./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 24c46cfa0dbb54d68ea1c1d9e6e82d14a582b1d00782b6decedd8126f489ee67 --- 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 17:18:12,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:18:12,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:18:12,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:18:12,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:18:12,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:18:12,666 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:18:12,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:18:12,674 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:18:12,682 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:18:12,684 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:18:12,687 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:18:12,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:18:12,691 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:18:12,699 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:18:12,700 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:18:12,704 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:18:12,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:18:12,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:18:12,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:18:12,718 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:18:12,720 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:18:12,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:18:12,725 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:18:12,729 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:18:12,732 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:18:12,733 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:18:12,735 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:18:12,736 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:18:12,737 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:18:12,737 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:18:12,738 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:18:12,741 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:18:12,742 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:18:12,744 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:18:12,744 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:18:12,745 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:18:12,746 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:18:12,746 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:18:12,748 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:18:12,749 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:18:12,750 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:18:12,793 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:18:12,794 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:18:12,794 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:18:12,794 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:18:12,795 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:18:12,795 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:18:12,796 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:18:12,797 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:18:12,797 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:18:12,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:18:12,797 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:18:12,798 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:18:12,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:18:12,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:18:12,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:18:12,799 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:18:12,799 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:18:12,799 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:18:12,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:18:12,800 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:18:12,800 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:18:12,800 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:18:12,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:18:12,801 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:18:12,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:18:12,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:18:12,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:18:12,802 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:18:12,802 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:18:12,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:18:12,802 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:18:12,803 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:18:12,803 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:18:12,803 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_9dcd9116-62e5-4a30-b706-f3888fe298e8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24c46cfa0dbb54d68ea1c1d9e6e82d14a582b1d00782b6decedd8126f489ee67 [2022-11-25 17:18:13,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:18:13,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:18:13,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:18:13,103 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:18:13,103 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:18:13,105 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2022-11-25 17:18:16,465 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:18:16,787 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:18:16,788 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2022-11-25 17:18:16,796 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/data/f5ad903e4/a7336fd451ea4186a28926ca306779a7/FLAG09de90322 [2022-11-25 17:18:16,813 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/data/f5ad903e4/a7336fd451ea4186a28926ca306779a7 [2022-11-25 17:18:16,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:18:16,818 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:18:16,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:18:16,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:18:16,837 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:18:16,838 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:18:16" (1/1) ... [2022-11-25 17:18:16,839 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16793c49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:16, skipping insertion in model container [2022-11-25 17:18:16,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:18:16" (1/1) ... [2022-11-25 17:18:16,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:18:16,875 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:18:17,040 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:17,041 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:17,042 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:17,042 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:17,044 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:17,046 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:17,050 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:17,050 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:17,051 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:17,051 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:17,052 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:17,054 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:17,056 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:17,058 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:17,059 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:17,061 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:17,071 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_9dcd9116-62e5-4a30-b706-f3888fe298e8/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c[3018,3031] [2022-11-25 17:18:17,081 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:18:17,094 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 17:18:17,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3c54134e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:17, skipping insertion in model container [2022-11-25 17:18:17,095 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:18:17,096 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 17:18:17,098 INFO L158 Benchmark]: Toolchain (without parser) took 279.66ms. Allocated memory is still 195.0MB. Free memory was 161.5MB in the beginning and 151.1MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 17:18:17,099 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 195.0MB. Free memory is still 166.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 17:18:17,100 INFO L158 Benchmark]: CACSL2BoogieTranslator took 276.69ms. Allocated memory is still 195.0MB. Free memory was 161.5MB in the beginning and 151.1MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 17:18:17,101 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 195.0MB. Free memory is still 166.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 276.69ms. Allocated memory is still 195.0MB. Free memory was 161.5MB in the beginning and 151.1MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 129]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 24c46cfa0dbb54d68ea1c1d9e6e82d14a582b1d00782b6decedd8126f489ee67 --- 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 17:18:19,796 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:18:19,799 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:18:19,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:18:19,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:18:19,854 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:18:19,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:18:19,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:18:19,863 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:18:19,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:18:19,869 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:18:19,873 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:18:19,875 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:18:19,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:18:19,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:18:19,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:18:19,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:18:19,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:18:19,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:18:19,897 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:18:19,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:18:19,905 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:18:19,909 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:18:19,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:18:19,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:18:19,924 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:18:19,924 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:18:19,926 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:18:19,931 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:18:19,932 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:18:19,932 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:18:19,934 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:18:19,936 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:18:19,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:18:19,951 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:18:19,951 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:18:19,952 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:18:19,952 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:18:19,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:18:19,953 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:18:19,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:18:19,959 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-25 17:18:20,013 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:18:20,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:18:20,015 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:18:20,016 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:18:20,017 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:18:20,017 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:18:20,018 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:18:20,018 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:18:20,018 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:18:20,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:18:20,020 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:18:20,020 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:18:20,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:18:20,021 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:18:20,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:18:20,021 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:18:20,022 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:18:20,022 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:18:20,022 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:18:20,023 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:18:20,023 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 17:18:20,023 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 17:18:20,023 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:18:20,024 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:18:20,024 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:18:20,024 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:18:20,024 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:18:20,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:18:20,025 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:18:20,025 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:18:20,026 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-25 17:18:20,026 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 17:18:20,026 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:18:20,027 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:18:20,027 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:18:20,027 