./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b 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_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP --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 b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:11:46,301 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:11:46,436 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 23:11:46,447 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:11:46,448 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:11:46,512 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:11:46,514 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:11:46,514 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:11:46,516 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:11:46,524 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:11:46,526 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:11:46,527 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:11:46,529 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:11:46,531 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:11:46,532 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:11:46,533 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:11:46,533 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:11:46,534 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:11:46,534 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 23:11:46,535 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 23:11:46,535 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 23:11:46,536 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:11:46,536 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 23:11:46,537 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 23:11:46,537 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:11:46,538 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:11:46,538 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:11:46,539 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:11:46,540 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:11:46,540 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:11:46,541 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:11:46,541 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:11:46,542 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:11:46,542 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:11:46,542 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:11:46,543 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:11:46,543 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:11:46,543 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:11:46,544 INFO L153 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_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 [2023-11-06 23:11:46,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:11:47,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:11:47,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:11:47,010 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:11:47,011 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:11:47,014 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2023-11-06 23:11:50,839 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:11:51,118 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:11:51,119 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2023-11-06 23:11:51,129 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/data/9fdf95f8e/936bfd18d2224db8a94390e06be80d14/FLAGb20606e84 [2023-11-06 23:11:51,154 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/data/9fdf95f8e/936bfd18d2224db8a94390e06be80d14 [2023-11-06 23:11:51,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:11:51,172 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:11:51,174 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:11:51,175 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:11:51,181 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:11:51,182 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:11:51" (1/1) ... [2023-11-06 23:11:51,184 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@920dc3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:51, skipping insertion in model container [2023-11-06 23:11:51,184 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:11:51" (1/1) ... [2023-11-06 23:11:51,237 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:11:51,501 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:11:51,516 ERROR L324 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) [2023-11-06 23:11:51,516 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@16202472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:51, skipping insertion in model container [2023-11-06 23:11:51,517 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:11:51,517 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-06 23:11:51,520 INFO L158 Benchmark]: Toolchain (without parser) took 346.72ms. Allocated memory is still 132.1MB. Free memory was 93.2MB in the beginning and 82.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 23:11:51,520 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 132.1MB. Free memory is still 106.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 23:11:51,521 INFO L158 Benchmark]: CACSL2BoogieTranslator took 342.83ms. Allocated memory is still 132.1MB. Free memory was 92.7MB in the beginning and 82.7MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-06 23:11:51,523 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 132.1MB. Free memory is still 106.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 342.83ms. Allocated memory is still 132.1MB. Free memory was 92.7MB in the beginning and 82.7MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 124]: 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_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP --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 b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:11:54,591 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:11:54,745 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-06 23:11:54,756 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:11:54,766 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:11:54,824 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:11:54,825 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:11:54,826 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:11:54,827 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:11:54,833 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:11:54,834 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:11:54,834 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:11:54,835 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:11:54,836 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:11:54,836 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:11:54,837 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:11:54,837 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:11:54,837 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:11:54,838 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 23:11:54,838 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 23:11:54,838 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 23:11:54,839 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:11:54,840 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 23:11:54,840 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 23:11:54,841 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 23:11:54,841 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 23:11:54,842 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:11:54,842 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:11:54,843 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:11:54,844 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:11:54,846 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:11:54,846 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:11:54,847 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:11:54,847 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:11:54,848 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-06 23:11:54,848 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 23:11:54,848 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:11:54,849 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:11:54,849 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:11:54,850 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-06 23:11:54,850 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:11:54,851 INFO L153 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_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 [2023-11-06 23:11:55,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:11:55,384 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:11:55,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:11:55,389 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:11:55,390 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:11:55,392 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2023-11-06 23:11:58,947 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:11:59,314 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:11:59,315 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2023-11-06 23:11:59,325 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/data/0e61eea8b/612910a183d44692b2b57550a1decaaa/FLAG963227602 [2023-11-06 23:11:59,344 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/data/0e61eea8b/612910a183d44692b2b57550a1decaaa [2023-11-06 23:11:59,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:11:59,349 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:11:59,351 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:11:59,351 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:11:59,358 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:11:59,359 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:11:59" (1/1) ... [2023-11-06 23:11:59,360 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2839b0ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:59, skipping insertion in model container [2023-11-06 23:11:59,361 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:11:59" (1/1) ... [2023-11-06 23:11:59,415 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:11:59,770 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:11:59,796 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-06 23:11:59,812 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:11:59,862 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:11:59,878 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:11:59,938 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:11:59,992 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:11:59,993 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:59 WrapperNode [2023-11-06 23:11:59,993 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:11:59,995 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:11:59,995 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:11:59,995 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:12:00,006 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:59" (1/1) ... [2023-11-06 23:12:00,037 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:59" (1/1) ... [2023-11-06 23:12:00,099 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 18, calls inlined = 18, statements flattened = 207 [2023-11-06 23:12:00,099 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:12:00,100 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:12:00,101 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:12:00,101 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:12:00,113 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:59" (1/1) ... [2023-11-06 23:12:00,113 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:59" (1/1) ... [2023-11-06 23:12:00,139 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:59" (1/1) ... [2023-11-06 23:12:00,140 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:59" (1/1) ... [2023-11-06 23:12:00,168 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:59" (1/1) ... [2023-11-06 23:12:00,174 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:59" (1/1) ... [2023-11-06 23:12:00,177 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:59" (1/1) ... [2023-11-06 23:12:00,179 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:59" (1/1) ... [2023-11-06 23:12:00,190 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:12:00,191 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:12:00,191 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:12:00,192 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:12:00,193 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:59" (1/1) ... [2023-11-06 23:12:00,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:12:00,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:00,246 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:12:00,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:12:00,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:12:00,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 23:12:00,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:12:00,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-06 23:12:00,304 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 23:12:00,304 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 23:12:00,305 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 23:12:00,305 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 23:12:00,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 23:12:00,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:12:00,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:12:00,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:12:00,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-06 23:12:00,310 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 23:12:00,489 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:12:00,492 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:12:01,642 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:12:01,656 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:12:01,657 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 23:12:01,661 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:12:01 BoogieIcfgContainer [2023-11-06 23:12:01,663 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:12:01,667 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:12:01,668 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:12:01,673 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:12:01,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:11:59" (1/3) ... [2023-11-06 23:12:01,674 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a2a1695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:12:01, skipping insertion in model container [2023-11-06 23:12:01,674 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:59" (2/3) ... [2023-11-06 23:12:01,678 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a2a1695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:12:01, skipping insertion in model container [2023-11-06 23:12:01,678 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:12:01" (3/3) ... [2023-11-06 23:12:01,680 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-5.wvr.c [2023-11-06 23:12:01,706 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:12:01,707 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-11-06 23:12:01,707 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:12:01,921 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 23:12:01,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 304 transitions, 622 flow [2023-11-06 23:12:02,174 INFO L124 PetriNetUnfolderBase]: 24/302 cut-off events. [2023-11-06 23:12:02,175 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:12:02,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 302 events. 24/302 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 697 event pairs, 0 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 195. Up to 2 conditions per place. [2023-11-06 23:12:02,188 INFO L82 GeneralOperation]: Start removeDead. Operand has 287 places, 304 transitions, 622 flow [2023-11-06 23:12:02,200 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 280 places, 297 transitions, 606 flow [2023-11-06 23:12:02,204 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:12:02,217 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 280 places, 297 transitions, 606 flow [2023-11-06 23:12:02,220 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 280 places, 297 transitions, 606 flow [2023-11-06 23:12:02,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 280 places, 297 transitions, 606 flow [2023-11-06 23:12:02,308 INFO L124 PetriNetUnfolderBase]: 24/297 cut-off events. [2023-11-06 23:12:02,308 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:12:02,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 297 events. 