3124 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-11-25 15:50:49,912 INFO L231 Difference]: Finished difference. Result has 168 places, 132 transitions, 1818 flow [2022-11-25 15:50:49,912 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=1644, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1818, PETRI_PLACES=168, PETRI_TRANSITIONS=132} [2022-11-25 15:50:49,913 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2022-11-25 15:50:49,913 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 132 transitions, 1818 flow [2022-11-25 15:50:49,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 148.83333333333334) internal successors, (1786), 12 states have internal predecessors, (1786), 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) [2022-11-25 15:50:49,913 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:50:49,913 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 1, 1, 1] [2022-11-25 15:50:49,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-25 15:50:50,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:50:50,114 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 15:50:50,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:50:50,115 INFO L85 PathProgramCache]: Analyzing trace with hash -988112045, now seen corresponding path program 1 times [2022-11-25 15:50:50,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:50:50,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764462613] [2022-11-25 15:50:50,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:50:50,115 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:50:50,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:50:50,116 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:50:50,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-25 15:50:50,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:50:50,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 15:50:50,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:50:50,250 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 15:50:50,731 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:50:50,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:50:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:50:52,926 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:50:52,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764462613] [2022-11-25 15:50:52,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764462613] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:50:52,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:50:52,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-11-25 15:50:52,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977868605] [2022-11-25 15:50:52,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:50:52,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 15:50:52,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:50:52,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 15:50:52,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-11-25 15:51:09,436 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 396 [2022-11-25 15:51:09,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 132 transitions, 1818 flow. Second operand has 20 states, 20 states have (on average 163.05) internal successors, (3261), 20 states have internal predecessors, (3261), 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) [2022-11-25 15:51:09,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:51:09,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 396 [2022-11-25 15:51:09,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:51:14,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:51:16,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:51:18,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:51:20,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:51:22,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:51:24,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:51:26,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:51:27,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:51:30,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:51:53,150 INFO L130 PetriNetUnfolder]: 27091/49011 cut-off events. [2022-11-25 15:51:53,150 INFO L131 PetriNetUnfolder]: For 385518/385518 co-relation queries the response was YES. [2022-11-25 15:51:53,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226286 conditions, 49011 events. 27091/49011 cut-off events. For 385518/385518 co-relation queries the response was YES. Maximal size of possible extension queue 1288. Compared 442063 event pairs, 22164 based on Foata normal form. 38/49049 useless extension candidates. Maximal degree in co-relation 226217. Up to 7768 conditions per place. [2022-11-25 15:51:53,675 INFO L137 encePairwiseOnDemand]: 389/396 looper letters, 756 selfloop transitions, 59 changer transitions 0/815 dead transitions. [2022-11-25 15:51:53,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 815 transitions, 11038 flow [2022-11-25 15:51:53,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 15:51:53,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-25 15:51:53,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3961 transitions. [2022-11-25 15:51:53,680 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45466023875114786 [2022-11-25 15:51:53,680 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3961 transitions. [2022-11-25 15:51:53,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3961 transitions. [2022-11-25 15:51:53,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:51:53,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3961 transitions. [2022-11-25 15:51:53,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 180.04545454545453) internal successors, (3961), 22 states have internal predecessors, (3961), 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) [2022-11-25 15:51:53,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 396.0) internal successors, (9108), 23 states have internal predecessors, (9108), 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) [2022-11-25 15:51:53,692 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 396.0) internal successors, (9108), 23 states have internal predecessors, (9108), 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) [2022-11-25 15:51:53,693 INFO L175 Difference]: Start difference. First operand has 168 places, 132 transitions, 1818 flow. Second operand 22 states and 3961 transitions. [2022-11-25 15:51:53,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 815 transitions, 11038 flow [2022-11-25 15:51:55,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 815 transitions, 10579 flow, removed 36 selfloop flow, removed 7 redundant places. [2022-11-25 15:51:55,272 INFO L231 Difference]: Finished difference. Result has 193 places, 150 transitions, 2159 flow [2022-11-25 15:51:55,273 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=1714, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2159, PETRI_PLACES=193, PETRI_TRANSITIONS=150} [2022-11-25 15:51:55,273 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2022-11-25 15:51:55,273 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 150 transitions, 2159 flow [2022-11-25 15:51:55,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 163.05) internal successors, (3261), 20 states have internal predecessors, (3261), 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) [2022-11-25 15:51:55,274 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:51:55,274 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:51:55,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-25 15:51:55,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:51:55,474 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 15:51:55,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:51:55,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1905209727, now seen corresponding path program 3 times [2022-11-25 15:51:55,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:51:55,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2131922271] [2022-11-25 15:51:55,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:51:55,475 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:51:55,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:51:55,476 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:51:55,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-25 15:51:55,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 15:51:55,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:51:55,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 15:51:55,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:51:55,750 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 15:51:55,750 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 