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-25 17:18:20,027 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_9dcd9116-62e5-4a30-b706-f3888fe298e8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24c46cfa0dbb54d68ea1c1d9e6e82d14a582b1d00782b6decedd8126f489ee67 [2022-11-25 17:18:20,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:18:20,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:18:20,468 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:18:20,470 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:18:20,471 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:18:20,473 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2022-11-25 17:18:23,811 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:18:24,073 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:18:24,074 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2022-11-25 17:18:24,083 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/data/a7e89c2ee/099138b1e89841879de3aa69c755d9bb/FLAG0d702ec5d [2022-11-25 17:18:24,097 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/data/a7e89c2ee/099138b1e89841879de3aa69c755d9bb [2022-11-25 17:18:24,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:18:24,102 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:18:24,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:18:24,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:18:24,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:18:24,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:18:24" (1/1) ... [2022-11-25 17:18:24,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c7b00cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:24, skipping insertion in model container [2022-11-25 17:18:24,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:18:24" (1/1) ... [2022-11-25 17:18:24,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:18:24,143 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:18:24,442 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:24,446 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:24,448 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:24,450 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:24,454 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:24,457 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:24,461 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:24,463 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:24,464 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:24,464 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:24,466 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:24,468 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:24,480 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:24,483 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:24,486 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:24,489 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:24,507 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_9dcd9116-62e5-4a30-b706-f3888fe298e8/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c[3018,3031] [2022-11-25 17:18:24,530 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:18:24,560 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 17:18:24,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:18:24,573 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:24,574 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:24,575 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:24,575 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:24,576 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:24,578 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:24,579 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:24,579 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:24,580 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:24,580 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:24,581 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:24,583 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:24,584 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:24,585 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:24,586 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:24,588 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:24,593 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_9dcd9116-62e5-4a30-b706-f3888fe298e8/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c[3018,3031] [2022-11-25 17:18:24,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:18:24,604 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:18:24,620 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:24,621 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:24,622 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:24,622 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:24,623 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:24,625 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:24,626 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:24,627 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:24,627 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:24,628 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:24,629 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:24,630 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:24,632 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:24,633 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:24,634 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:18:24,635 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:18:24,640 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_9dcd9116-62e5-4a30-b706-f3888fe298e8/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c[3018,3031] [2022-11-25 17:18:24,644 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:18:24,665 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:18:24,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:24 WrapperNode [2022-11-25 17:18:24,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:18:24,667 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:18:24,668 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:18:24,668 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:18:24,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:24" (1/1) ... [2022-11-25 17:18:24,692 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:24" (1/1) ... [2022-11-25 17:18:24,720 INFO L138 Inliner]: procedures = 28, calls = 63, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 135 [2022-11-25 17:18:24,720 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:18:24,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:18:24,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:18:24,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:18:24,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:24" (1/1) ... [2022-11-25 17:18:24,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:24" (1/1) ... [2022-11-25 17:18:24,737 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:24" (1/1) ... [2022-11-25 17:18:24,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:24" (1/1) ... [2022-11-25 17:18:24,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:24" (1/1) ... [2022-11-25 17:18:24,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:24" (1/1) ... [2022-11-25 17:18:24,769 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:24" (1/1) ... [2022-11-25 17:18:24,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:24" (1/1) ... [2022-11-25 17:18:24,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:18:24,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:18:24,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:18:24,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:18:24,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:24" (1/1) ... [2022-11-25 17:18:24,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:18:24,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:18:24,829 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:18:24,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:18:24,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:18:24,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 17:18:24,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:18:24,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 17:18:24,887 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:18:24,887 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:18:24,888 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:18:24,888 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:18:24,888 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 17:18:24,889 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 17:18:24,889 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-25 17:18:24,889 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-25 17:18:24,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:18:24,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:18:24,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:18:24,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:18:24,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:18:24,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:18:24,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 17:18:24,892 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 17:18:25,124 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:18:25,126 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:18:25,892 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:18:26,121 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:18:26,121 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 17:18:26,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:18:26 BoogieIcfgContainer [2022-11-25 17:18:26,125 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:18:26,127 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:18:26,127 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:18:26,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:18:26,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:18:24" (1/3) ... [2022-11-25 17:18:26,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@169ac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:18:26, skipping insertion in model container [2022-11-25 17:18:26,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:24" (2/3) ... [2022-11-25 17:18:26,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@169ac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:18:26, skipping insertion in model container [2022-11-25 17:18:26,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:18:26" (3/3) ... [2022-11-25 17:18:26,140 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-inc.wvr.c [2022-11-25 17:18:26,161 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:18:26,162 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2022-11-25 17:18:26,162 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:18:26,299 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-25 17:18:26,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 210 transitions, 452 flow [2022-11-25 17:18:26,416 INFO L130 PetriNetUnfolder]: 12/206 cut-off events. [2022-11-25 17:18:26,416 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-25 17:18:26,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 206 events. 12/206 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 278 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 161. Up to 2 conditions per place. [2022-11-25 17:18:26,424 INFO L82 GeneralOperation]: Start removeDead. Operand has 211 places, 210 transitions, 452 flow [2022-11-25 17:18:26,430 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 201 transitions, 426 flow [2022-11-25 17:18:26,434 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:18:26,456 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 201 transitions, 426 flow [2022-11-25 17:18:26,459 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 201 transitions, 426 flow [2022-11-25 17:18:26,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 201 transitions, 426 flow [2022-11-25 17:18:26,518 INFO L130 PetriNetUnfolder]: 12/201 cut-off events. [2022-11-25 17:18:26,519 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-25 17:18:26,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 201 events. 