24/297 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 684 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 195. Up to 2 conditions per place. [2023-11-06 23:12:02,321 INFO L119 LiptonReduction]: Number of co-enabled transitions 10684 [2023-11-06 23:13:43,444 INFO L134 LiptonReduction]: Checked pairs total: 11055 [2023-11-06 23:13:43,444 INFO L136 LiptonReduction]: Total number of compositions: 378 [2023-11-06 23:13:43,459 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:13:43,466 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;@179dd05e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:13:43,466 INFO L358 AbstractCegarLoop]: Starting to check reachability of 54 error locations. [2023-11-06 23:13:43,470 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:13:43,470 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 23:13:43,470 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:13:43,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:13:43,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 23:13:43,472 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-06 23:13:43,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:13:43,477 INFO L85 PathProgramCache]: Analyzing trace with hash 41042, now seen corresponding path program 1 times [2023-11-06 23:13:43,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:13:43,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [319060647] [2023-11-06 23:13:43,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:43,493 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 [2023-11-06 23:13:43,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:13:43,498 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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) [2023-11-06 23:13:43,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:13:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:43,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:13:43,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:13:43,712 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 23:13:43,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:13:43,741 INFO L351 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 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:13:43,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:13:43,755 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:13:43,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:13:43,762 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:13:43,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:13:43,774 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:13:43,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:13:43,784 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:13:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:13:43,794 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:13:43,794 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:13:43,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [319060647] [2023-11-06 23:13:43,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [319060647] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:13:43,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:13:43,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:13:43,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176763042] [2023-11-06 23:13:43,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:13:43,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:13:43,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:13:43,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:13:43,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:13:44,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 682 [2023-11-06 23:13:44,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:44,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:13:44,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 682 [2023-11-06 23:13:44,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:13:45,185 INFO L124 PetriNetUnfolderBase]: 1179/1614 cut-off events. [2023-11-06 23:13:45,186 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-11-06 23:13:45,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3257 conditions, 1614 events. 1179/1614 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 7855 event pairs, 569 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 2823. Up to 1607 conditions per place. [2023-11-06 23:13:45,211 INFO L140 encePairwiseOnDemand]: 672/682 looper letters, 36 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2023-11-06 23:13:45,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 42 transitions, 176 flow [2023-11-06 23:13:45,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:13:45,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:13:45,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 871 transitions. [2023-11-06 23:13:45,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4257086999022483 [2023-11-06 23:13:45,238 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 871 transitions. [2023-11-06 23:13:45,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 871 transitions. [2023-11-06 23:13:45,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:13:45,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 871 transitions. [2023-11-06 23:13:45,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 290.3333333333333) internal successors, (871), 3 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:45,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:45,269 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:45,271 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 108 flow. Second operand 3 states and 871 transitions. [2023-11-06 23:13:45,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 42 transitions, 176 flow [2023-11-06 23:13:45,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 42 transitions, 168 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 23:13:45,278 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 96 flow [2023-11-06 23:13:45,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2023-11-06 23:13:45,284 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -8 predicate places. [2023-11-06 23:13:45,285 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 96 flow [2023-11-06 23:13:45,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:45,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:13:45,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 23:13:45,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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)] Ended with exit code 0 [2023-11-06 23:13:45,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:13:45,508 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-06 23:13:45,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:13:45,509 INFO L85 PathProgramCache]: Analyzing trace with hash 41145, now seen corresponding path program 1 times [2023-11-06 23:13:45,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:13:45,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051007736] [2023-11-06 23:13:45,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:45,510 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 [2023-11-06 23:13:45,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:13:45,511 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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) [2023-11-06 23:13:45,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:13:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:45,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:13:45,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:13:45,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:13:45,630 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:13:45,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:13:45,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051007736] [2023-11-06 23:13:45,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051007736] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:13:45,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:13:45,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:13:45,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125748603] [2023-11-06 23:13:45,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:13:45,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:13:45,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:13:45,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:13:45,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:13:45,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 682 [2023-11-06 23:13:45,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 276.6666666666667) internal successors, (830), 3 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:45,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:13:45,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 682 [2023-11-06 23:13:45,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:13:46,713 INFO L124 PetriNetUnfolderBase]: 1179/1616 cut-off events. [2023-11-06 23:13:46,714 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 23:13:46,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3240 conditions, 1616 events. 1179/1616 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 7825 event pairs, 569 based on Foata normal form. 1/308 useless extension candidates. Maximal degree in co-relation 3217. Up to 1610 conditions per place. [2023-11-06 23:13:46,730 INFO L140 encePairwiseOnDemand]: 677/682 looper letters, 40 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-11-06 23:13:46,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 184 flow [2023-11-06 23:13:46,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:13:46,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:13:46,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 873 transitions. [2023-11-06 23:13:46,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42668621700879766 [2023-11-06 23:13:46,736 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 873 transitions. [2023-11-06 23:13:46,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 873 transitions. [2023-11-06 23:13:46,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:13:46,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 873 transitions. [2023-11-06 23:13:46,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 291.0) internal successors, (873), 3 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:46,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:46,750 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:46,751 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 96 flow. Second operand 3 states and 873 transitions. [2023-11-06 23:13:46,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 184 flow [2023-11-06 23:13:46,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:13:46,754 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 104 flow [2023-11-06 23:13:46,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2023-11-06 23:13:46,755 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2023-11-06 23:13:46,755 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 104 flow [2023-11-06 23:13:46,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 276.6666666666667) internal successors, (830), 3 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:46,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:13:46,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 23:13:46,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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)] Ended with exit code 0 [2023-11-06 23:13:46,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:13:46,968 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-06 23:13:46,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:13:46,969 INFO L85 PathProgramCache]: Analyzing trace with hash 41043, now seen corresponding path program 1 times [2023-11-06 23:13:46,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:13:46,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [55801187] [2023-11-06 23:13:46,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:46,970 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 [2023-11-06 23:13:46,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:13:46,972 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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) [2023-11-06 23:13:47,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:13:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:47,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:13:47,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:13:47,096 INFO L351 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 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-06 23:13:47,130 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 23:13:47,159 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 23:13:47,180 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 23:13:47,203 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 23:13:47,222 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 23:13:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:13:47,275 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:13:47,275 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:13:47,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [55801187] [2023-11-06 23:13:47,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [55801187] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:13:47,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:13:47,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:13:47,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063118834] [2023-11-06 23:13:47,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:13:47,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:13:47,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:13:47,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:13:47,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:13:49,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:13:49,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 682 [2023-11-06 23:13:49,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:49,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:13:49,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 682 [2023-11-06 23:13:49,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:13:50,906 INFO L124 PetriNetUnfolderBase]: 1179/1615 cut-off events. [2023-11-06 23:13:50,906 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 23:13:50,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3242 conditions, 1615 events. 1179/1615 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 7728 event pairs, 569 based on Foata normal form. 1/308 useless extension candidates. Maximal degree in co-relation 3231. Up to 1610 conditions per place. [2023-11-06 23:13:50,920 INFO L140 encePairwiseOnDemand]: 679/682 looper letters, 39 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-11-06 23:13:50,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 186 flow [2023-11-06 23:13:50,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:13:50,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:13:50,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 867 transitions. [2023-11-06 23:13:50,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4237536656891496 [2023-11-06 23:13:50,925 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 867 transitions. [2023-11-06 23:13:50,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 867 transitions. [2023-11-06 23:13:50,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:13:50,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 867 transitions. [2023-11-06 23:13:50,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.0) internal successors, (867), 3 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:50,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:50,938 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:50,938 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 104 flow. Second operand 3 states and 867 transitions. [2023-11-06 23:13:50,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 186 flow [2023-11-06 23:13:50,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 182 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 23:13:50,941 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 108 flow [2023-11-06 23:13:50,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-11-06 23:13:50,943 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2023-11-06 23:13:50,943 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 108 flow [2023-11-06 23:13:50,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:50,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:13:50,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 23:13:50,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:13:51,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:13:51,168 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-06 23:13:51,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:13:51,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1275618, now seen corresponding path program 1 times [2023-11-06 23:13:51,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:13:51,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1291130735] [2023-11-06 23:13:51,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:51,169 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 [2023-11-06 23:13:51,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:13:51,170 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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) [2023-11-06 23:13:51,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:13:51,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:51,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:13:51,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:13:51,267 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 23:13:51,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:13:51,289 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:13:51,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:13:51,307 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:13:51,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:13:51,325 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:13:51,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:13:51,355 INFO L351 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 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:13:51,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:13:51,372 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:13:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:13:51,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:13:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:13:51,687 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:13:51,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1291130735] [2023-11-06 23:13:51,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1291130735] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:13:51,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:13:51,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-06 23:13:51,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508365398] [2023-11-06 23:13:51,688 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:13:51,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:13:51,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:13:51,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:13:51,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:13:53,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 682 [2023-11-06 23:13:53,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 108 flow. Second operand has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:53,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:13:53,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 682 [2023-11-06 23:13:53,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:13:54,989 INFO L124 PetriNetUnfolderBase]: 1188/1627 cut-off events. [2023-11-06 23:13:54,989 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 23:13:54,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3281 conditions, 1627 events. 