15:51:55,819 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 15:51:55,820 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 15:51:55,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:51:55,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 15:51:55,940 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 15:51:55,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 15:51:56,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 15:51:56,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:51:57,264 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 15:51:57,265 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:51:57,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2131922271] [2022-11-25 15:51:57,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2131922271] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:51:57,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:51:57,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 15:51:57,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841511245] [2022-11-25 15:51:57,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:51:57,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 15:51:57,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:51:57,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 15:51:57,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 15:52:07,867 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 396 [2022-11-25 15:52:07,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 150 transitions, 2159 flow. Second operand has 10 states, 10 states have (on average 162.2) internal successors, (1622), 10 states have internal predecessors, (1622), 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) [2022-11-25 15:52:07,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:52:07,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 396 [2022-11-25 15:52:07,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:52:23,315 INFO L130 PetriNetUnfolder]: 33591/61573 cut-off events. [2022-11-25 15:52:23,316 INFO L131 PetriNetUnfolder]: For 395147/395147 co-relation queries the response was YES. [2022-11-25 15:52:23,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245749 conditions, 61573 events. 33591/61573 cut-off events. For 395147/395147 co-relation queries the response was YES. Maximal size of possible extension queue 1626. Compared 575179 event pairs, 5952 based on Foata normal form. 4360/65933 useless extension candidates. Maximal degree in co-relation 245670. Up to 14354 conditions per place. [2022-11-25 15:52:23,974 INFO L137 encePairwiseOnDemand]: 392/396 looper letters, 251 selfloop transitions, 35 changer transitions 0/286 dead transitions. [2022-11-25 15:52:23,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 286 transitions, 3915 flow [2022-11-25 15:52:23,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 15:52:23,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 15:52:23,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1549 transitions. [2022-11-25 15:52:23,979 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4346240179573513 [2022-11-25 15:52:23,979 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1549 transitions. [2022-11-25 15:52:23,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1549 transitions. [2022-11-25 15:52:23,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:52:23,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1549 transitions. [2022-11-25 15:52:23,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 172.11111111111111) internal successors, (1549), 9 states have internal predecessors, (1549), 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) [2022-11-25 15:52:23,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 396.0) internal successors, (3960), 10 states have internal predecessors, (3960), 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) [2022-11-25 15:52:23,985 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 396.0) internal successors, (3960), 10 states have internal predecessors, (3960), 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) [2022-11-25 15:52:23,985 INFO L175 Difference]: Start difference. First operand has 193 places, 150 transitions, 2159 flow. Second operand 9 states and 1549 transitions. [2022-11-25 15:52:23,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 286 transitions, 3915 flow [2022-11-25 15:52:26,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 286 transitions, 3725 flow, removed 19 selfloop flow, removed 21 redundant places. [2022-11-25 15:52:26,181 INFO L231 Difference]: Finished difference. Result has 182 places, 151 transitions, 2033 flow [2022-11-25 15:52:26,181 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=1941, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2033, PETRI_PLACES=182, PETRI_TRANSITIONS=151} [2022-11-25 15:52:26,182 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2022-11-25 15:52:26,182 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 151 transitions, 2033 flow [2022-11-25 15:52:26,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 162.2) internal successors, (1622), 10 states have internal predecessors, (1622), 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) [2022-11-25 15:52:26,182 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:52:26,182 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 15:52:26,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-25 15:52:26,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:52:26,383 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 15:52:26,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:52:26,383 INFO L85 PathProgramCache]: Analyzing trace with hash -2026293954, now seen corresponding path program 3 times [2022-11-25 15:52:26,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:52:26,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510466207] [2022-11-25 15:52:26,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:52:26,384 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:52:26,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:52:26,385 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:52:26,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d4d9eb4-5534-49a3-9c7b-58684c1f524c/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-25 15:52:26,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 15:52:26,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:52:26,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 15:52:26,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:52:26,646 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 15:52:26,646 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 15:52:26,716 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 15:52:26,716 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 15:52:26,896 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 15:52:26,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 15:52:26,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-11-25 15:52:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:52:27,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:52:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:52:30,501 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:52:30,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510466207] [2022-11-25 15:52:30,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510466207] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:52:30,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:52:30,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-25 15:52:30,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185623676] [2022-11-25 15:52:30,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:52:30,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 15:52:30,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:52:30,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 15:52:30,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-11-25 15:52:33,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:53:01,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:53:07,070 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 396 [2022-11-25 15:53:07,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 151 transitions, 2033 flow. Second operand has 16 states, 16 states have (on average 146.375) internal successors, (2342), 16 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:07,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:53:07,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 396 [2022-11-25 15:53:07,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:53:12,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:53:34,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1]