12/201 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 276 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 161. Up to 2 conditions per place. [2022-11-25 17:18:26,525 INFO L119 LiptonReduction]: Number of co-enabled transitions 4948 [2022-11-25 17:19:02,020 WARN L233 SmtUtils]: Spent 6.41s on a formula simplification. DAG size of input: 123 DAG size of output: 122 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 17:19:12,558 WARN L233 SmtUtils]: Spent 8.48s on a formula simplification. DAG size of input: 135 DAG size of output: 132 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 17:19:13,281 INFO L134 LiptonReduction]: Checked pairs total: 8745 [2022-11-25 17:19:13,281 INFO L136 LiptonReduction]: Total number of compositions: 194 [2022-11-25 17:19:13,308 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:19:13,320 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;@1facde5d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:19:13,321 INFO L358 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2022-11-25 17:19:13,333 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 17:19:13,334 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:19:13,334 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:13,335 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:19:13,336 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-25 17:19:13,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:13,346 INFO L85 PathProgramCache]: Analyzing trace with hash 27258, now seen corresponding path program 1 times [2022-11-25 17:19:13,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:19:13,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [994321180] [2022-11-25 17:19:13,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:13,372 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 17:19:13,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:19:13,380 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:13,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:13,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:13,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:19:13,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:13,907 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-25 17:19:13,909 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-25 17:19:13,976 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 17:19:13,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:19:13,977 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:19:13,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [994321180] [2022-11-25 17:19:13,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [994321180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:19:13,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:19:13,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:19:13,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98392893] [2022-11-25 17:19:13,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:13,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:19:13,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:19:14,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:19:14,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:19:14,424 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 404 [2022-11-25 17:19:14,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 160 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 17:19:14,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:14,429 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 404 [2022-11-25 17:19:14,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:16,823 INFO L130 PetriNetUnfolder]: 9120/11749 cut-off events. [2022-11-25 17:19:16,824 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2022-11-25 17:19:16,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23999 conditions, 11749 events. 9120/11749 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 56206 event pairs, 6418 based on Foata normal form. 0/5115 useless extension candidates. Maximal degree in co-relation 21660. Up to 11725 conditions per place. [2022-11-25 17:19:16,930 INFO L137 encePairwiseOnDemand]: 393/404 looper letters, 52 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2022-11-25 17:19:16,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 58 transitions, 246 flow [2022-11-25 17:19:16,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:19:16,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:19:16,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 579 transitions. [2022-11-25 17:19:16,946 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4777227722772277 [2022-11-25 17:19:16,947 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 579 transitions. [2022-11-25 17:19:16,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 579 transitions. [2022-11-25 17:19:16,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:16,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 579 transitions. [2022-11-25 17:19:16,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 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 17:19:16,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 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 17:19:16,965 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 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 17:19:16,968 INFO L175 Difference]: Start difference. First operand has 77 places, 68 transitions, 160 flow. Second operand 3 states and 579 transitions. [2022-11-25 17:19:16,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 58 transitions, 246 flow [2022-11-25 17:19:16,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 58 transitions, 230 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-25 17:19:16,994 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 126 flow [2022-11-25 17:19:16,996 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2022-11-25 17:19:17,000 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -16 predicate places. [2022-11-25 17:19:17,000 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 126 flow [2022-11-25 17:19:17,001 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 17:19:17,001 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:17,001 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:19:17,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:17,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:17,216 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-25 17:19:17,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:17,217 INFO L85 PathProgramCache]: Analyzing trace with hash 27345, now seen corresponding path program 1 times [2022-11-25 17:19:17,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:19:17,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [622182080] [2022-11-25 17:19:17,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:17,219 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 17:19:17,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:19:17,221 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:17,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:17,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:19:17,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:17,433 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 17:19:17,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:19:17,434 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:19:17,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [622182080] [2022-11-25 17:19:17,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [622182080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:19:17,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:19:17,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:19:17,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050508887] [2022-11-25 17:19:17,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:17,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:19:17,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:19:17,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:19:17,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:19:17,508 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 404 [2022-11-25 17:19:17,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 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 17:19:17,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:17,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 404 [2022-11-25 17:19:17,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:19,507 INFO L130 PetriNetUnfolder]: 9120/11751 cut-off events. [2022-11-25 17:19:19,508 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-25 17:19:19,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23705 conditions, 11751 events. 9120/11751 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 56183 event pairs, 6418 based on Foata normal form. 0/5116 useless extension candidates. Maximal degree in co-relation 23699. Up to 11726 conditions per place. [2022-11-25 17:19:19,594 INFO L137 encePairwiseOnDemand]: 399/404 looper letters, 53 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2022-11-25 17:19:19,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 60 transitions, 240 flow [2022-11-25 17:19:19,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:19:19,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:19:19,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 586 transitions. [2022-11-25 17:19:19,598 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4834983498349835 [2022-11-25 17:19:19,599 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 586 transitions. [2022-11-25 17:19:19,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 586 transitions. [2022-11-25 17:19:19,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:19,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 586 transitions. [2022-11-25 17:19:19,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 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 17:19:19,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 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 17:19:19,609 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 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 17:19:19,609 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 126 flow. Second operand 3 states and 586 transitions. [2022-11-25 17:19:19,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 60 transitions, 240 flow [2022-11-25 17:19:19,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 60 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:19:19,614 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 141 flow [2022-11-25 17:19:19,614 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2022-11-25 17:19:19,615 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -14 predicate places. [2022-11-25 17:19:19,616 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 141 flow [2022-11-25 17:19:19,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 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 17:19:19,622 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:19,622 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:19:19,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:19,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:19,837 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-25 17:19:19,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:19,837 INFO L85 PathProgramCache]: Analyzing trace with hash 27259, now seen corresponding path program 1 times [2022-11-25 17:19:19,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:19:19,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629815766] [2022-11-25 17:19:19,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:19,839 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 17:19:19,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:19:19,843 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:19,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:19,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:19:19,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:20,239 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-25 17:19:20,240 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-25 17:19:20,321 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 17:19:20,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:19:20,321 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:19:20,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629815766] [2022-11-25 17:19:20,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629815766] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:19:20,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:19:20,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:19:20,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330131934] [2022-11-25 17:19:20,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:20,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:19:20,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:19:20,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:19:20,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:19:20,676 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 404 [2022-11-25 17:19:20,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 141 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 17:19:20,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:20,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 404 [2022-11-25 17:19:20,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:22,925 INFO L130 PetriNetUnfolder]: 9120/11750 cut-off events. [2022-11-25 17:19:22,926 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-25 17:19:22,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23711 conditions, 11750 events. 9120/11750 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 56079 event pairs, 6418 based on Foata normal form. 1/5118 useless extension candidates. Maximal degree in co-relation 23703. Up to 11726 conditions per place. [2022-11-25 17:19:23,009 INFO L137 encePairwiseOnDemand]: 401/404 looper letters, 52 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2022-11-25 17:19:23,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 59 transitions, 249 flow [2022-11-25 17:19:23,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:19:23,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:19:23,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 565 transitions. [2022-11-25 17:19:23,013 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4661716171617162 [2022-11-25 17:19:23,013 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 565 transitions. [2022-11-25 17:19:23,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 565 transitions. [2022-11-25 17:19:23,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:23,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 565 transitions. [2022-11-25 17:19:23,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 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 17:19:23,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 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 17:19:23,022 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 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 17:19:23,022 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 141 flow. Second operand 3 states and 565 transitions. [2022-11-25 17:19:23,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 59 transitions, 249 flow [2022-11-25 17:19:23,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 59 transitions, 245 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 17:19:23,027 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 145 flow [2022-11-25 17:19:23,028 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2022-11-25 17:19:23,029 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -12 predicate places. [2022-11-25 17:19:23,030 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 145 flow [2022-11-25 17:19:23,030 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 17:19:23,031 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:23,031 