1188/1627 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 7909 event pairs, 569 based on Foata normal form. 3/313 useless extension candidates. Maximal degree in co-relation 3268. Up to 1619 conditions per place. [2023-11-06 23:13:55,002 INFO L140 encePairwiseOnDemand]: 676/682 looper letters, 39 selfloop transitions, 14 changer transitions 0/55 dead transitions. [2023-11-06 23:13:55,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 55 transitions, 262 flow [2023-11-06 23:13:55,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:13:55,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:13:55,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1670 transitions. [2023-11-06 23:13:55,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40811339198435975 [2023-11-06 23:13:55,013 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1670 transitions. [2023-11-06 23:13:55,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1670 transitions. [2023-11-06 23:13:55,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:13:55,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1670 transitions. [2023-11-06 23:13:55,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 278.3333333333333) internal successors, (1670), 6 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:55,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 682.0) internal successors, (4774), 7 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:55,034 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 682.0) internal successors, (4774), 7 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:55,034 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 108 flow. Second operand 6 states and 1670 transitions. [2023-11-06 23:13:55,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 55 transitions, 262 flow [2023-11-06 23:13:55,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 258 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:13:55,037 INFO L231 Difference]: Finished difference. Result has 53 places, 55 transitions, 209 flow [2023-11-06 23:13:55,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=209, PETRI_PLACES=53, PETRI_TRANSITIONS=55} [2023-11-06 23:13:55,038 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2023-11-06 23:13:55,038 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 55 transitions, 209 flow [2023-11-06 23:13:55,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:55,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:13:55,040 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-11-06 23:13:55,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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)] Ended with exit code 0 [2023-11-06 23:13:55,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:13:55,252 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-06 23:13:55,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:13:55,252 INFO L85 PathProgramCache]: Analyzing trace with hash 39547545, now seen corresponding path program 1 times [2023-11-06 23:13:55,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:13:55,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069506331] [2023-11-06 23:13:55,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:55,253 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 [2023-11-06 23:13:55,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:13:55,254 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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) [2023-11-06 23:13:55,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:13:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:55,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 23:13:55,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:13:55,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:13:55,422 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 23:13:55,423 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2023-11-06 23:13:55,437 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 23:13:55,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:13:55,527 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2023-11-06 23:13:55,542 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 23:13:55,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:13:55,906 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:13:55,906 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:13:55,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069506331] [2023-11-06 23:13:55,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069506331] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:13:55,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:13:55,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:13:55,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732681821] [2023-11-06 23:13:55,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:13:55,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:13:55,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:13:55,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:13:55,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:13:56,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 682 [2023-11-06 23:13:56,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 55 transitions, 209 flow. Second operand has 3 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:56,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:13:56,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 682 [2023-11-06 23:13:56,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:13:57,384 INFO L124 PetriNetUnfolderBase]: 893/1246 cut-off events. [2023-11-06 23:13:57,384 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-06 23:13:57,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2542 conditions, 1246 events. 893/1246 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 5981 event pairs, 425 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 2520. Up to 1241 conditions per place. [2023-11-06 23:13:57,394 INFO L140 encePairwiseOnDemand]: 679/682 looper letters, 47 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-11-06 23:13:57,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 50 transitions, 276 flow [2023-11-06 23:13:57,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:13:57,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:13:57,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 865 transitions. [2023-11-06 23:13:57,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4227761485826002 [2023-11-06 23:13:57,399 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 865 transitions. [2023-11-06 23:13:57,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 865 transitions. [2023-11-06 23:13:57,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:13:57,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 865 transitions. [2023-11-06 23:13:57,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 288.3333333333333) internal successors, (865), 3 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:57,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:57,425 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:57,425 INFO L175 Difference]: Start difference. First operand has 53 places, 55 transitions, 209 flow. Second operand 3 states and 865 transitions. [2023-11-06 23:13:57,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 50 transitions, 276 flow [2023-11-06 23:13:57,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 50 transitions, 242 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-11-06 23:13:57,431 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 148 flow [2023-11-06 23:13:57,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2023-11-06 23:13:57,435 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2023-11-06 23:13:57,435 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 148 flow [2023-11-06 23:13:57,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:57,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:13:57,437 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-11-06 23:13:57,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:13:57,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:13:57,649 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-06 23:13:57,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:13:57,649 INFO L85 PathProgramCache]: Analyzing trace with hash 39547544, now seen corresponding path program 1 times [2023-11-06 23:13:57,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:13:57,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1463844958] [2023-11-06 23:13:57,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:57,650 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 [2023-11-06 23:13:57,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:13:57,652 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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) [2023-11-06 23:13:57,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:13:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:57,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 23:13:57,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:13:57,780 INFO L322 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-06 23:13:57,781 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-06 23:13:57,807 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:13:57,807 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-11-06 23:13:57,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:13:57,892 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:13:57,892 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:13:57,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1463844958] [2023-11-06 23:13:57,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1463844958] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:13:57,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:13:57,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:13:57,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703502773] [2023-11-06 23:13:57,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:13:57,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:13:57,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:13:57,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:13:57,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:13:58,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 682 [2023-11-06 23:13:58,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:58,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:13:58,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 682 [2023-11-06 23:13:58,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:13:58,921 INFO L124 PetriNetUnfolderBase]: 598/865 cut-off events. [2023-11-06 23:13:58,921 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 23:13:58,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1757 conditions, 865 events. 598/865 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 4081 event pairs, 281 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 1745. Up to 860 conditions per place. [2023-11-06 23:13:58,927 INFO L140 encePairwiseOnDemand]: 679/682 looper letters, 42 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-11-06 23:13:58,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 45 transitions, 213 flow [2023-11-06 23:13:58,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:13:58,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:13:58,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 854 transitions. [2023-11-06 23:13:58,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173998044965787 [2023-11-06 23:13:58,932 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 854 transitions. [2023-11-06 23:13:58,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 854 transitions. [2023-11-06 23:13:58,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:13:58,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 854 transitions. [2023-11-06 23:13:58,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 284.6666666666667) internal successors, (854), 3 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:58,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:58,940 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:58,941 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 148 flow. Second operand 3 states and 854 transitions. [2023-11-06 23:13:58,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 45 transitions, 213 flow [2023-11-06 23:13:58,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 45 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:13:58,943 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 128 flow [2023-11-06 23:13:58,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-11-06 23:13:58,944 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -2 predicate places. [2023-11-06 23:13:58,945 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 128 flow [2023-11-06 23:13:58,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:58,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:13:58,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 23:13:58,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:13:59,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:13:59,157 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-06 23:13:59,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:13:59,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1225996570, now seen corresponding path program 1 times [2023-11-06 23:13:59,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:13:59,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [513282028] [2023-11-06 23:13:59,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:59,158 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 [2023-11-06 23:13:59,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:13:59,159 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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) [2023-11-06 23:13:59,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:13:59,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:59,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 23:13:59,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:13:59,302 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 23:13:59,303 INFO L351 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 1 case distinctions, treesize of input 11 treesize of output 17 [2023-11-06 23:13:59,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:13:59,360 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 23:13:59,360 INFO L351 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 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-06 23:13:59,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:13:59,395 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 23:13:59,396 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-06 23:13:59,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:13:59,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:14:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:14:00,101 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:14:00,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [513282028] [2023-11-06 23:14:00,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [513282028] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:14:00,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:14:00,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-06 23:14:00,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264774127] [2023-11-06 23:14:00,102 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:14:00,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:14:00,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:14:00,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:14:00,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:14:02,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 682 [2023-11-06 23:14:02,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 128 flow. Second operand has 8 states, 8 states have (on average 265.25) internal successors, (2122), 8 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:02,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:14:02,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 682 [2023-11-06 23:14:02,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:14:03,210 INFO L124 PetriNetUnfolderBase]: 559/804 cut-off events. [2023-11-06 23:14:03,210 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 23:14:03,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1636 conditions, 804 events. 