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:19:23,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:23,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:23,250 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-25 17:19:23,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:23,251 INFO L85 PathProgramCache]: Analyzing trace with hash 847698, now seen corresponding path program 1 times [2022-11-25 17:19:23,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:19:23,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404438963] [2022-11-25 17:19:23,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:23,254 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 17:19:23,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:19:23,256 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:23,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:23,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 17:19:23,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:23,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:19:23,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:19:23,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:19:23,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:19:23,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:19:23,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:19:23,678 INFO L321 Elim1Store]: treesize reduction 48, result has 43.5 percent of original size [2022-11-25 17:19:23,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 44 [2022-11-25 17:19:23,735 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-11-25 17:19:23,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2022-11-25 17:19:23,900 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 17:19:23,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:19:23,901 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:19:23,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404438963] [2022-11-25 17:19:23,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404438963] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:19:23,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:19:23,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:19:23,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691781149] [2022-11-25 17:19:23,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:23,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:19:23,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:19:23,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:19:23,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:19:24,266 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 404 [2022-11-25 17:19:24,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 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 17:19:24,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:24,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 404 [2022-11-25 17:19:24,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:25,931 INFO L130 PetriNetUnfolder]: 7644/9913 cut-off events. [2022-11-25 17:19:25,931 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-25 17:19:25,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20039 conditions, 9913 events. 7644/9913 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 46668 event pairs, 5350 based on Foata normal form. 0/4433 useless extension candidates. Maximal degree in co-relation 20029. Up to 9889 conditions per place. [2022-11-25 17:19:26,008 INFO L137 encePairwiseOnDemand]: 401/404 looper letters, 51 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2022-11-25 17:19:26,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 57 transitions, 243 flow [2022-11-25 17:19:26,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:19:26,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:19:26,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 575 transitions. [2022-11-25 17:19:26,011 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4744224422442244 [2022-11-25 17:19:26,012 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 575 transitions. [2022-11-25 17:19:26,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 575 transitions. [2022-11-25 17:19:26,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:26,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 575 transitions. [2022-11-25 17:19:26,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 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 17:19:26,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 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 17:19:26,019 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 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 17:19:26,019 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 145 flow. Second operand 3 states and 575 transitions. [2022-11-25 17:19:26,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 57 transitions, 243 flow [2022-11-25 17:19:26,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 57 transitions, 239 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:19:26,024 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 137 flow [2022-11-25 17:19:26,024 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2022-11-25 17:19:26,026 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -14 predicate places. [2022-11-25 17:19:26,027 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 137 flow [2022-11-25 17:19:26,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 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 17:19:26,030 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:26,031 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:19:26,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:26,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:26,251 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-25 17:19:26,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:26,252 INFO L85 PathProgramCache]: Analyzing trace with hash 847612, now seen corresponding path program 1 times [2022-11-25 17:19:26,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:19:26,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [427828114] [2022-11-25 17:19:26,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:26,253 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 17:19:26,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:19:26,259 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:26,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:26,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:19:26,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:26,659 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-25 17:19:26,660 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-25 17:19:26,777 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 17:19:26,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:27,116 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 17:19:27,116 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:19:27,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [427828114] [2022-11-25 17:19:27,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [427828114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:19:27,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:19:27,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-25 17:19:27,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784192336] [2022-11-25 17:19:27,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:19:27,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:19:27,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:19:27,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:19:27,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:19:28,642 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 404 [2022-11-25 17:19:28,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 137 flow. Second operand has 6 states, 6 states have (on average 168.0) internal successors, (1008), 6 states have internal predecessors, (1008), 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 17:19:28,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:28,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 404 [2022-11-25 17:19:28,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:32,039 INFO L130 PetriNetUnfolder]: 15291/19829 cut-off events. [2022-11-25 17:19:32,039 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-11-25 17:19:32,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40078 conditions, 19829 events. 15291/19829 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 1219. Compared 102169 event pairs, 10700 based on Foata normal form. 3/8940 useless extension candidates. Maximal degree in co-relation 40068. Up to 9890 conditions per place. [2022-11-25 17:19:32,213 INFO L137 encePairwiseOnDemand]: 399/404 looper letters, 98 selfloop transitions, 9 changer transitions 0/112 dead transitions. [2022-11-25 17:19:32,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 112 transitions, 487 flow [2022-11-25 17:19:32,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:19:32,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:19:32,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1112 transitions. [2022-11-25 17:19:32,220 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45874587458745875 [2022-11-25 17:19:32,220 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1112 transitions. [2022-11-25 17:19:32,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1112 transitions. [2022-11-25 17:19:32,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:32,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1112 transitions. [2022-11-25 17:19:32,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 185.33333333333334) internal successors, (1112), 6 states have internal predecessors, (1112), 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 17:19:32,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 404.0) internal successors, (2828), 7 states have internal predecessors, (2828), 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 17:19:32,234 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 404.0) internal successors, (2828), 7 states have internal predecessors, (2828), 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 17:19:32,235 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 137 flow. Second operand 6 states and 1112 transitions. [2022-11-25 17:19:32,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 112 transitions, 487 flow [2022-11-25 17:19:32,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 112 transitions, 486 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:19:32,239 INFO L231 Difference]: Finished difference. Result has 71 places, 64 transitions, 214 flow [2022-11-25 17:19:32,240 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=71, PETRI_TRANSITIONS=64} [2022-11-25 17:19:32,241 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -6 predicate places. [2022-11-25 17:19:32,241 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 64 transitions, 214 flow [2022-11-25 17:19:32,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 168.0) internal successors, (1008), 6 states have internal predecessors, (1008), 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 17:19:32,242 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:32,242 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:19:32,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:32,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:32,456 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-25 17:19:32,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:32,458 INFO L85 PathProgramCache]: Analyzing trace with hash 847696, now seen corresponding path program 1 times [2022-11-25 17:19:32,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:19:32,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [611559842] [2022-11-25 17:19:32,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:32,459 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 17:19:32,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:19:32,460 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:32,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:32,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:32,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:19:32,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:32,777 INFO L321 Elim1Store]: treesize reduction 214, result has 11.9 percent of original size [2022-11-25 17:19:32,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 69 [2022-11-25 17:19:33,003 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 17:19:33,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:19:33,004 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:19:33,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [611559842] [2022-11-25 17:19:33,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [611559842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:19:33,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:19:33,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:19:33,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520867622] [2022-11-25 17:19:33,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:33,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:19:33,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:19:33,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:19:33,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:19:33,427 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 404 [2022-11-25 17:19:33,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 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 17:19:33,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:33,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 404 [2022-11-25 17:19:33,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:35,349 INFO L130 PetriNetUnfolder]: 12337/16153 cut-off events. [2022-11-25 17:19:35,349 INFO L131 PetriNetUnfolder]: For 68/68 co-relation queries the response was YES. [2022-11-25 17:19:35,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32746 conditions, 16153 events. 12337/16153 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 996. Compared 82490 event pairs, 8564 based on Foata normal form. 0/7501 useless extension candidates. Maximal degree in co-relation 32731. Up to 16105 conditions per place. [2022-11-25 17:19:35,484 INFO L137 encePairwiseOnDemand]: 401/404 looper letters, 54 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2022-11-25 17:19:35,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 60 transitions, 298 flow [2022-11-25 17:19:35,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:19:35,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:19:35,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 567 transitions. [2022-11-25 17:19:35,489 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46782178217821785 [2022-11-25 17:19:35,489 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 567 transitions. [2022-11-25 17:19:35,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 567 transitions. [2022-11-25 17:19:35,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:35,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 567 transitions. [2022-11-25 17:19:35,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 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 17:19:35,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 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 17:19:35,499 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 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 17:19:35,499 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 214 flow. Second operand 3 states and 567 transitions. [2022-11-25 17:19:35,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 60 transitions, 298 flow [2022-11-25 17:19:35,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 60 transitions, 286 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-11-25 17:19:35,504 INFO L231 Difference]: Finished difference. Result has 70 places, 60 transitions, 178 flow [2022-11-25 17:19:35,505 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=70, PETRI_TRANSITIONS=60} [2022-11-25 17:19:35,509 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -7 predicate places. [2022-11-25 17:19:35,509 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 60 transitions, 178 flow [2022-11-25 17:19:35,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 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 17:19:35,510 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:35,510 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:19:35,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:35,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:35,733 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-25 17:19:35,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:35,734 INFO L85 PathProgramCache]: Analyzing trace with hash 814656977, now seen corresponding path program 1 times [2022-11-25 17:19:35,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:19:35,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022113122] [2022-11-25 17:19:35,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:35,735 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 17:19:35,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:19:35,739 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:35,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:35,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 17:19:35,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:36,060 INFO L321 Elim1Store]: treesize reduction 194, result has 13.0 percent of original size [2022-11-25 17:19:36,060 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 7 case distinctions, treesize of input 49 treesize of output 62 [2022-11-25 17:19:36,381 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 17:19:36,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:19:36,382 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:19:36,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022113122] [2022-11-25 17:19:36,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022113122] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:19:36,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:19:36,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:19:36,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670660325] [2022-11-25 17:19:36,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:36,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:19:36,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:19:36,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:19:36,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:19:36,797 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 404 [2022-11-25 17:19:36,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 60 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 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 17:19:36,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:36,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 404 [2022-11-25 17:19:36,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:38,369 INFO L130 PetriNetUnfolder]: 11953/15637 cut-off events. [2022-11-25 17:19:38,369 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-11-25 17:19:38,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31710 conditions, 15637 events. 11953/15637 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 995. Compared 79498 event pairs, 8298 based on Foata normal form. 0/7327 useless extension candidates. Maximal degree in co-relation 31694. Up to 15589 conditions per place. [2022-11-25 17:19:38,503 INFO L137 encePairwiseOnDemand]: 401/404 looper letters, 52 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2022-11-25 17:19:38,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 58 transitions, 280 flow [2022-11-25 17:19:38,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:19:38,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:19:38,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 565 transitions. [2022-11-25 17:19:38,507 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4661716171617162 [2022-11-25 17:19:38,507 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 565 transitions. [2022-11-25 17:19:38,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 565 transitions. [2022-11-25 17:19:38,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:38,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 565 transitions. [2022-11-25 17:19:38,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 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 17:19:38,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 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 17:19:38,515 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 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 17:19:38,515 INFO L175 Difference]: Start difference. First operand has 70 places, 60 transitions, 178 flow. Second operand 3 states and 565 transitions. [2022-11-25 17:19:38,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 58 transitions, 280 flow [2022-11-25 17:19:38,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 58 transitions, 279 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:19:38,519 INFO L231 Difference]: Finished difference. Result has 69 places, 58 transitions, 175 flow [2022-11-25 17:19:38,519 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2022-11-25 17:19:38,520 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -8 predicate places. [2022-11-25 17:19:38,520 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 175 flow [2022-11-25 17:19:38,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 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 17:19:38,521 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:38,521 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:19:38,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:38,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:38,736 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-25 17:19:38,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:38,736 INFO L85 PathProgramCache]: Analyzing trace with hash 814656978, now seen corresponding path program 1 times [2022-11-25 17:19:38,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:19:38,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039806827] [2022-11-25 17:19:38,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:38,737 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 17:19:38,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:19:38,738 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:38,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:38,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:38,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 17:19:38,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:38,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:19:38,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:19:38,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:19:38,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:19:38,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:19:39,198 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-11-25 17:19:39,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-11-25 17:19:39,242 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-25 17:19:39,243 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 31 treesize of output 27 [2022-11-25 17:19:39,439 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 17:19:39,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:19:39,440 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:19:39,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039806827] [2022-11-25 17:19:39,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039806827] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:19:39,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:19:39,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:19:39,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799990839] [2022-11-25 17:19:39,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:39,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:19:39,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:19:39,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:19:39,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:19:39,746 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 404 [2022-11-25 17:19:39,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 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 17:19:39,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:39,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 404 [2022-11-25 17:19:39,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:41,453 INFO L130 PetriNetUnfolder]: 11569/15121 cut-off events. [2022-11-25 17:19:41,453 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-11-25 17:19:41,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30679 conditions, 15121 events. 11569/15121 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 994. Compared 76703 event pairs, 8032 based on Foata normal form. 0/7153 useless extension candidates. Maximal degree in co-relation 30662. Up to 15073 conditions per place. [2022-11-25 17:19:41,524 INFO L137 encePairwiseOnDemand]: 401/404 looper letters, 50 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2022-11-25 17:19:41,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 56 transitions, 273 flow [2022-11-25 17:19:41,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:19:41,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:19:41,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 569 transitions. [2022-11-25 17:19:41,527 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46947194719471946 [2022-11-25 17:19:41,527 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 569 transitions. [2022-11-25 17:19:41,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 569 transitions. [2022-11-25 17:19:41,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:41,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 569 transitions. [2022-11-25 17:19:41,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 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 17:19:41,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 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 17:19:41,533 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 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 17:19:41,533 INFO L175 Difference]: Start difference. First operand has 69 places, 58 transitions, 175 flow. Second operand 3 states and 569 transitions. [2022-11-25 17:19:41,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 56 transitions, 273 flow [2022-11-25 17:19:41,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 56 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:19:41,535 INFO L231 Difference]: Finished difference. Result has 68 places, 56 transitions, 172 flow [2022-11-25 17:19:41,536 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=68, PETRI_TRANSITIONS=56} [2022-11-25 17:19:41,536 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -9 predicate places. [2022-11-25 17:19:41,537 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 56 transitions, 172 flow [2022-11-25 17:19:41,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 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 17:19:41,537 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:41,538 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:19:41,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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)] Ended with exit code 0 [2022-11-25 17:19:41,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:41,752 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-25 17:19:41,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:41,752 INFO L85 PathProgramCache]: Analyzing trace with hash 814656757, now seen corresponding path program 1 times [2022-11-25 17:19:41,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:19:41,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752547867] [2022-11-25 17:19:41,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:41,753 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 