559/804 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 3773 event pairs, 262 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 1623. Up to 797 conditions per place. [2023-11-06 23:14:03,215 INFO L140 encePairwiseOnDemand]: 677/682 looper letters, 37 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2023-11-06 23:14:03,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 43 transitions, 206 flow [2023-11-06 23:14:03,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:14:03,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:14:03,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1359 transitions. [2023-11-06 23:14:03,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398533724340176 [2023-11-06 23:14:03,221 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1359 transitions. [2023-11-06 23:14:03,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1359 transitions. [2023-11-06 23:14:03,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:14:03,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1359 transitions. [2023-11-06 23:14:03,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 271.8) internal successors, (1359), 5 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:03,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:03,234 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:03,234 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 128 flow. Second operand 5 states and 1359 transitions. [2023-11-06 23:14:03,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 43 transitions, 206 flow [2023-11-06 23:14:03,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 43 transitions, 205 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:14:03,237 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 131 flow [2023-11-06 23:14:03,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=131, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2023-11-06 23:14:03,238 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2023-11-06 23:14:03,238 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 131 flow [2023-11-06 23:14:03,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 265.25) internal successors, (2122), 8 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:03,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:14:03,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 23:14:03,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:14:03,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:14:03,451 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-06 23:14:03,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:14:03,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1225996572, now seen corresponding path program 1 times [2023-11-06 23:14:03,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:14:03,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1922950676] [2023-11-06 23:14:03,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:14:03,452 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 [2023-11-06 23:14:03,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:14:03,453 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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) [2023-11-06 23:14:03,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:14:03,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:14:03,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:14:03,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:14:03,584 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:14:03,585 INFO L351 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-06 23:14:03,606 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:14:03,607 INFO L351 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-06 23:14:03,642 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:14:03,642 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-06 23:14:03,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:14:03,712 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:14:03,712 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:14:03,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1922950676] [2023-11-06 23:14:03,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1922950676] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:14:03,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:14:03,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:14:03,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544019933] [2023-11-06 23:14:03,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:14:03,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:14:03,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:14:03,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:14:03,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:14:03,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 682 [2023-11-06 23:14:03,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 273.6666666666667) internal successors, (821), 3 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:03,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:14:03,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 682 [2023-11-06 23:14:03,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:14:04,492 INFO L124 PetriNetUnfolderBase]: 520/743 cut-off events. [2023-11-06 23:14:04,492 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 23:14:04,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1518 conditions, 743 events. 520/743 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 3379 event pairs, 243 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 1504. Up to 738 conditions per place. [2023-11-06 23:14:04,497 INFO L140 encePairwiseOnDemand]: 679/682 looper letters, 38 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-11-06 23:14:04,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 41 transitions, 205 flow [2023-11-06 23:14:04,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:14:04,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:14:04,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 850 transitions. [2023-11-06 23:14:04,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41544477028348 [2023-11-06 23:14:04,501 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 850 transitions. [2023-11-06 23:14:04,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 850 transitions. [2023-11-06 23:14:04,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:14:04,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 850 transitions. [2023-11-06 23:14:04,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 283.3333333333333) internal successors, (850), 3 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:04,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:04,509 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:04,509 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 131 flow. Second operand 3 states and 850 transitions. [2023-11-06 23:14:04,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 41 transitions, 205 flow [2023-11-06 23:14:04,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 41 transitions, 199 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 23:14:04,512 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 123 flow [2023-11-06 23:14:04,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2023-11-06 23:14:04,513 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -4 predicate places. [2023-11-06 23:14:04,513 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 123 flow [2023-11-06 23:14:04,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 273.6666666666667) internal successors, (821), 3 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:04,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:14:04,514 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 23:14:04,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:14:04,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:14:04,725 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-06 23:14:04,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:14:04,726 INFO L85 PathProgramCache]: Analyzing trace with hash -649507821, now seen corresponding path program 2 times [2023-11-06 23:14:04,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:14:04,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144829463] [2023-11-06 23:14:04,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:14:04,726 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 [2023-11-06 23:14:04,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:14:04,728 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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) [2023-11-06 23:14:04,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:14:04,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:14:04,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:14:04,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 23:14:04,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:14:04,859 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 23:14:04,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:14:04,872 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:14:04,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:14:04,882 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:14:04,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:14:04,894 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:14:04,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:14:04,918 INFO L351 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 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:14:04,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:14:04,931 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:14:05,174 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:14:05,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:14:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:14:06,019 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:14:06,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144829463] [2023-11-06 23:14:06,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144829463] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:14:06,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:14:06,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 23:14:06,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941416421] [2023-11-06 23:14:06,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:14:06,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:14:06,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:14:06,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:14:06,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:14:11,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 682 [2023-11-06 23:14:11,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 123 flow. Second operand has 12 states, 12 states have (on average 270.0) internal successors, (3240), 12 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:11,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:14:11,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 682 [2023-11-06 23:14:11,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:14:16,071 INFO L124 PetriNetUnfolderBase]: 526/755 cut-off events. [2023-11-06 23:14:16,071 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2023-11-06 23:14:16,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1553 conditions, 755 events. 526/755 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 3336 event pairs, 243 based on Foata normal form. 6/239 useless extension candidates. Maximal degree in co-relation 1539. Up to 741 conditions per place. [2023-11-06 23:14:16,076 INFO L140 encePairwiseOnDemand]: 678/682 looper letters, 31 selfloop transitions, 20 changer transitions 0/53 dead transitions. [2023-11-06 23:14:16,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 53 transitions, 273 flow [2023-11-06 23:14:16,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 23:14:16,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 23:14:16,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3285 transitions. [2023-11-06 23:14:16,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013929618768328 [2023-11-06 23:14:16,088 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3285 transitions. [2023-11-06 23:14:16,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3285 transitions. [2023-11-06 23:14:16,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:14:16,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3285 transitions. [2023-11-06 23:14:16,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 273.75) internal successors, (3285), 12 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:16,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:16,115 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:16,116 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 123 flow. Second operand 12 states and 3285 transitions. [2023-11-06 23:14:16,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 53 transitions, 273 flow [2023-11-06 23:14:16,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 53 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:14:16,119 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 244 flow [2023-11-06 23:14:16,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=244, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2023-11-06 23:14:16,120 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 12 predicate places. [2023-11-06 23:14:16,120 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 244 flow [2023-11-06 23:14:16,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 270.0) internal successors, (3240), 12 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:16,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:14:16,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 23:14:16,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:14:16,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:14:16,333 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-06 23:14:16,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:14:16,334 INFO L85 PathProgramCache]: Analyzing trace with hash -648824837, now seen corresponding path program 1 times [2023-11-06 23:14:16,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:14:16,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080713191] [2023-11-06 23:14:16,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:14:16,334 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 [2023-11-06 23:14:16,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:14:16,335 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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) [2023-11-06 23:14:16,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:14:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:14:16,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 23:14:16,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:14:16,420 INFO L351 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 0 case distinctions, treesize of input 16 treesize of output 7 [2023-11-06 23:14:16,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:14:16,443 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:14:16,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:14:16,450 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:14:16,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:14:16,456 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:14:16,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:14:16,465 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:14:16,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:14:16,471 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:14:16,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:14:16,493 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:14:16,493 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:14:16,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080713191] [2023-11-06 23:14:16,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1080713191] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:14:16,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:14:16,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:14:16,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539262029] [2023-11-06 23:14:16,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:14:16,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:14:16,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:14:16,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:14:16,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:14:16,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 682 [2023-11-06 23:14:16,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 244 flow. Second operand has 4 states, 4 states have (on average 254.25) internal successors, (1017), 4 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:16,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:14:16,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 682 [2023-11-06 23:14:16,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:14:17,429 INFO L124 PetriNetUnfolderBase]: 300/443 cut-off events. [2023-11-06 23:14:17,430 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-11-06 23:14:17,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 975 conditions, 443 events. 300/443 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 1791 event pairs, 134 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 954. Up to 426 conditions per place. [2023-11-06 23:14:17,433 INFO L140 encePairwiseOnDemand]: 674/682 looper letters, 34 selfloop transitions, 11 changer transitions 0/47 dead transitions. [2023-11-06 23:14:17,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 47 transitions, 322 flow [2023-11-06 23:14:17,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:14:17,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:14:17,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1044 transitions. [2023-11-06 23:14:17,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38269794721407624 [2023-11-06 23:14:17,438 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1044 transitions. [2023-11-06 23:14:17,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1044 transitions. [2023-11-06 23:14:17,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:14:17,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1044 transitions. [2023-11-06 23:14:17,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:17,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 682.0) internal successors, (3410), 5 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:17,447 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 682.0) internal successors, (3410), 5 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:17,448 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 244 flow. Second operand 4 states and 1044 transitions. [2023-11-06 23:14:17,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 47 transitions, 322 flow [2023-11-06 23:14:17,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 47 transitions, 266 flow, removed 20 selfloop flow, removed 5 redundant places. [2023-11-06 23:14:17,451 INFO L231 Difference]: Finished difference. Result has 56 places, 47 transitions, 198 flow [2023-11-06 23:14:17,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=56, PETRI_TRANSITIONS=47} [2023-11-06 23:14:17,452 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 4 predicate places. [2023-11-06 23:14:17,452 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 47 transitions, 198 flow [2023-11-06 23:14:17,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 254.25) internal successors, (1017), 4 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:17,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:14:17,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 23:14:17,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:14:17,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:14:17,664 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-06 23:14:17,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:14:17,664 INFO L85 PathProgramCache]: Analyzing trace with hash -648824839, now seen corresponding path program 1 times [2023-11-06 23:14:17,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:14:17,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701478655] [2023-11-06 23:14:17,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:14:17,665 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 [2023-11-06 23:14:17,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:14:17,666 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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) [2023-11-06 23:14:17,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:14:17,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:14:17,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:14:17,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:14:17,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:14:17,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:14:18,017 INFO L351 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 35 treesize of output 31 [2023-11-06 23:14:18,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:14:18,142 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:14:18,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701478655] [2023-11-06 23:14:18,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701478655] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:14:18,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:14:18,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-06 23:14:18,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000391465] [2023-11-06 23:14:18,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:14:18,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:14:18,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:14:18,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:14:18,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:14:21,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 682 [2023-11-06 23:14:21,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 198 flow. Second operand has 8 states, 8 states have (on average 267.25) internal successors, (2138), 8 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:21,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:14:21,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 682 [2023-11-06 23:14:21,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:14:22,858 INFO L124 PetriNetUnfolderBase]: 365/561 cut-off events. [2023-11-06 23:14:22,858 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-11-06 23:14:22,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1196 conditions, 561 events. 365/561 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 2595 event pairs, 68 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 1175. Up to 348 conditions per place. [2023-11-06 23:14:22,862 INFO L140 encePairwiseOnDemand]: 677/682 looper letters, 51 selfloop transitions, 14 changer transitions 0/67 dead transitions. [2023-11-06 23:14:22,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 67 transitions, 371 flow [2023-11-06 23:14:22,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:14:22,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:14:22,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1646 transitions. [2023-11-06 23:14:22,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4022482893450635 [2023-11-06 23:14:22,869 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1646 transitions. [2023-11-06 23:14:22,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1646 transitions. [2023-11-06 23:14:22,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:14:22,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1646 transitions. [2023-11-06 23:14:22,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 274.3333333333333) internal successors, (1646), 6 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) [2023-11-06 23:14:22,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 682.0) internal successors, (4774), 7 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:22,882 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 682.0) internal successors, (4774), 7 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:22,882 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 198 flow. Second operand 6 states and 1646 transitions. [2023-11-06 23:14:22,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 67 transitions, 371 flow [2023-11-06 23:14:22,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 67 transitions, 359 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:14:22,885 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 231 flow [2023-11-06 23:14:22,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=231, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2023-11-06 23:14:22,886 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 8 predicate places. [2023-11-06 23:14:22,886 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 231 flow [2023-11-06 23:14:22,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 267.25) internal successors, (2138), 8 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:22,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:14:22,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:14:22,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:14:23,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:14:23,099 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-06 23:14:23,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:14:23,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1361267731, now seen corresponding path program 1 times [2023-11-06 23:14:23,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:14:23,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927542766] [2023-11-06 23:14:23,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:14:23,100 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 [2023-11-06 23:14:23,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:14:23,101 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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) [2023-11-06 23:14:23,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:14:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:14:23,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 23:14:23,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:14:23,242 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 23:14:23,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:14:23,261 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:14:23,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:14:23,272 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:14:23,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:14:23,288 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:14:23,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:14:23,309 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:14:23,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:14:23,334 INFO L351 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 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:14:23,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:14:23,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:14:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:14:24,263 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:14:24,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927542766] [2023-11-06 23:14:24,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [927542766] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:14:24,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:14:24,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-06 23:14:24,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983449166] [2023-11-06 23:14:24,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:14:24,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:14:24,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:14:24,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:14:24,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:14:31,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 682 [2023-11-06 23:14:31,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 231 flow. Second operand has 8 states, 8 states have (on average 266.5) internal successors, (2132), 8 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:31,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:14:31,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 682 [2023-11-06 23:14:31,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:14:34,599 INFO L124 PetriNetUnfolderBase]: 454/750 cut-off events. [2023-11-06 23:14:34,599 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2023-11-06 23:14:34,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1728 conditions, 750 events. 454/750 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 3630 event pairs, 252 based on Foata normal form. 0/438 useless extension candidates. Maximal degree in co-relation 1706. Up to 524 conditions per place. [2023-11-06 23:14:34,603 INFO L140 encePairwiseOnDemand]: 668/682 looper letters, 63 selfloop transitions, 9 changer transitions 0/74 dead transitions. [2023-11-06 23:14:34,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 74 transitions, 445 flow [2023-11-06 23:14:34,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:14:34,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 23:14:34,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2197 transitions. [2023-11-06 23:14:34,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40267595307917886 [2023-11-06 23:14:34,610 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2197 transitions. [2023-11-06 23:14:34,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2197 transitions. [2023-11-06 23:14:34,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:14:34,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2197 transitions. [2023-11-06 23:14:34,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 274.625) internal successors, (2197), 8 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:34,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 682.0) internal successors, (6138), 9 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:34,621 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 682.0) internal successors, (6138), 9 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:34,621 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 231 flow. Second operand 8 states and 2197 transitions. [2023-11-06 23:14:34,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 74 transitions, 445 flow [2023-11-06 23:14:34,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 74 transitions, 436 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 23:14:34,624 INFO L231 Difference]: Finished difference. Result has 66 places, 48 transitions, 285 flow [2023-11-06 23:14:34,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=285, PETRI_PLACES=66, PETRI_TRANSITIONS=48} [2023-11-06 23:14:34,625 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 14 predicate places. [2023-11-06 23:14:34,625 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 48 transitions, 285 flow [2023-11-06 23:14:34,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 266.5) internal successors, (2132), 8 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:34,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:14:34,626 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-11-06 23:14:34,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:14:34,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:14:34,828 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-06 23:14:34,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:14:34,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1142497476, now seen corresponding path program 2 times [2023-11-06 23:14:34,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:14:34,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721809475] [2023-11-06 23:14:34,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:14:34,829 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 [2023-11-06 23:14:34,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:14:34,830 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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) [2023-11-06 23:14:34,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:14:34,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 23:14:34,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:14:34,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 23:14:34,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:14:34,936 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 23:14:34,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:14:34,951 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:14:34,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:14:34,975 INFO L351 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 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:14:34,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:14:34,988 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:14:34,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:14:34,997 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:14:35,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:14:35,007 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:14:35,180 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 23:14:35,180 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:14:35,180 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:14:35,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721809475] [2023-11-06 23:14:35,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721809475] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:14:35,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:14:35,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:14:35,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638734436] [2023-11-06 23:14:35,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:14:35,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:14:35,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:14:35,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:14:35,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:14:35,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 682 [2023-11-06 23:14:35,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 48 transitions, 285 flow. Second operand has 4 states, 4 states have (on average 273.5) internal successors, (1094), 4 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:35,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:14:35,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 682 [2023-11-06 23:14:35,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:14:36,630 INFO L124 PetriNetUnfolderBase]: 185/347 cut-off events. [2023-11-06 23:14:36,630 INFO L125 PetriNetUnfolderBase]: For 223/223 co-relation queries the response was YES. [2023-11-06 23:14:36,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 832 conditions, 347 events. 185/347 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1524 event pairs, 93 based on Foata normal form. 24/290 useless extension candidates. Maximal degree in co-relation 808. Up to 322 conditions per place. [2023-11-06 23:14:36,632 INFO L140 encePairwiseOnDemand]: 670/682 looper letters, 25 selfloop transitions, 11 changer transitions 0/38 dead transitions. [2023-11-06 23:14:36,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 38 transitions, 295 flow [2023-11-06 23:14:36,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:14:36,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:14:36,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1114 transitions. [2023-11-06 23:14:36,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083577712609971 [2023-11-06 23:14:36,637 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1114 transitions. [2023-11-06 23:14:36,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1114 transitions. [2023-11-06 23:14:36,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:14:36,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1114 transitions. [2023-11-06 23:14:36,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 278.5) internal successors, (1114), 4 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:36,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 682.0) internal successors, (3410), 5 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:36,645 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 682.0) internal successors, (3410), 5 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:36,645 INFO L175 Difference]: Start difference. First operand has 66 places, 48 transitions, 285 flow. Second operand 4 states and 1114 transitions. [2023-11-06 23:14:36,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 38 transitions, 295 flow [2023-11-06 23:14:36,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 38 transitions, 261 flow, removed 4 selfloop flow, removed 10 redundant places. [2023-11-06 23:14:36,648 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 211 flow [2023-11-06 23:14:36,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=211, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2023-11-06 23:14:36,649 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -3 predicate places. [2023-11-06 23:14:36,649 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 211 flow [2023-11-06 23:14:36,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 273.5) internal successors, (1094), 4 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:36,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:14:36,650 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-11-06 23:14:36,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:14:36,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:14:36,860 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-06 23:14:36,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:14:36,861 INFO L85 PathProgramCache]: Analyzing trace with hash -441382477, now seen corresponding path program 3 times [2023-11-06 23:14:36,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:14:36,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438958934] [2023-11-06 23:14:36,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:14:36,861 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 [2023-11-06 23:14:36,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:14:36,862 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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) [2023-11-06 23:14:36,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:14:37,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-06 23:14:37,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:14:37,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 23:14:37,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:14:37,102 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 23:14:37,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:14:37,126 INFO L351 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 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:14:37,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:14:37,141 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:14:37,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:14:37,148 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:14:37,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:14:37,156 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:14:37,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:14:37,167 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:14:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:14:37,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:14:41,011 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:14:41,012 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:14:41,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [438958934] [2023-11-06 23:14:41,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [438958934] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:14:41,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:14:41,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-11-06 23:14:41,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563097121] [2023-11-06 23:14:41,012 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:14:41,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 23:14:41,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:14:41,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 23:14:41,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-11-06 23:15:15,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 682 [2023-11-06 23:15:15,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 211 flow. Second operand has 24 states, 24 states have (on average 270.0) internal successors, (6480), 24 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:15,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:15:15,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 682 [2023-11-06 23:15:15,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:15:32,786 INFO L124 PetriNetUnfolderBase]: 197/371 cut-off events. [2023-11-06 23:15:32,786 INFO L125 PetriNetUnfolderBase]: For 408/408 co-relation queries the response was YES. [2023-11-06 23:15:32,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 930 conditions, 371 events. 197/371 cut-off events. For 408/408 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1569 event pairs, 93 based on Foata normal form. 12/302 useless extension candidates. Maximal degree in co-relation 911. Up to 338 conditions per place. [2023-11-06 23:15:32,789 INFO L140 encePairwiseOnDemand]: 678/682 looper letters, 16 selfloop transitions, 44 changer transitions 0/62 dead transitions. [2023-11-06 23:15:32,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 62 transitions, 499 flow [2023-11-06 23:15:32,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 23:15:32,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 23:15:32,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 6527 transitions. [2023-11-06 23:15:32,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3987658846529814 [2023-11-06 23:15:32,812 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 6527 transitions. [2023-11-06 23:15:32,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 6527 transitions. [2023-11-06 23:15:32,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:15:32,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 6527 transitions. [2023-11-06 23:15:32,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 271.9583333333333) internal successors, (6527), 24 states have internal predecessors, (6527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:32,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 682.0) internal successors, (17050), 25 states have internal predecessors, (17050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:32,854 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 682.0) internal successors, (17050), 25 states have internal predecessors, (17050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:32,854 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 211 flow. Second operand 24 states and 6527 transitions. [2023-11-06 23:15:32,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 62 transitions, 499 flow [2023-11-06 23:15:32,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 62 transitions, 475 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:15:32,860 INFO L231 Difference]: Finished difference. Result has 82 places, 62 transitions, 507 flow [2023-11-06 23:15:32,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=507, PETRI_PLACES=82, PETRI_TRANSITIONS=62} [2023-11-06 23:15:32,861 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 30 predicate places. [2023-11-06 23:15:32,861 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 62 transitions, 507 flow [2023-11-06 23:15:32,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 270.0) internal successors, (6480), 24 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:32,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:15:32,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:15:32,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-11-06 23:15:33,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:15:33,076 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-06 23:15:33,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:15:33,076 INFO L85 PathProgramCache]: Analyzing trace with hash -498075546, now seen corresponding path program 1 times [2023-11-06 23:15:33,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:15:33,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1773900671] [2023-11-06 23:15:33,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:15:33,077 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 [2023-11-06 23:15:33,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:15:33,079 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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) [2023-11-06 23:15:33,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:15:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:15:33,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:15:33,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:15:33,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:15:33,293 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:15:33,293 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:15:33,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1773900671] [2023-11-06 23:15:33,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1773900671] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:15:33,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:15:33,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:15:33,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422491743] [2023-11-06 23:15:33,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:15:33,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:15:33,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:15:33,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:15:33,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:15:33,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 682 [2023-11-06 23:15:33,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 62 transitions, 507 flow. Second operand has 5 states, 5 states have (on average 264.0) internal successors, (1320), 5 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:33,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:15:33,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 682 [2023-11-06 23:15:33,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:15:34,141 INFO L124 PetriNetUnfolderBase]: 233/440 cut-off events. [2023-11-06 23:15:34,142 INFO L125 PetriNetUnfolderBase]: For 216/216 co-relation queries the response was YES. [2023-11-06 23:15:34,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1182 conditions, 440 events. 233/440 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1715 event pairs, 72 based on Foata normal form. 0/398 useless extension candidates. Maximal degree in co-relation 1151. Up to 264 conditions per place. [2023-11-06 23:15:34,145 INFO L140 encePairwiseOnDemand]: 676/682 looper letters, 78 selfloop transitions, 5 changer transitions 0/83 dead transitions. [2023-11-06 23:15:34,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 83 transitions, 720 flow [2023-11-06 23:15:34,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:15:34,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:15:34,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1346 transitions. [2023-11-06 23:15:34,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3947214076246334 [2023-11-06 23:15:34,150 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1346 transitions. [2023-11-06 23:15:34,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1346 transitions. [2023-11-06 23:15:34,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:15:34,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1346 transitions. [2023-11-06 23:15:34,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 269.2) internal successors, (1346), 5 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:34,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:34,157 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:34,157 INFO L175 Difference]: Start difference. First operand has 82 places, 62 transitions, 507 flow. Second operand 5 states and 1346 transitions. [2023-11-06 23:15:34,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 83 transitions, 720 flow [2023-11-06 23:15:34,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 83 transitions, 604 flow, removed 38 selfloop flow, removed 11 redundant places. [2023-11-06 23:15:34,165 INFO L231 Difference]: Finished difference. Result has 78 places, 65 transitions, 423 flow [2023-11-06 23:15:34,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=423, PETRI_PLACES=78, PETRI_TRANSITIONS=65} [2023-11-06 23:15:34,165 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 26 predicate places. [2023-11-06 23:15:34,166 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 65 transitions, 423 flow [2023-11-06 23:15:34,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 264.0) internal successors, (1320), 5 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:34,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:15:34,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:15:34,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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)] Ended with exit code 0 [2023-11-06 23:15:34,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:15:34,380 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-06 23:15:34,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:15:34,381 INFO L85 PathProgramCache]: Analyzing trace with hash 515266600, now seen corresponding path program 2 times [2023-11-06 23:15:34,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:15:34,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2119472783] [2023-11-06 23:15:34,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:15:34,381 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 [2023-11-06 23:15:34,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:15:34,382 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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) [2023-11-06 23:15:34,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:15:34,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 23:15:34,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:15:34,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:15:34,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:15:34,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:15:34,564 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:15:34,564 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:15:34,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2119472783] [2023-11-06 23:15:34,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2119472783] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:15:34,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:15:34,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:15:34,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15535850] [2023-11-06 23:15:34,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:15:34,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:15:34,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:15:34,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:15:34,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:15:34,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 682 [2023-11-06 23:15:34,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 65 transitions, 423 flow. Second operand has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:34,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:15:34,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 682 [2023-11-06 23:15:34,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:15:35,278 INFO L124 PetriNetUnfolderBase]: 350/659 cut-off events. [2023-11-06 23:15:35,278 INFO L125 PetriNetUnfolderBase]: For 665/665 co-relation queries the response was YES. [2023-11-06 23:15:35,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2069 conditions, 659 events. 350/659 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2904 event pairs, 126 based on Foata normal form. 6/581 useless extension candidates. Maximal degree in co-relation 2036. Up to 432 conditions per place. [2023-11-06 23:15:35,282 INFO L140 encePairwiseOnDemand]: 676/682 looper letters, 80 selfloop transitions, 7 changer transitions 0/87 dead transitions. [2023-11-06 23:15:35,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 87 transitions, 685 flow [2023-11-06 23:15:35,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:15:35,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:15:35,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1357 transitions. [2023-11-06 23:15:35,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39794721407624634 [2023-11-06 23:15:35,286 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1357 transitions. [2023-11-06 23:15:35,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1357 transitions. [2023-11-06 23:15:35,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:15:35,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1357 transitions. [2023-11-06 23:15:35,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 271.4) internal successors, (1357), 5 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:35,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:35,292 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:35,292 INFO L175 Difference]: Start difference. First operand has 78 places, 65 transitions, 423 flow. Second operand 5 states and 1357 transitions. [2023-11-06 23:15:35,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 87 transitions, 685 flow [2023-11-06 23:15:35,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 87 transitions, 642 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-06 23:15:35,299 INFO L231 Difference]: Finished difference. Result has 83 places, 69 transitions, 443 flow [2023-11-06 23:15:35,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=443, PETRI_PLACES=83, PETRI_TRANSITIONS=69} [2023-11-06 23:15:35,299 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 31 predicate places. [2023-11-06 23:15:35,300 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 69 transitions, 443 flow [2023-11-06 23:15:35,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:35,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:15:35,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:15:35,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-11-06 23:15:35,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:15:35,508 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-06 23:15:35,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:15:35,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1784685612, now seen corresponding path program 3 times [2023-11-06 23:15:35,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:15:35,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638195787] [2023-11-06 23:15:35,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:15:35,509 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 [2023-11-06 23:15:35,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:15:35,510 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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) [2023-11-06 23:15:35,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-06 23:15:35,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-06 23:15:35,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:15:35,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:15:35,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:15:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:15:35,702 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:15:35,702 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:15:35,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638195787] [2023-11-06 23:15:35,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638195787] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:15:35,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:15:35,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:15:35,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503950437] [2023-11-06 23:15:35,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:15:35,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:15:35,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:15:35,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:15:35,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:15:35,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 682 [2023-11-06 23:15:35,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 69 transitions, 443 flow. Second operand has 5 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:35,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:15:35,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 682 [2023-11-06 23:15:35,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:15:36,686 INFO L124 PetriNetUnfolderBase]: 380/707 cut-off events. [2023-11-06 23:15:36,687 INFO L125 PetriNetUnfolderBase]: For 1244/1244 co-relation queries the response was YES. [2023-11-06 23:15:36,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2596 conditions, 707 events. 380/707 cut-off events. For 1244/1244 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3164 event pairs, 132 based on Foata normal form. 12/677 useless extension candidates. Maximal degree in co-relation 2560. Up to 396 conditions per place. [2023-11-06 23:15:36,692 INFO L140 encePairwiseOnDemand]: 676/682 looper letters, 80 selfloop transitions, 12 changer transitions 0/92 dead transitions. [2023-11-06 23:15:36,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 92 transitions, 727 flow [2023-11-06 23:15:36,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:15:36,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:15:36,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1342 transitions. [2023-11-06 23:15:36,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2023-11-06 23:15:36,696 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1342 transitions. [2023-11-06 23:15:36,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1342 transitions. [2023-11-06 23:15:36,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:15:36,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1342 transitions. [2023-11-06 23:15:36,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 268.4) internal successors, (1342), 5 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:36,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:36,703 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:36,703 INFO L175 Difference]: Start difference. First operand has 83 places, 69 transitions, 443 flow. Second operand 5 states and 1342 transitions. [2023-11-06 23:15:36,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 92 transitions, 727 flow [2023-11-06 23:15:36,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 92 transitions, 703 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-11-06 23:15:36,709 INFO L231 Difference]: Finished difference. Result has 89 places, 75 transitions, 523 flow [2023-11-06 23:15:36,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=523, PETRI_PLACES=89, PETRI_TRANSITIONS=75} [2023-11-06 23:15:36,710 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 37 predicate places. [2023-11-06 23:15:36,710 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 75 transitions, 523 flow [2023-11-06 23:15:36,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:36,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:15:36,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:15:36,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-11-06 23:15:36,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:15:36,911 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-06 23:15:36,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:15:36,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1420877608, now seen corresponding path program 4 times [2023-11-06 23:15:36,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:15:36,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037236893] [2023-11-06 23:15:36,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:15:36,912 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 [2023-11-06 23:15:36,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:15:36,913 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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) [2023-11-06 23:15:36,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-06 23:15:37,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:15:37,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:15:37,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:15:37,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:15:37,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:15:37,130 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:15:37,130 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:15:37,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037236893] [2023-11-06 23:15:37,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037236893] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:15:37,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:15:37,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:15:37,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084753289] [2023-11-06 23:15:37,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:15:37,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:15:37,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:15:37,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:15:37,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:15:37,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 682 [2023-11-06 23:15:37,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 75 transitions, 523 flow. Second operand has 5 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:37,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:15:37,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 682 [2023-11-06 23:15:37,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:15:37,932 INFO L124 PetriNetUnfolderBase]: 368/695 cut-off events. [2023-11-06 23:15:37,932 INFO L125 PetriNetUnfolderBase]: For 1946/1946 co-relation queries the response was YES. [2023-11-06 23:15:37,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2779 conditions, 695 events. 368/695 cut-off events. For 1946/1946 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3140 event pairs, 150 based on Foata normal form. 12/665 useless extension candidates. Maximal degree in co-relation 2740. Up to 564 conditions per place. [2023-11-06 23:15:37,937 INFO L140 encePairwiseOnDemand]: 676/682 looper letters, 75 selfloop transitions, 15 changer transitions 0/90 dead transitions. [2023-11-06 23:15:37,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 90 transitions, 782 flow [2023-11-06 23:15:37,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:15:37,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:15:37,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1336 transitions. [2023-11-06 23:15:37,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39178885630498533 [2023-11-06 23:15:37,940 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1336 transitions. [2023-11-06 23:15:37,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1336 transitions. [2023-11-06 23:15:37,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:15:37,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1336 transitions. [2023-11-06 23:15:37,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 267.2) internal successors, (1336), 5 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:37,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:37,945 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:37,945 INFO L175 Difference]: Start difference. First operand has 89 places, 75 transitions, 523 flow. Second operand 5 states and 1336 transitions. [2023-11-06 23:15:37,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 90 transitions, 782 flow [2023-11-06 23:15:37,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 90 transitions, 769 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-06 23:15:37,955 INFO L231 Difference]: Finished difference. Result has 94 places, 81 transitions, 617 flow [2023-11-06 23:15:37,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=617, PETRI_PLACES=94, PETRI_TRANSITIONS=81} [2023-11-06 23:15:37,956 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 42 predicate places. [2023-11-06 23:15:37,956 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 81 transitions, 617 flow [2023-11-06 23:15:37,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:37,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:15:37,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:15:37,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-11-06 23:15:38,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:15:38,164 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-06 23:15:38,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:15:38,164 INFO L85 PathProgramCache]: Analyzing trace with hash 240562606, now seen corresponding path program 5 times [2023-11-06 23:15:38,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:15:38,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719456901] [2023-11-06 23:15:38,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:15:38,165 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 [2023-11-06 23:15:38,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:15:38,166 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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) [2023-11-06 23:15:38,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-11-06 23:15:38,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:15:38,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:15:38,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:15:38,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:15:38,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:15:38,387 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:15:38,387 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:15:38,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719456901] [2023-11-06 23:15:38,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719456901] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:15:38,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:15:38,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:15:38,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287712761] [2023-11-06 23:15:38,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:15:38,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:15:38,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:15:38,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:15:38,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:15:38,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 682 [2023-11-06 23:15:38,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 81 transitions, 617 flow. Second operand has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:38,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:15:38,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 682 [2023-11-06 23:15:38,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:15:39,188 INFO L124 PetriNetUnfolderBase]: 371/704 cut-off events. [2023-11-06 23:15:39,188 INFO L125 PetriNetUnfolderBase]: For 2180/2180 co-relation queries the response was YES. [2023-11-06 23:15:39,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3117 conditions, 704 events. 371/704 cut-off events. For 2180/2180 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3229 event pairs, 114 based on Foata normal form. 6/668 useless extension candidates. Maximal degree in co-relation 3076. Up to 402 conditions per place. [2023-11-06 23:15:39,192 INFO L140 encePairwiseOnDemand]: 676/682 looper letters, 81 selfloop transitions, 14 changer transitions 0/95 dead transitions. [2023-11-06 23:15:39,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 95 transitions, 850 flow [2023-11-06 23:15:39,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:15:39,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:15:39,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1360 transitions. [2023-11-06 23:15:39,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39882697947214074 [2023-11-06 23:15:39,194 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1360 transitions. [2023-11-06 23:15:39,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1360 transitions. [2023-11-06 23:15:39,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:15:39,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1360 transitions. [2023-11-06 23:15:39,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:39,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:39,199 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:39,199 INFO L175 Difference]: Start difference. First operand has 94 places, 81 transitions, 617 flow. Second operand 5 states and 1360 transitions. [2023-11-06 23:15:39,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 95 transitions, 850 flow [2023-11-06 23:15:39,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 95 transitions, 796 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-11-06 23:15:39,213 INFO L231 Difference]: Finished difference. Result has 97 places, 82 transitions, 604 flow [2023-11-06 23:15:39,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=604, PETRI_PLACES=97, PETRI_TRANSITIONS=82} [2023-11-06 23:15:39,214 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 45 predicate places. [2023-11-06 23:15:39,214 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 82 transitions, 604 flow [2023-11-06 23:15:39,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:39,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:15:39,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:15:39,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-11-06 23:15:39,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:15:39,428 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-06 23:15:39,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:15:39,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1135882108, now seen corresponding path program 6 times [2023-11-06 23:15:39,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:15:39,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864968537] [2023-11-06 23:15:39,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:15:39,429 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 [2023-11-06 23:15:39,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:15:39,430 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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) [2023-11-06 23:15:39,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-11-06 23:15:39,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-06 23:15:39,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:15:39,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:15:39,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:15:39,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:15:39,619 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:15:39,619 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:15:39,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864968537] [2023-11-06 23:15:39,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864968537] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:15:39,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:15:39,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:15:39,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533990996] [2023-11-06 23:15:39,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:15:39,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:15:39,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:15:39,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:15:39,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:15:39,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 682 [2023-11-06 23:15:39,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 82 transitions, 604 flow. Second operand has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:39,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:15:39,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 682 [2023-11-06 23:15:39,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:15:40,512 INFO L124 PetriNetUnfolderBase]: 368/683 cut-off events. [2023-11-06 23:15:40,512 INFO L125 PetriNetUnfolderBase]: For 2285/2285 co-relation queries the response was YES. [2023-11-06 23:15:40,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2926 conditions, 683 events. 368/683 cut-off events. For 2285/2285 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2969 event pairs, 147 based on Foata normal form. 6/647 useless extension candidates. Maximal degree in co-relation 2884. Up to 543 conditions per place. [2023-11-06 23:15:40,517 INFO L140 encePairwiseOnDemand]: 676/682 looper letters, 77 selfloop transitions, 15 changer transitions 0/92 dead transitions. [2023-11-06 23:15:40,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 92 transitions, 823 flow [2023-11-06 23:15:40,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:15:40,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:15:40,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1356 transitions. [2023-11-06 23:15:40,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976539589442815 [2023-11-06 23:15:40,521 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1356 transitions. [2023-11-06 23:15:40,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1356 transitions. [2023-11-06 23:15:40,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:15:40,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1356 transitions. [2023-11-06 23:15:40,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 271.2) internal successors, (1356), 5 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:40,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:40,528 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:40,529 INFO L175 Difference]: Start difference. First operand has 97 places, 82 transitions, 604 flow. Second operand 5 states and 1356 transitions. [2023-11-06 23:15:40,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 92 transitions, 823 flow [2023-11-06 23:15:40,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 92 transitions, 789 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-06 23:15:40,541 INFO L231 Difference]: Finished difference. Result has 99 places, 83 transitions, 617 flow [2023-11-06 23:15:40,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=617, PETRI_PLACES=99, PETRI_TRANSITIONS=83} [2023-11-06 23:15:40,542 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 47 predicate places. [2023-11-06 23:15:40,543 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 83 transitions, 617 flow [2023-11-06 23:15:40,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:40,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:15:40,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:15:40,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-11-06 23:15:40,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:15:40,756 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-06 23:15:40,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:15:40,756 INFO L85 PathProgramCache]: Analyzing trace with hash 758719477, now seen corresponding path program 1 times [2023-11-06 23:15:40,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:15:40,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244966397] [2023-11-06 23:15:40,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:15:40,757 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 [2023-11-06 23:15:40,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:15:40,758 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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) [2023-11-06 23:15:40,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-11-06 23:15:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:15:40,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 23:15:40,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:15:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:15:40,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:15:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:15:41,171 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:15:41,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244966397] [2023-11-06 23:15:41,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244966397] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:15:41,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:15:41,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-06 23:15:41,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315657874] [2023-11-06 23:15:41,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:15:41,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:15:41,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:15:41,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:15:41,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:15:41,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 682 [2023-11-06 23:15:41,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 83 transitions, 617 flow. Second operand has 10 states, 10 states have (on average 260.1) internal successors, (2601), 10 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:41,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:15:41,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 682 [2023-11-06 23:15:41,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:15:45,049 INFO L124 PetriNetUnfolderBase]: 1004/1751 cut-off events. [2023-11-06 23:15:45,049 INFO L125 PetriNetUnfolderBase]: For 4436/4436 co-relation queries the response was YES. [2023-11-06 23:15:45,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6509 conditions, 1751 events. 1004/1751 cut-off events. For 4436/4436 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9336 event pairs, 102 based on Foata normal form. 0/1481 useless extension candidates. Maximal degree in co-relation 6466. Up to 733 conditions per place. [2023-11-06 23:15:45,062 INFO L140 encePairwiseOnDemand]: 676/682 looper letters, 123 selfloop transitions, 53 changer transitions 0/176 dead transitions. [2023-11-06 23:15:45,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 176 transitions, 1419 flow [2023-11-06 23:15:45,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 23:15:45,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 23:15:45,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4239 transitions. [2023-11-06 23:15:45,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38847140762463345 [2023-11-06 23:15:45,071 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4239 transitions. [2023-11-06 23:15:45,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4239 transitions. [2023-11-06 23:15:45,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:15:45,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4239 transitions. [2023-11-06 23:15:45,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 264.9375) internal successors, (4239), 16 states have internal predecessors, (4239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:45,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 682.0) internal successors, (11594), 17 states have internal predecessors, (11594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:45,093 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 682.0) internal successors, (11594), 17 states have internal predecessors, (11594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:45,093 INFO L175 Difference]: Start difference. First operand has 99 places, 83 transitions, 617 flow. Second operand 16 states and 4239 transitions. [2023-11-06 23:15:45,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 176 transitions, 1419 flow [2023-11-06 23:15:45,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 176 transitions, 1387 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-06 23:15:45,116 INFO L231 Difference]: Finished difference. Result has 115 places, 118 transitions, 998 flow [2023-11-06 23:15:45,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=998, PETRI_PLACES=115, PETRI_TRANSITIONS=118} [2023-11-06 23:15:45,117 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 63 predicate places. [2023-11-06 23:15:45,117 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 118 transitions, 998 flow [2023-11-06 23:15:45,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 260.1) internal successors, (2601), 10 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:45,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:15:45,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:15:45,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2023-11-06 23:15:45,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:15:45,332 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-06 23:15:45,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:15:45,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1652178265, now seen corresponding path program 2 times [2023-11-06 23:15:45,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:15:45,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81830226] [2023-11-06 23:15:45,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:15:45,333 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 [2023-11-06 23:15:45,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:15:45,334 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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) [2023-11-06 23:15:45,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-11-06 23:15:45,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:15:45,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:15:45,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 23:15:45,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:15:45,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:15:45,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:15:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:15:45,904 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:15:45,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81830226] [2023-11-06 23:15:45,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81830226] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:15:45,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:15:45,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-06 23:15:45,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996261394] [2023-11-06 23:15:45,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:15:45,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:15:45,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:15:45,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:15:45,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:15:46,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 682 [2023-11-06 23:15:46,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 118 transitions, 998 flow. Second operand has 10 states, 10 states have (on average 258.6) internal successors, (2586), 10 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:46,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:15:46,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 682 [2023-11-06 23:15:46,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:15:49,079 INFO L124 PetriNetUnfolderBase]: 1307/2342 cut-off events. [2023-11-06 23:15:49,079 INFO L125 PetriNetUnfolderBase]: For 9866/9866 co-relation queries the response was YES. [2023-11-06 23:15:49,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10725 conditions, 2342 events. 1307/2342 cut-off events. For 9866/9866 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13784 event pairs, 228 based on Foata normal form. 12/2048 useless extension candidates. Maximal degree in co-relation 10678. Up to 973 conditions per place. [2023-11-06 23:15:49,098 INFO L140 encePairwiseOnDemand]: 676/682 looper letters, 179 selfloop transitions, 46 changer transitions 0/225 dead transitions. [2023-11-06 23:15:49,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 225 transitions, 2000 flow [2023-11-06 23:15:49,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 23:15:49,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 23:15:49,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3416 transitions. [2023-11-06 23:15:49,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3852921272276111 [2023-11-06 23:15:49,107 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3416 transitions. [2023-11-06 23:15:49,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3416 transitions. [2023-11-06 23:15:49,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:15:49,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3416 transitions. [2023-11-06 23:15:49,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 262.7692307692308) internal successors, (3416), 13 states have internal predecessors, (3416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:49,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:49,124 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:49,124 INFO L175 Difference]: Start difference. First operand has 115 places, 118 transitions, 998 flow. Second operand 13 states and 3416 transitions. [2023-11-06 23:15:49,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 225 transitions, 2000 flow [2023-11-06 23:15:49,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 225 transitions, 1666 flow, removed 136 selfloop flow, removed 5 redundant places. [2023-11-06 23:15:49,180 INFO L231 Difference]: Finished difference. Result has 130 places, 133 transitions, 1089 flow [2023-11-06 23:15:49,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1089, PETRI_PLACES=130, PETRI_TRANSITIONS=133} [2023-11-06 23:15:49,181 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 78 predicate places. [2023-11-06 23:15:49,181 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 133 transitions, 1089 flow [2023-11-06 23:15:49,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 258.6) internal successors, (2586), 10 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:15:49,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:15:49,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:15:49,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-11-06 23:15:49,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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 [2023-11-06 23:15:49,397 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-06 23:15:49,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:15:49,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1090207243, now seen corresponding path program 3 times [2023-11-06 23:15:49,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:15:49,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278320487] [2023-11-06 23:15:49,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:15:49,398 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:15:49,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:15:49,399 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/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) [2023-11-06 23:15:49,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f784f3-20d7-4a66-9b80-8f46df531c0e/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-11-06 23:15:49,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 23:15:49,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:15:49,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 23:15:49,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:15:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:15:49,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:15:49,880 INFO L351 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 64 treesize of output 62 [2023-11-06 23:15:49,885 INFO L351 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 62 treesize of output 60 [2023-11-06 23:15:50,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:15:50,155 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:15:50,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278320487] [2023-11-06 23:15:50,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278320487] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:15:50,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:15:50,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-06 23:15:50,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760372094] [2023-11-06 23:15:50,156 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:15:50,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:15:50,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:15:50,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:15:50,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90