17:19:41,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:19:41,754 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:41,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:41,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:41,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:19:41,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:42,073 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-25 17:19:42,074 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-25 17:19:42,133 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 17:19:42,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:19:42,133 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:19:42,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752547867] [2022-11-25 17:19:42,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752547867] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:19:42,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:19:42,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:19:42,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540734064] [2022-11-25 17:19:42,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:42,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:19:42,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:19:42,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:19:42,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:19:42,363 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 404 [2022-11-25 17:19:42,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 56 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 166.25) internal successors, (665), 4 states have internal predecessors, (665), 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 17:19:42,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:42,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 404 [2022-11-25 17:19:42,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:43,282 INFO L130 PetriNetUnfolder]: 6411/8489 cut-off events. [2022-11-25 17:19:43,282 INFO L131 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-11-25 17:19:43,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17244 conditions, 8489 events. 6411/8489 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 39986 event pairs, 4360 based on Foata normal form. 0/4655 useless extension candidates. Maximal degree in co-relation 17226. Up to 8446 conditions per place. [2022-11-25 17:19:43,334 INFO L137 encePairwiseOnDemand]: 397/404 looper letters, 44 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2022-11-25 17:19:43,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 51 transitions, 258 flow [2022-11-25 17:19:43,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:19:43,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:19:43,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 707 transitions. [2022-11-25 17:19:43,337 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4375 [2022-11-25 17:19:43,338 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 707 transitions. [2022-11-25 17:19:43,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 707 transitions. [2022-11-25 17:19:43,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:43,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 707 transitions. [2022-11-25 17:19:43,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 176.75) internal successors, (707), 4 states have internal predecessors, (707), 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 17:19:43,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 404.0) internal successors, (2020), 5 states have internal predecessors, (2020), 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 17:19:43,345 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 404.0) internal successors, (2020), 5 states have internal predecessors, (2020), 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 17:19:43,345 INFO L175 Difference]: Start difference. First operand has 68 places, 56 transitions, 172 flow. Second operand 4 states and 707 transitions. [2022-11-25 17:19:43,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 51 transitions, 258 flow [2022-11-25 17:19:43,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 51 transitions, 257 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:19:43,347 INFO L231 Difference]: Finished difference. Result has 65 places, 51 transitions, 169 flow [2022-11-25 17:19:43,347 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=169, PETRI_PLACES=65, PETRI_TRANSITIONS=51} [2022-11-25 17:19:43,348 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -12 predicate places. [2022-11-25 17:19:43,348 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 51 transitions, 169 flow [2022-11-25 17:19:43,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 166.25) internal successors, (665), 4 states have internal predecessors, (665), 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 17:19:43,349 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:43,349 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:19:43,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:43,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:43,549 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-25 17:19:43,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:43,550 INFO L85 PathProgramCache]: Analyzing trace with hash 814656758, now seen corresponding path program 1 times [2022-11-25 17:19:43,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:19:43,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788669259] [2022-11-25 17:19:43,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:43,551 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 17:19:43,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:19:43,552 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:43,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:43,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:19:43,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:43,753 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 17:19:43,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:43,898 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 25 treesize of output 21 [2022-11-25 17:19:43,979 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 17:19:43,980 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:19:43,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [788669259] [2022-11-25 17:19:43,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [788669259] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:19:43,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:19:43,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-25 17:19:43,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200348830] [2022-11-25 17:19:43,980 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:19:43,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:19:43,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:19:43,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:19:43,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:19:45,864 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 404 [2022-11-25 17:19:45,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 51 transitions, 169 flow. Second operand has 8 states, 8 states have (on average 167.25) internal successors, (1338), 8 states have internal predecessors, (1338), 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 17:19:45,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:45,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 404 [2022-11-25 17:19:45,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:47,263 INFO L130 PetriNetUnfolder]: 6411/8483 cut-off events. [2022-11-25 17:19:47,263 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2022-11-25 17:19:47,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17243 conditions, 8483 events. 6411/8483 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 39897 event pairs, 4360 based on Foata normal form. 0/4704 useless extension candidates. Maximal degree in co-relation 17224. Up to 4224 conditions per place. [2022-11-25 17:19:47,320 INFO L137 encePairwiseOnDemand]: 399/404 looper letters, 80 selfloop transitions, 7 changer transitions 0/88 dead transitions. [2022-11-25 17:19:47,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 88 transitions, 433 flow [2022-11-25 17:19:47,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:19:47,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:19:47,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1249 transitions. [2022-11-25 17:19:47,326 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44165487977369167 [2022-11-25 17:19:47,326 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1249 transitions. [2022-11-25 17:19:47,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1249 transitions. [2022-11-25 17:19:47,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:47,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1249 transitions. [2022-11-25 17:19:47,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 178.42857142857142) internal successors, (1249), 7 states have internal predecessors, (1249), 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 17:19:47,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 404.0) internal successors, (3232), 8 states have internal predecessors, (3232), 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 17:19:47,335 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 404.0) internal successors, (3232), 8 states have internal predecessors, (3232), 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 17:19:47,336 INFO L175 Difference]: Start difference. First operand has 65 places, 51 transitions, 169 flow. Second operand 7 states and 1249 transitions. [2022-11-25 17:19:47,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 88 transitions, 433 flow [2022-11-25 17:19:47,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 88 transitions, 427 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:19:47,338 INFO L231 Difference]: Finished difference. Result has 67 places, 50 transitions, 183 flow [2022-11-25 17:19:47,339 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=183, PETRI_PLACES=67, PETRI_TRANSITIONS=50} [2022-11-25 17:19:47,339 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -10 predicate places. [2022-11-25 17:19:47,340 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 50 transitions, 183 flow [2022-11-25 17:19:47,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 167.25) internal successors, (1338), 8 states have internal predecessors, (1338), 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 17:19:47,341 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:47,341 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 17:19:47,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:47,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:47,547 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-25 17:19:47,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:47,547 INFO L85 PathProgramCache]: Analyzing trace with hash -516029765, now seen corresponding path program 2 times [2022-11-25 17:19:47,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:19:47,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1020481925] [2022-11-25 17:19:47,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:19:47,548 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 17:19:47,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:19:47,549 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:47,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:19:47,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:19:47,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:19:47,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 17:19:47,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:48,000 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-25 17:19:48,001 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-25 17:19:48,270 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 17:19:48,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:49,135 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 17:19:49,135 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:19:49,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1020481925] [2022-11-25 17:19:49,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1020481925] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:19:49,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:19:49,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 17:19:49,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248444158] [2022-11-25 17:19:49,136 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:19:49,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:19:49,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:19:49,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:19:49,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:19:55,387 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 404 [2022-11-25 17:19:55,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 50 transitions, 183 flow. Second operand has 12 states, 12 states have (on average 168.0) internal successors, (2016), 12 states have internal predecessors, (2016), 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 17:19:55,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:55,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 404 [2022-11-25 17:19:55,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:05,549 INFO L130 PetriNetUnfolder]: 28838/38147 cut-off events. [2022-11-25 17:20:05,549 INFO L131 PetriNetUnfolder]: For 236/236 co-relation queries the response was YES. [2022-11-25 17:20:05,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77419 conditions, 38147 events. 28838/38147 cut-off events. For 236/236 co-relation queries the response was YES. Maximal size of possible extension queue 1441. Compared 211371 event pairs, 19620 based on Foata normal form. 6/21340 useless extension candidates. Maximal degree in co-relation 77400. Up to 4224 conditions per place. [2022-11-25 17:20:05,737 INFO L137 encePairwiseOnDemand]: 400/404 looper letters, 353 selfloop transitions, 12 changer transitions 0/366 dead transitions. [2022-11-25 17:20:05,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 366 transitions, 1663 flow [2022-11-25 17:20:05,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:20:05,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:20:05,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2375 transitions. [2022-11-25 17:20:05,747 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4898927392739274 [2022-11-25 17:20:05,748 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2375 transitions. [2022-11-25 17:20:05,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2375 transitions. [2022-11-25 17:20:05,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:05,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2375 transitions. [2022-11-25 17:20:05,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 197.91666666666666) internal successors, (2375), 12 states have internal predecessors, (2375), 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 17:20:05,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 404.0) internal successors, (5252), 13 states have internal predecessors, (5252), 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 17:20:05,768 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 404.0) internal successors, (5252), 13 states have internal predecessors, (5252), 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 17:20:05,769 INFO L175 Difference]: Start difference. First operand has 67 places, 50 transitions, 183 flow. Second operand 12 states and 2375 transitions. [2022-11-25 17:20:05,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 366 transitions, 1663 flow [2022-11-25 17:20:05,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 366 transitions, 1648 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-11-25 17:20:05,776 INFO L231 Difference]: Finished difference. Result has 82 places, 57 transitions, 257 flow [2022-11-25 17:20:05,777 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=257, PETRI_PLACES=82, PETRI_TRANSITIONS=57} [2022-11-25 17:20:05,777 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 5 predicate places. [2022-11-25 17:20:05,778 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 57 transitions, 257 flow [2022-11-25 17:20:05,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 168.0) internal successors, (2016), 12 states have internal predecessors, (2016), 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 17:20:05,779 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:05,779 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:05,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:20:05,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:20:05,994 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-25 17:20:05,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:05,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1201328995, now seen corresponding path program 1 times [2022-11-25 17:20:05,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:20:05,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322798750] [2022-11-25 17:20:05,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:05,995 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 17:20:05,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:20:05,997 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:20:06,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:20:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:06,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:20:06,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:06,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:20:06,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:20:06,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:20:06,390 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-25 17:20:06,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-25 17:20:06,417 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 18 treesize of output 16 [2022-11-25 17:20:06,639 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 17:20:06,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:20:06,640 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:20:06,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322798750] [2022-11-25 17:20:06,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322798750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:20:06,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:20:06,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:20:06,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595246584] [2022-11-25 17:20:06,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:20:06,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:20:06,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:20:06,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:20:06,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:20:06,939 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 404 [2022-11-25 17:20:06,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 57 transitions, 257 flow. Second operand has 3 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 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 17:20:06,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:06,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 404 [2022-11-25 17:20:06,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:11,050 INFO L130 PetriNetUnfolder]: 28244/37256 cut-off events. [2022-11-25 17:20:11,050 INFO L131 PetriNetUnfolder]: For 249/249 co-relation queries the response was YES. [2022-11-25 17:20:11,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75669 conditions, 37256 events. 28244/37256 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 1530. Compared 208005 event pairs, 19170 based on Foata normal form. 0/20552 useless extension candidates. Maximal degree in co-relation 75643. Up to 37121 conditions per place. [2022-11-25 17:20:11,300 INFO L137 encePairwiseOnDemand]: 401/404 looper letters, 53 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2022-11-25 17:20:11,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 55 transitions, 361 flow [2022-11-25 17:20:11,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:20:11,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:20:11,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 564 transitions. [2022-11-25 17:20:11,304 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46534653465346537 [2022-11-25 17:20:11,304 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 564 transitions. [2022-11-25 17:20:11,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 564 transitions. [2022-11-25 17:20:11,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:11,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 564 transitions. [2022-11-25 17:20:11,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 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 17:20:11,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 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 17:20:11,310 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 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 17:20:11,310 INFO L175 Difference]: Start difference. First operand has 82 places, 57 transitions, 257 flow. Second operand 3 states and 564 transitions. [2022-11-25 17:20:11,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 55 transitions, 361 flow [2022-11-25 17:20:11,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 55 transitions, 348 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-11-25 17:20:11,314 INFO L231 Difference]: Finished difference. Result has 78 places, 55 transitions, 242 flow [2022-11-25 17:20:11,314 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=78, PETRI_TRANSITIONS=55} [2022-11-25 17:20:11,315 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 1 predicate places. [2022-11-25 17:20:11,315 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 55 transitions, 242 flow [2022-11-25 17:20:11,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 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 17:20:11,316 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:11,316 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:11,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:11,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:20:11,531 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-25 17:20:11,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:11,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1201328996, now seen corresponding path program 1 times [2022-11-25 17:20:11,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:20:11,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943080663] [2022-11-25 17:20:11,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:11,532 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 17:20:11,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:20:11,533 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:20:11,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:20:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:11,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:20:11,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:11,792 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2022-11-25 17:20:11,793 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 5 case distinctions, treesize of input 36 treesize of output 51 [2022-11-25 17:20:12,107 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 17:20:12,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:20:12,108 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:20:12,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943080663] [2022-11-25 17:20:12,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943080663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:20:12,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:20:12,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:20:12,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564986510] [2022-11-25 17:20:12,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:20:12,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:20:12,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:20:12,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:20:12,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:20:12,405 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 404 [2022-11-25 17:20:12,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 55 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 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 17:20:12,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:12,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 404 [2022-11-25 17:20:12,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:16,261 INFO L130 PetriNetUnfolder]: 27650/36365 cut-off events. [2022-11-25 17:20:16,261 INFO L131 PetriNetUnfolder]: For 249/249 co-relation queries the response was YES. [2022-11-25 17:20:16,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73876 conditions, 36365 events. 27650/36365 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 1515. Compared 201826 event pairs, 18720 based on Foata normal form. 0/20210 useless extension candidates. Maximal degree in co-relation 73849. Up to 36230 conditions per place. [2022-11-25 17:20:16,456 INFO L137 encePairwiseOnDemand]: 401/404 looper letters, 51 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2022-11-25 17:20:16,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 53 transitions, 342 flow [2022-11-25 17:20:16,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:20:16,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:20:16,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 556 transitions. [2022-11-25 17:20:16,459 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45874587458745875 [2022-11-25 17:20:16,459 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 556 transitions. [2022-11-25 17:20:16,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 556 transitions. [2022-11-25 17:20:16,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:16,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 556 transitions. [2022-11-25 17:20:16,462 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 17:20:16,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 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 17:20:16,465 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 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 17:20:16,466 INFO L175 Difference]: Start difference. First operand has 78 places, 55 transitions, 242 flow. Second operand 3 states and 556 transitions. [2022-11-25 17:20:16,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 53 transitions, 342 flow [2022-11-25 17:20:16,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 53 transitions, 341 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:20:16,470 INFO L231 Difference]: Finished difference. Result has 77 places, 53 transitions, 239 flow [2022-11-25 17:20:16,470 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=239, PETRI_PLACES=77, PETRI_TRANSITIONS=53} [2022-11-25 17:20:16,471 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 0 predicate places. [2022-11-25 17:20:16,471 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 53 transitions, 239 flow [2022-11-25 17:20:16,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 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 17:20:16,472 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:16,472 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:16,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:20:16,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:20:16,687 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-25 17:20:16,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:16,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1201120567, now seen corresponding path program 1 times [2022-11-25 17:20:16,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:20:16,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826990170] [2022-11-25 17:20:16,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:16,688 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 17:20:16,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:20:16,690 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:20:16,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:20:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:16,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:20:16,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:16,922 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 17:20:16,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:20:16,922 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:20:16,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826990170] [2022-11-25 17:20:16,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826990170] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:20:16,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:20:16,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:20:16,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122319698] [2022-11-25 17:20:16,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:20:16,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:20:16,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:20:16,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:20:16,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:20:17,450 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 404 [2022-11-25 17:20:17,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 53 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 171.16666666666666) internal successors, (1027), 6 states have internal predecessors, (1027), 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 17:20:17,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:17,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 404 [2022-11-25 17:20:17,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:24,343 INFO L130 PetriNetUnfolder]: 41933/54851 cut-off events. [2022-11-25 17:20:24,343 INFO L131 PetriNetUnfolder]: For 267/267 co-relation queries the response was YES. [2022-11-25 17:20:24,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111461 conditions, 54851 events. 41933/54851 cut-off events. For 267/267 co-relation queries the response was YES. Maximal size of possible extension queue 2235. Compared 327276 event pairs, 6201 based on Foata normal form. 0/30875 useless extension candidates. Maximal degree in co-relation 111433. Up to 37404 conditions per place. [2022-11-25 17:20:24,668 INFO L137 encePairwiseOnDemand]: 397/404 looper letters, 91 selfloop transitions, 6 changer transitions 0/98 dead transitions. [2022-11-25 17:20:24,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 98 transitions, 533 flow [2022-11-25 17:20:24,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:20:24,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:20:24,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 934 transitions. [2022-11-25 17:20:24,673 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4623762376237624 [2022-11-25 17:20:24,673 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 934 transitions. [2022-11-25 17:20:24,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 934 transitions. [2022-11-25 17:20:24,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:24,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 934 transitions. [2022-11-25 17:20:24,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 186.8) internal successors, (934), 5 states have internal predecessors, (934), 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 17:20:24,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 404.0) internal successors, (2424), 6 states have internal predecessors, (2424), 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 17:20:24,680 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 404.0) internal successors, (2424), 6 states have internal predecessors, (2424), 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 17:20:24,680 INFO L175 Difference]: Start difference. First operand has 77 places, 53 transitions, 239 flow. Second operand 5 states and 934 transitions. [2022-11-25 17:20:24,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 98 transitions, 533 flow [2022-11-25 17:20:24,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 98 transitions, 532 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:20:24,685 INFO L231 Difference]: Finished difference. Result has 82 places, 57 transitions, 274 flow [2022-11-25 17:20:24,685 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=274, PETRI_PLACES=82, PETRI_TRANSITIONS=57} [2022-11-25 17:20:24,686 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 5 predicate places. [2022-11-25 17:20:24,686 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 57 transitions, 274 flow [2022-11-25 17:20:24,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 171.16666666666666) internal successors, (1027), 6 states have internal predecessors, (1027), 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 17:20:24,687 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:24,687 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:24,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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)] Ended with exit code 0 [2022-11-25 17:20:24,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:20:24,901 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-25 17:20:24,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:24,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1419964763, now seen corresponding path program 1 times [2022-11-25 17:20:24,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:20:24,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935771398] [2022-11-25 17:20:24,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:24,902 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 17:20:24,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:20:24,903 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:20:24,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:20:25,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:25,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:20:25,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:25,342 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-25 17:20:25,343 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-25 17:20:25,575 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 17:20:25,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:20:26,092 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 17:20:26,093 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:20:26,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935771398] [2022-11-25 17:20:26,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935771398] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:20:26,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:20:26,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 17:20:26,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633817745] [2022-11-25 17:20:26,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:20:26,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:20:26,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:20:26,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:20:26,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:20:31,052 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 404 [2022-11-25 17:20:31,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 57 transitions, 274 flow. Second operand has 10 states, 10 states have (on average 164.6) internal successors, (1646), 10 states have internal predecessors, (1646), 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 17:20:31,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:31,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 404 [2022-11-25 17:20:31,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:42,807 INFO L130 PetriNetUnfolder]: 60392/77954 cut-off events. [2022-11-25 17:20:42,808 INFO L131 PetriNetUnfolder]: For 18375/18375 co-relation queries the response was YES. [2022-11-25 17:20:43,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184391 conditions, 77954 events. 60392/77954 cut-off events. For 18375/18375 co-relation queries the response was YES. Maximal size of possible extension queue 2937. Compared 465703 event pairs, 12429 based on Foata normal form. 1548/59261 useless extension candidates. Maximal degree in co-relation 184360. Up to 27235 conditions per place. [2022-11-25 17:20:43,288 INFO L137 encePairwiseOnDemand]: 398/404 looper letters, 131 selfloop transitions, 13 changer transitions 0/145 dead transitions. [2022-11-25 17:20:43,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 145 transitions, 776 flow [2022-11-25 17:20:43,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:20:43,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 17:20:43,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1435 transitions. [2022-11-25 17:20:43,294 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4439975247524752 [2022-11-25 17:20:43,294 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1435 transitions. [2022-11-25 17:20:43,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1435 transitions. [2022-11-25 17:20:43,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:43,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1435 transitions. [2022-11-25 17:20:43,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 179.375) internal successors, (1435), 8 states have internal predecessors, (1435), 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 17:20:43,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 404.0) internal successors, (3636), 9 states have internal predecessors, (3636), 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 17:20:43,306 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 404.0) internal successors, (3636), 9 states have internal predecessors, (3636), 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 17:20:43,306 INFO L175 Difference]: Start difference. First operand has 82 places, 57 transitions, 274 flow. Second operand 8 states and 1435 transitions. [2022-11-25 17:20:43,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 145 transitions, 776 flow [2022-11-25 17:20:43,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 145 transitions, 768 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-25 17:20:43,330 INFO L231 Difference]: Finished difference. Result has 92 places, 62 transitions, 341 flow [2022-11-25 17:20:43,330 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=341, PETRI_PLACES=92, PETRI_TRANSITIONS=62} [2022-11-25 17:20:43,331 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 15 predicate places. [2022-11-25 17:20:43,331 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 62 transitions, 341 flow [2022-11-25 17:20:43,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 164.6) internal successors, (1646), 10 states have internal predecessors, (1646), 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 17:20:43,332 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:43,332 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:43,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:20:43,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:20:43,545 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-25 17:20:43,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:43,546 INFO L85 PathProgramCache]: Analyzing trace with hash -869019159, now seen corresponding path program 1 times [2022-11-25 17:20:43,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:20:43,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136980795] [2022-11-25 17:20:43,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:43,546 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 17:20:43,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:20:43,547 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:20:43,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dcd9116-62e5-4a30-b706-f3888fe298e8/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 17:20:43,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:43,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:20:43,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:43,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:20:43,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:20:43,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:20:43,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:20:43,914 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 17:20:43,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-25 17:20:43,927 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 22 treesize of output 20 [2022-11-25 17:20:43,993 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 17:20:43,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:20:43,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:20:43,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136980795] [2022-11-25 17:20:43,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [136980795] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:20:43,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:20:43,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:20:43,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006953099] [2022-11-25 17:20:43,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:20:43,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:20:43,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:20:43,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:20:43,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:20:44,219 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 404 [2022-11-25 17:20:44,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 62 transitions, 341 flow. Second operand has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 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 17:20:44,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:44,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 404 [2022-11-25 17:20:44,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand