./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/test-context1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/test-context1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx --witnessprinter.witness.filename witness --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 d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:22:02,646 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:22:02,773 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 22:22:02,781 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:22:02,782 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:22:02,823 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:22:02,824 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:22:02,825 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:22:02,826 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:22:02,831 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:22:02,833 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:22:02,834 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:22:02,834 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:22:02,836 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:22:02,837 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:22:02,837 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:22:02,837 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:22:02,838 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:22:02,838 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:22:02,839 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:22:02,839 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:22:02,840 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:22:02,840 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:22:02,841 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:22:02,841 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:22:02,842 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:22:02,843 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:22:02,843 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:22:02,844 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:22:02,844 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:22:02,845 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:22:02,845 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:22:02,846 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:22:02,846 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:22:02,846 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:22:02,846 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:22:02,847 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:22:02,847 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:22:02,847 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:22:02,847 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_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e [2023-11-21 22:22:03,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:22:03,216 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:22:03,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:22:03,221 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:22:03,222 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:22:03,223 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/weaver/test-context1.wvr.c [2023-11-21 22:22:06,304 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:22:06,544 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:22:06,545 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/sv-benchmarks/c/weaver/test-context1.wvr.c [2023-11-21 22:22:06,558 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/data/3d46b1d8f/af0b5599904049beab14922c723c46a7/FLAGc27bff18f [2023-11-21 22:22:06,574 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/data/3d46b1d8f/af0b5599904049beab14922c723c46a7 [2023-11-21 22:22:06,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:22:06,578 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:22:06,579 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:22:06,580 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:22:06,591 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:22:06,592 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:22:06" (1/1) ... [2023-11-21 22:22:06,593 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b34029a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:06, skipping insertion in model container [2023-11-21 22:22:06,593 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:22:06" (1/1) ... [2023-11-21 22:22:06,620 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:22:06,816 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:22:06,828 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) [2023-11-21 22:22:06,829 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@12c75d67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:06, skipping insertion in model container [2023-11-21 22:22:06,829 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:22:06,830 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-21 22:22:06,832 INFO L158 Benchmark]: Toolchain (without parser) took 252.79ms. Allocated memory is still 142.6MB. Free memory was 105.0MB in the beginning and 95.3MB in the end (delta: 9.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-21 22:22:06,833 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 142.6MB. Free memory is still 91.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 22:22:06,834 INFO L158 Benchmark]: CACSL2BoogieTranslator took 250.17ms. Allocated memory is still 142.6MB. Free memory was 105.0MB in the beginning and 95.3MB in the end (delta: 9.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-21 22:22:06,835 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 142.6MB. Free memory is still 91.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 250.17ms. Allocated memory is still 142.6MB. Free memory was 105.0MB in the beginning and 95.3MB in the end (delta: 9.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 94]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/test-context1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx --witnessprinter.witness.filename witness --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 d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:22:09,445 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:22:09,542 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-21 22:22:09,551 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:22:09,552 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:22:09,605 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:22:09,606 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:22:09,607 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:22:09,608 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:22:09,614 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:22:09,615 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:22:09,615 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:22:09,616 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:22:09,618 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:22:09,618 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:22:09,619 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:22:09,619 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:22:09,620 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:22:09,620 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:22:09,621 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:22:09,621 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:22:09,622 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:22:09,622 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:22:09,623 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-21 22:22:09,623 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-21 22:22:09,623 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:22:09,624 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:22:09,624 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:22:09,625 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:22:09,626 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:22:09,627 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:22:09,628 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:22:09,628 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:22:09,629 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:22:09,629 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:22:09,629 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-21 22:22:09,629 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-21 22:22:09,630 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:22:09,630 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:22:09,631 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:22:09,631 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:22:09,632 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-21 22:22:09,632 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_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e [2023-11-21 22:22:10,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:22:10,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:22:10,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:22:10,076 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:22:10,076 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:22:10,079 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/weaver/test-context1.wvr.c [2023-11-21 22:22:13,207 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:22:13,515 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:22:13,516 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/sv-benchmarks/c/weaver/test-context1.wvr.c [2023-11-21 22:22:13,525 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/data/32ecc0ea9/0886ddedfa094941951809ec807e8fbb/FLAGc8b254d22 [2023-11-21 22:22:13,546 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/data/32ecc0ea9/0886ddedfa094941951809ec807e8fbb [2023-11-21 22:22:13,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:22:13,556 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:22:13,562 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:22:13,562 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:22:13,569 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:22:13,573 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:22:13" (1/1) ... [2023-11-21 22:22:13,574 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54da47be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:13, skipping insertion in model container [2023-11-21 22:22:13,574 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:22:13" (1/1) ... [2023-11-21 22:22:13,611 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:22:13,912 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:22:13,937 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-21 22:22:13,953 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:22:13,995 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:22:14,009 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:22:14,060 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:22:14,073 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:22:14,074 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:22:14,083 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:22:14,084 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:14 WrapperNode [2023-11-21 22:22:14,084 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:22:14,086 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:22:14,086 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:22:14,086 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:22:14,095 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:14" (1/1) ... [2023-11-21 22:22:14,110 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:14" (1/1) ... [2023-11-21 22:22:14,172 INFO L138 Inliner]: procedures = 26, calls = 35, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 137 [2023-11-21 22:22:14,172 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:22:14,173 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:22:14,174 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:22:14,175 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:22:14,203 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:14" (1/1) ... [2023-11-21 22:22:14,204 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:14" (1/1) ... [2023-11-21 22:22:14,231 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:14" (1/1) ... [2023-11-21 22:22:14,231 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:14" (1/1) ... [2023-11-21 22:22:14,258 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:14" (1/1) ... [2023-11-21 22:22:14,263 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:14" (1/1) ... [2023-11-21 22:22:14,266 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:14" (1/1) ... [2023-11-21 22:22:14,268 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:14" (1/1) ... [2023-11-21 22:22:14,282 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:22:14,284 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:22:14,284 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:22:14,284 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:22:14,286 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:14" (1/1) ... [2023-11-21 22:22:14,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:22:14,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:22:14,335 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:22:14,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:22:14,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:22:14,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-21 22:22:14,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:22:14,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-21 22:22:14,399 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-21 22:22:14,400 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-21 22:22:14,400 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-21 22:22:14,400 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-21 22:22:14,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-21 22:22:14,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-21 22:22:14,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 22:22:14,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:22:14,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:22:14,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:22:14,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-21 22:22:14,408 WARN L212 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 22:22:14,549 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:22:14,552 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:22:15,285 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:22:15,642 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:22:15,642 INFO L308 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-21 22:22:15,645 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:22:15 BoogieIcfgContainer [2023-11-21 22:22:15,645 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:22:15,648 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:22:15,649 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:22:15,654 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:22:15,655 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:22:13" (1/3) ... [2023-11-21 22:22:15,656 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc73144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:22:15, skipping insertion in model container [2023-11-21 22:22:15,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:14" (2/3) ... [2023-11-21 22:22:15,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc73144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:22:15, skipping insertion in model container [2023-11-21 22:22:15,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:22:15" (3/3) ... [2023-11-21 22:22:15,659 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2023-11-21 22:22:15,708 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:22:15,708 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-11-21 22:22:15,709 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 22:22:15,807 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-21 22:22:15,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 50 transitions, 114 flow [2023-11-21 22:22:15,909 INFO L124 PetriNetUnfolderBase]: 5/48 cut-off events. [2023-11-21 22:22:15,909 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-21 22:22:15,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 48 events. 5/48 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 88 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2023-11-21 22:22:15,919 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 50 transitions, 114 flow [2023-11-21 22:22:15,925 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 47 transitions, 106 flow [2023-11-21 22:22:15,944 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:22:15,956 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;@3035d784, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:22:15,956 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-11-21 22:22:15,962 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 22:22:15,962 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-21 22:22:15,962 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:22:15,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:22:15,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 22:22:15,964 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 22:22:15,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:22:15,970 INFO L85 PathProgramCache]: Analyzing trace with hash 446589, now seen corresponding path program 1 times [2023-11-21 22:22:15,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:22:15,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227776166] [2023-11-21 22:22:15,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:22:15,987 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 [2023-11-21 22:22:15,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:22:15,989 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:22:16,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:22:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:16,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 22:22:16,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:22:16,255 INFO L378 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 [2023-11-21 22:22:16,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:16,273 INFO L378 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 [2023-11-21 22:22:16,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:16,296 INFO L378 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 [2023-11-21 22:22:16,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:16,319 INFO L378 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 [2023-11-21 22:22:16,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:16,332 INFO L378 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 [2023-11-21 22:22:16,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:16,343 INFO L378 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 [2023-11-21 22:22:16,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:22:16,355 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:22:16,356 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:22:16,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227776166] [2023-11-21 22:22:16,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1227776166] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:22:16,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:22:16,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:22:16,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237880915] [2023-11-21 22:22:16,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:22:16,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:22:16,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:22:16,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:22:16,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:22:16,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 50 [2023-11-21 22:22:16,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:16,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:22:16,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 50 [2023-11-21 22:22:16,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:22:16,728 INFO L124 PetriNetUnfolderBase]: 187/402 cut-off events. [2023-11-21 22:22:16,728 INFO L125 PetriNetUnfolderBase]: For 32/35 co-relation queries the response was YES. [2023-11-21 22:22:16,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 737 conditions, 402 events. 187/402 cut-off events. For 32/35 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1998 event pairs, 128 based on Foata normal form. 54/286 useless extension candidates. Maximal degree in co-relation 646. Up to 305 conditions per place. [2023-11-21 22:22:16,736 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 21 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-11-21 22:22:16,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 42 transitions, 142 flow [2023-11-21 22:22:16,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:22:16,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:22:16,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2023-11-21 22:22:16,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2023-11-21 22:22:16,753 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 93 transitions. [2023-11-21 22:22:16,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 93 transitions. [2023-11-21 22:22:16,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:22:16,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 93 transitions. [2023-11-21 22:22:16,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:16,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:16,764 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:16,766 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 106 flow. Second operand 3 states and 93 transitions. [2023-11-21 22:22:16,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 42 transitions, 142 flow [2023-11-21 22:22:16,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 42 transitions, 134 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-21 22:22:16,779 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 92 flow [2023-11-21 22:22:16,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2023-11-21 22:22:16,786 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-11-21 22:22:16,787 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 92 flow [2023-11-21 22:22:16,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:16,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:22:16,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 22:22:16,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:22:16,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:22:16,992 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 22:22:16,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:22:16,993 INFO L85 PathProgramCache]: Analyzing trace with hash 446590, now seen corresponding path program 1 times [2023-11-21 22:22:16,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:22:16,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2039251349] [2023-11-21 22:22:16,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:22:16,995 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:22:16,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:22:16,996 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:22:17,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:22:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:17,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 22:22:17,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:22:17,110 INFO L378 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 [2023-11-21 22:22:17,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:17,137 INFO L378 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 [2023-11-21 22:22:17,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:17,160 INFO L378 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 [2023-11-21 22:22:17,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:17,195 INFO L378 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 [2023-11-21 22:22:17,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:17,217 INFO L378 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 [2023-11-21 22:22:17,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:17,243 INFO L378 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 [2023-11-21 22:22:17,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:22:17,348 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:22:17,349 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:22:17,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2039251349] [2023-11-21 22:22:17,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2039251349] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:22:17,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:22:17,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:22:17,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317983648] [2023-11-21 22:22:17,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:22:17,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:22:17,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:22:17,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:22:17,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:22:17,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 50 [2023-11-21 22:22:17,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:17,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:22:17,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 50 [2023-11-21 22:22:17,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:22:17,879 INFO L124 PetriNetUnfolderBase]: 188/405 cut-off events. [2023-11-21 22:22:17,880 INFO L125 PetriNetUnfolderBase]: For 8/11 co-relation queries the response was YES. [2023-11-21 22:22:17,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 730 conditions, 405 events. 188/405 cut-off events. For 8/11 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2017 event pairs, 128 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 708. Up to 310 conditions per place. [2023-11-21 22:22:17,889 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 23 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2023-11-21 22:22:17,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 154 flow [2023-11-21 22:22:17,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:22:17,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:22:17,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2023-11-21 22:22:17,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2023-11-21 22:22:17,896 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 116 transitions. [2023-11-21 22:22:17,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 116 transitions. [2023-11-21 22:22:17,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:22:17,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 116 transitions. [2023-11-21 22:22:17,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:17,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:17,903 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:17,903 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 92 flow. Second operand 4 states and 116 transitions. [2023-11-21 22:22:17,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 154 flow [2023-11-21 22:22:17,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 148 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:22:17,908 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 115 flow [2023-11-21 22:22:17,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, 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=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-11-21 22:22:17,909 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2023-11-21 22:22:17,910 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 115 flow [2023-11-21 22:22:17,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:17,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:22:17,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 22:22:17,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:22:18,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:22:18,114 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 22:22:18,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:22:18,115 INFO L85 PathProgramCache]: Analyzing trace with hash 446624, now seen corresponding path program 1 times [2023-11-21 22:22:18,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:22:18,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [299842043] [2023-11-21 22:22:18,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:22:18,116 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 [2023-11-21 22:22:18,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:22:18,118 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:22:18,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:22:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:18,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 22:22:18,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:22:18,242 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 22:22:18,243 INFO L378 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 [2023-11-21 22:22:18,291 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-21 22:22:18,292 INFO L378 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 [2023-11-21 22:22:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:22:18,402 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:22:18,403 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:22:18,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [299842043] [2023-11-21 22:22:18,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [299842043] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:22:18,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:22:18,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:22:18,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261038881] [2023-11-21 22:22:18,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:22:18,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:22:18,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:22:18,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:22:18,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:22:18,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2023-11-21 22:22:18,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:18,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:22:18,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2023-11-21 22:22:18,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:22:18,722 INFO L124 PetriNetUnfolderBase]: 300/554 cut-off events. [2023-11-21 22:22:18,723 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-21 22:22:18,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1050 conditions, 554 events. 300/554 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2646 event pairs, 212 based on Foata normal form. 0/345 useless extension candidates. Maximal degree in co-relation 1026. Up to 472 conditions per place. [2023-11-21 22:22:18,731 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 27 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-11-21 22:22:18,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 167 flow [2023-11-21 22:22:18,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:22:18,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:22:18,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2023-11-21 22:22:18,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2023-11-21 22:22:18,735 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 84 transitions. [2023-11-21 22:22:18,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 84 transitions. [2023-11-21 22:22:18,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:22:18,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 84 transitions. [2023-11-21 22:22:18,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:18,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:18,738 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:18,738 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 115 flow. Second operand 3 states and 84 transitions. [2023-11-21 22:22:18,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 167 flow [2023-11-21 22:22:18,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:22:18,741 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 110 flow [2023-11-21 22:22:18,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2023-11-21 22:22:18,742 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2023-11-21 22:22:18,743 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 110 flow [2023-11-21 22:22:18,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:18,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:22:18,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 22:22:18,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:22:18,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:22:18,961 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 22:22:18,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:22:18,962 INFO L85 PathProgramCache]: Analyzing trace with hash 446625, now seen corresponding path program 1 times [2023-11-21 22:22:18,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:22:18,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980232539] [2023-11-21 22:22:18,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:22:18,963 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 [2023-11-21 22:22:18,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:22:18,965 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:22:18,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:22:19,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:19,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 22:22:19,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:22:19,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:19,095 INFO L378 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 5 [2023-11-21 22:22:19,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:19,114 INFO L378 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 5 treesize of output 3 [2023-11-21 22:22:19,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:19,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:19,152 INFO L378 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 5 [2023-11-21 22:22:19,167 INFO L378 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 [2023-11-21 22:22:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:22:19,229 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:22:19,229 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:22:19,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980232539] [2023-11-21 22:22:19,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980232539] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:22:19,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:22:19,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:22:19,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507763888] [2023-11-21 22:22:19,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:22:19,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:22:19,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:22:19,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:22:19,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:22:19,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2023-11-21 22:22:19,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:19,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:22:19,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2023-11-21 22:22:19,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:22:19,494 INFO L124 PetriNetUnfolderBase]: 188/385 cut-off events. [2023-11-21 22:22:19,495 INFO L125 PetriNetUnfolderBase]: For 8/11 co-relation queries the response was YES. [2023-11-21 22:22:19,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 718 conditions, 385 events. 188/385 cut-off events. For 8/11 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1814 event pairs, 128 based on Foata normal form. 50/285 useless extension candidates. Maximal degree in co-relation 709. Up to 310 conditions per place. [2023-11-21 22:22:19,500 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 25 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-11-21 22:22:19,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 41 transitions, 158 flow [2023-11-21 22:22:19,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:22:19,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:22:19,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-11-21 22:22:19,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2023-11-21 22:22:19,504 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-11-21 22:22:19,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-11-21 22:22:19,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:22:19,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-11-21 22:22:19,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:19,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:19,509 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:19,509 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 110 flow. Second operand 3 states and 88 transitions. [2023-11-21 22:22:19,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 41 transitions, 158 flow [2023-11-21 22:22:19,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:22:19,512 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 107 flow [2023-11-21 22:22:19,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=43, 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=107, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-11-21 22:22:19,515 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -4 predicate places. [2023-11-21 22:22:19,515 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 107 flow [2023-11-21 22:22:19,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:19,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:22:19,516 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-21 22:22:19,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:22:19,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:22:19,719 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 22:22:19,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:22:19,720 INFO L85 PathProgramCache]: Analyzing trace with hash 429186169, now seen corresponding path program 1 times [2023-11-21 22:22:19,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:22:19,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955136465] [2023-11-21 22:22:19,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:22:19,721 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 [2023-11-21 22:22:19,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:22:19,722 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:22:19,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:22:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:19,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 22:22:19,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:22:19,821 INFO L378 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 [2023-11-21 22:22:19,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:19,841 INFO L378 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 [2023-11-21 22:22:19,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:19,853 INFO L378 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 [2023-11-21 22:22:19,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:19,867 INFO L378 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 [2023-11-21 22:22:19,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:19,901 INFO L378 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 [2023-11-21 22:22:19,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:19,923 INFO L378 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 [2023-11-21 22:22:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:22:20,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:22:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:22:20,674 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:22:20,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955136465] [2023-11-21 22:22:20,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955136465] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:22:20,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:22:20,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-21 22:22:20,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052696317] [2023-11-21 22:22:20,676 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:22:20,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 22:22:20,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:22:20,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 22:22:20,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:22:21,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 50 [2023-11-21 22:22:21,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 107 flow. Second operand has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:21,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:22:21,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 50 [2023-11-21 22:22:21,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:22:22,472 INFO L124 PetriNetUnfolderBase]: 191/394 cut-off events. [2023-11-21 22:22:22,472 INFO L125 PetriNetUnfolderBase]: For 8/11 co-relation queries the response was YES. [2023-11-21 22:22:22,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 747 conditions, 394 events. 191/394 cut-off events. For 8/11 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1859 event pairs, 128 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 737. Up to 313 conditions per place. [2023-11-21 22:22:22,476 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 23 selfloop transitions, 13 changer transitions 0/50 dead transitions. [2023-11-21 22:22:22,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 50 transitions, 215 flow [2023-11-21 22:22:22,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 22:22:22,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-21 22:22:22,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2023-11-21 22:22:22,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.518 [2023-11-21 22:22:22,480 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 259 transitions. [2023-11-21 22:22:22,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 259 transitions. [2023-11-21 22:22:22,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:22:22,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 259 transitions. [2023-11-21 22:22:22,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 25.9) internal successors, (259), 10 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:22,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 50.0) internal successors, (550), 11 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:22,485 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 50.0) internal successors, (550), 11 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:22,486 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 107 flow. Second operand 10 states and 259 transitions. [2023-11-21 22:22:22,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 50 transitions, 215 flow [2023-11-21 22:22:22,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 50 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:22:22,489 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 186 flow [2023-11-21 22:22:22,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=186, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2023-11-21 22:22:22,490 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 7 predicate places. [2023-11-21 22:22:22,491 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 186 flow [2023-11-21 22:22:22,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:22,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:22:22,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-21 22:22:22,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:22:22,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:22:22,694 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 22:22:22,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:22:22,695 INFO L85 PathProgramCache]: Analyzing trace with hash 420883858, now seen corresponding path program 1 times [2023-11-21 22:22:22,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:22:22,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190639862] [2023-11-21 22:22:22,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:22:22,696 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 [2023-11-21 22:22:22,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:22:22,697 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:22:22,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:22:22,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:22,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 22:22:22,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:22:22,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:22,807 INFO L378 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 [2023-11-21 22:22:22,817 INFO L378 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 5 [2023-11-21 22:22:22,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:22,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:22,836 INFO L378 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 [2023-11-21 22:22:22,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:22,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:22,850 INFO L378 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 [2023-11-21 22:22:22,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:22:22,883 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:22:22,884 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:22:22,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190639862] [2023-11-21 22:22:22,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190639862] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:22:22,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:22:22,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:22:22,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093982191] [2023-11-21 22:22:22,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:22:22,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:22:22,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:22:22,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:22:22,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:22:22,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2023-11-21 22:22:22,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:22,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:22:22,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2023-11-21 22:22:22,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:22:23,108 INFO L124 PetriNetUnfolderBase]: 191/384 cut-off events. [2023-11-21 22:22:23,109 INFO L125 PetriNetUnfolderBase]: For 17/20 co-relation queries the response was YES. [2023-11-21 22:22:23,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 761 conditions, 384 events. 191/384 cut-off events. For 17/20 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1789 event pairs, 128 based on Foata normal form. 14/258 useless extension candidates. Maximal degree in co-relation 747. Up to 319 conditions per place. [2023-11-21 22:22:23,113 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 34 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-11-21 22:22:23,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 48 transitions, 252 flow [2023-11-21 22:22:23,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:22:23,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:22:23,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-11-21 22:22:23,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2023-11-21 22:22:23,115 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-11-21 22:22:23,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-11-21 22:22:23,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:22:23,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-11-21 22:22:23,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:23,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:23,117 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:23,118 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 186 flow. Second operand 3 states and 88 transitions. [2023-11-21 22:22:23,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 48 transitions, 252 flow [2023-11-21 22:22:23,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 48 transitions, 222 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-11-21 22:22:23,126 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 154 flow [2023-11-21 22:22:23,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2023-11-21 22:22:23,131 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2023-11-21 22:22:23,131 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 154 flow [2023-11-21 22:22:23,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:23,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:22:23,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-21 22:22:23,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:22:23,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:22:23,334 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 22:22:23,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:22:23,335 INFO L85 PathProgramCache]: Analyzing trace with hash 420883857, now seen corresponding path program 1 times [2023-11-21 22:22:23,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:22:23,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615096643] [2023-11-21 22:22:23,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:22:23,336 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 [2023-11-21 22:22:23,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:22:23,338 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:22:23,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:22:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:23,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 22:22:23,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:22:23,465 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 22:22:23,466 INFO L378 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 [2023-11-21 22:22:23,492 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 22:22:23,492 INFO L378 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 [2023-11-21 22:22:23,523 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 22:22:23,523 INFO L378 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 [2023-11-21 22:22:23,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:22:23,649 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:22:23,650 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:22:23,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1615096643] [2023-11-21 22:22:23,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1615096643] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:22:23,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:22:23,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:22:23,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549887286] [2023-11-21 22:22:23,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:22:23,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:22:23,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:22:23,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:22:23,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:22:23,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2023-11-21 22:22:23,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:23,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:22:23,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2023-11-21 22:22:23,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:22:23,890 INFO L124 PetriNetUnfolderBase]: 207/395 cut-off events. [2023-11-21 22:22:23,890 INFO L125 PetriNetUnfolderBase]: For 13/16 co-relation queries the response was YES. [2023-11-21 22:22:23,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 395 events. 207/395 cut-off events. For 13/16 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1796 event pairs, 140 based on Foata normal form. 0/256 useless extension candidates. Maximal degree in co-relation 774. Up to 349 conditions per place. [2023-11-21 22:22:23,895 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 36 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-11-21 22:22:23,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 46 transitions, 224 flow [2023-11-21 22:22:23,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:22:23,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:22:23,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2023-11-21 22:22:23,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2023-11-21 22:22:23,897 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 84 transitions. [2023-11-21 22:22:23,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 84 transitions. [2023-11-21 22:22:23,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:22:23,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 84 transitions. [2023-11-21 22:22:23,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:23,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:23,899 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:23,899 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 154 flow. Second operand 3 states and 84 transitions. [2023-11-21 22:22:23,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 46 transitions, 224 flow [2023-11-21 22:22:23,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 46 transitions, 223 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:22:23,902 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 151 flow [2023-11-21 22:22:23,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2023-11-21 22:22:23,903 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-11-21 22:22:23,903 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 151 flow [2023-11-21 22:22:23,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:23,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:22:23,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:22:23,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:22:24,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:22:24,107 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 22:22:24,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:22:24,107 INFO L85 PathProgramCache]: Analyzing trace with hash 742732928, now seen corresponding path program 1 times [2023-11-21 22:22:24,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:22:24,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313040617] [2023-11-21 22:22:24,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:22:24,108 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 [2023-11-21 22:22:24,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:22:24,110 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:22:24,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:22:24,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:24,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 22:22:24,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:22:24,202 INFO L378 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 [2023-11-21 22:22:24,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:24,225 INFO L378 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 [2023-11-21 22:22:24,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:24,237 INFO L378 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 [2023-11-21 22:22:24,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:24,243 INFO L378 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 [2023-11-21 22:22:24,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:24,252 INFO L378 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 [2023-11-21 22:22:24,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:24,262 INFO L378 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 [2023-11-21 22:22:24,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:22:24,290 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:22:24,291 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:22:24,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313040617] [2023-11-21 22:22:24,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313040617] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:22:24,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:22:24,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:22:24,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117840202] [2023-11-21 22:22:24,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:22:24,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:22:24,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:22:24,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:22:24,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:22:24,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 50 [2023-11-21 22:22:24,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 151 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:24,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:22:24,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 50 [2023-11-21 22:22:24,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:22:24,563 INFO L124 PetriNetUnfolderBase]: 146/296 cut-off events. [2023-11-21 22:22:24,563 INFO L125 PetriNetUnfolderBase]: For 13/16 co-relation queries the response was YES. [2023-11-21 22:22:24,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 296 events. 146/296 cut-off events. For 13/16 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1276 event pairs, 91 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 570. Up to 234 conditions per place. [2023-11-21 22:22:24,566 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 27 selfloop transitions, 6 changer transitions 0/44 dead transitions. [2023-11-21 22:22:24,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 44 transitions, 213 flow [2023-11-21 22:22:24,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:22:24,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:22:24,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2023-11-21 22:22:24,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.555 [2023-11-21 22:22:24,568 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 111 transitions. [2023-11-21 22:22:24,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 111 transitions. [2023-11-21 22:22:24,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:22:24,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 111 transitions. [2023-11-21 22:22:24,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:24,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:24,570 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:24,571 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 151 flow. Second operand 4 states and 111 transitions. [2023-11-21 22:22:24,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 44 transitions, 213 flow [2023-11-21 22:22:24,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 44 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:22:24,573 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 158 flow [2023-11-21 22:22:24,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2023-11-21 22:22:24,574 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-11-21 22:22:24,575 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 158 flow [2023-11-21 22:22:24,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:24,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:22:24,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:22:24,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-11-21 22:22:24,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:22:24,778 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 22:22:24,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:22:24,778 INFO L85 PathProgramCache]: Analyzing trace with hash 742732929, now seen corresponding path program 1 times [2023-11-21 22:22:24,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:22:24,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911101829] [2023-11-21 22:22:24,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:22:24,779 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 [2023-11-21 22:22:24,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:22:24,780 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:22:24,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:22:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:24,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-21 22:22:24,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:22:24,900 INFO L378 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 [2023-11-21 22:22:24,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:24,920 INFO L378 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 [2023-11-21 22:22:24,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:24,942 INFO L378 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 [2023-11-21 22:22:24,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:24,956 INFO L378 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 [2023-11-21 22:22:24,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:24,982 INFO L378 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 [2023-11-21 22:22:25,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:25,001 INFO L378 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 [2023-11-21 22:22:25,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:22:25,207 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:22:25,207 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:22:25,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911101829] [2023-11-21 22:22:25,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911101829] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:22:25,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:22:25,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:22:25,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958865028] [2023-11-21 22:22:25,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:22:25,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:22:25,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:22:25,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:22:25,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:22:25,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 50 [2023-11-21 22:22:25,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:25,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:22:25,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 50 [2023-11-21 22:22:25,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:22:25,572 INFO L124 PetriNetUnfolderBase]: 174/373 cut-off events. [2023-11-21 22:22:25,572 INFO L125 PetriNetUnfolderBase]: For 14/17 co-relation queries the response was YES. [2023-11-21 22:22:25,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 735 conditions, 373 events. 174/373 cut-off events. For 14/17 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1798 event pairs, 60 based on Foata normal form. 9/295 useless extension candidates. Maximal degree in co-relation 719. Up to 206 conditions per place. [2023-11-21 22:22:25,575 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 39 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2023-11-21 22:22:25,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 57 transitions, 279 flow [2023-11-21 22:22:25,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:22:25,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:22:25,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2023-11-21 22:22:25,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2023-11-21 22:22:25,578 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 129 transitions. [2023-11-21 22:22:25,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 129 transitions. [2023-11-21 22:22:25,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:22:25,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 129 transitions. [2023-11-21 22:22:25,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:25,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:25,580 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:25,580 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 158 flow. Second operand 4 states and 129 transitions. [2023-11-21 22:22:25,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 57 transitions, 279 flow [2023-11-21 22:22:25,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 57 transitions, 272 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:22:25,583 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 181 flow [2023-11-21 22:22:25,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2023-11-21 22:22:25,584 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 5 predicate places. [2023-11-21 22:22:25,585 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 181 flow [2023-11-21 22:22:25,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:25,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:22:25,585 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:22:25,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:22:25,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:22:25,787 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 22:22:25,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:22:25,788 INFO L85 PathProgramCache]: Analyzing trace with hash -914370231, now seen corresponding path program 1 times [2023-11-21 22:22:25,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:22:25,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [823411312] [2023-11-21 22:22:25,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:22:25,788 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 [2023-11-21 22:22:25,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:22:25,789 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:22:25,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:22:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:25,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-21 22:22:25,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:22:25,912 INFO L378 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 [2023-11-21 22:22:25,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:25,927 INFO L378 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 [2023-11-21 22:22:25,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:25,955 INFO L378 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 [2023-11-21 22:22:25,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:25,968 INFO L378 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 [2023-11-21 22:22:25,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:25,981 INFO L378 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 [2023-11-21 22:22:25,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:25,993 INFO L378 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 [2023-11-21 22:22:26,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:22:26,241 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:22:26,241 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:22:26,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [823411312] [2023-11-21 22:22:26,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [823411312] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:22:26,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:22:26,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:22:26,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839305562] [2023-11-21 22:22:26,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:22:26,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:22:26,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:22:26,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:22:26,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:22:26,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 50 [2023-11-21 22:22:26,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 181 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:26,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:22:26,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 50 [2023-11-21 22:22:26,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:22:26,687 INFO L124 PetriNetUnfolderBase]: 215/494 cut-off events. [2023-11-21 22:22:26,687 INFO L125 PetriNetUnfolderBase]: For 58/63 co-relation queries the response was YES. [2023-11-21 22:22:26,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1025 conditions, 494 events. 215/494 cut-off events. For 58/63 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2740 event pairs, 175 based on Foata normal form. 10/393 useless extension candidates. Maximal degree in co-relation 1008. Up to 307 conditions per place. [2023-11-21 22:22:26,691 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 42 selfloop transitions, 3 changer transitions 2/58 dead transitions. [2023-11-21 22:22:26,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 58 transitions, 305 flow [2023-11-21 22:22:26,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:22:26,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:22:26,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2023-11-21 22:22:26,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2023-11-21 22:22:26,693 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 130 transitions. [2023-11-21 22:22:26,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 130 transitions. [2023-11-21 22:22:26,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:22:26,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 130 transitions. [2023-11-21 22:22:26,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:26,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:26,695 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:26,696 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 181 flow. Second operand 4 states and 130 transitions. [2023-11-21 22:22:26,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 58 transitions, 305 flow [2023-11-21 22:22:26,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 297 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:22:26,699 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 182 flow [2023-11-21 22:22:26,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2023-11-21 22:22:26,700 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 7 predicate places. [2023-11-21 22:22:26,700 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 182 flow [2023-11-21 22:22:26,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:26,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:22:26,700 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-21 22:22:26,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:22:26,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:22:26,908 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 22:22:26,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:22:26,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1283936234, now seen corresponding path program 2 times [2023-11-21 22:22:26,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:22:26,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1157929366] [2023-11-21 22:22:26,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:22:26,909 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 [2023-11-21 22:22:26,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:22:26,910 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:22:26,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:22:27,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:22:27,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:22:27,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:22:27,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:22:27,030 INFO L378 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 [2023-11-21 22:22:27,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:27,045 INFO L378 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 [2023-11-21 22:22:27,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:27,055 INFO L378 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 [2023-11-21 22:22:27,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:27,068 INFO L378 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 [2023-11-21 22:22:27,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:27,097 INFO L378 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 [2023-11-21 22:22:27,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:27,110 INFO L378 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 [2023-11-21 22:22:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:22:27,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:22:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:22:28,372 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:22:28,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1157929366] [2023-11-21 22:22:28,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1157929366] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:22:28,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:22:28,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-21 22:22:28,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134938920] [2023-11-21 22:22:28,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:22:28,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-21 22:22:28,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:22:28,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-21 22:22:28,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-21 22:22:29,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 50 [2023-11-21 22:22:29,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 182 flow. Second operand has 14 states, 14 states have (on average 23.571428571428573) internal successors, (330), 14 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:29,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:22:29,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 50 [2023-11-21 22:22:29,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:22:33,438 INFO L124 PetriNetUnfolderBase]: 221/504 cut-off events. [2023-11-21 22:22:33,438 INFO L125 PetriNetUnfolderBase]: For 94/100 co-relation queries the response was YES. [2023-11-21 22:22:33,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 504 events. 221/504 cut-off events. For 94/100 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2771 event pairs, 175 based on Foata normal form. 6/397 useless extension candidates. Maximal degree in co-relation 1075. Up to 397 conditions per place. [2023-11-21 22:22:33,443 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 22 selfloop transitions, 31 changer transitions 0/63 dead transitions. [2023-11-21 22:22:33,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 63 transitions, 390 flow [2023-11-21 22:22:33,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-21 22:22:33,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-21 22:22:33,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 542 transitions. [2023-11-21 22:22:33,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49272727272727274 [2023-11-21 22:22:33,447 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 542 transitions. [2023-11-21 22:22:33,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 542 transitions. [2023-11-21 22:22:33,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:22:33,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 542 transitions. [2023-11-21 22:22:33,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 24.636363636363637) internal successors, (542), 22 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:33,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 50.0) internal successors, (1150), 23 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:33,454 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 50.0) internal successors, (1150), 23 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:33,454 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 182 flow. Second operand 22 states and 542 transitions. [2023-11-21 22:22:33,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 63 transitions, 390 flow [2023-11-21 22:22:33,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 63 transitions, 385 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:22:33,458 INFO L231 Difference]: Finished difference. Result has 81 places, 63 transitions, 371 flow [2023-11-21 22:22:33,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=371, PETRI_PLACES=81, PETRI_TRANSITIONS=63} [2023-11-21 22:22:33,459 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 32 predicate places. [2023-11-21 22:22:33,459 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 63 transitions, 371 flow [2023-11-21 22:22:33,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.571428571428573) internal successors, (330), 14 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:33,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:22:33,460 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:22:33,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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)] Ended with exit code 0 [2023-11-21 22:22:33,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:22:33,662 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 22:22:33,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:22:33,663 INFO L85 PathProgramCache]: Analyzing trace with hash -991186364, now seen corresponding path program 1 times [2023-11-21 22:22:33,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:22:33,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084121012] [2023-11-21 22:22:33,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:22:33,664 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 [2023-11-21 22:22:33,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:22:33,666 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:22:33,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:22:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:33,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-21 22:22:33,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:22:33,794 INFO L378 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 [2023-11-21 22:22:33,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:33,816 INFO L378 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 [2023-11-21 22:22:33,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:33,825 INFO L378 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 [2023-11-21 22:22:33,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:33,838 INFO L378 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 [2023-11-21 22:22:33,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:33,883 INFO L378 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 [2023-11-21 22:22:33,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:33,898 INFO L378 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 [2023-11-21 22:22:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:22:34,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:22:35,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:22:35,480 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:22:35,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084121012] [2023-11-21 22:22:35,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084121012] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:22:35,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:22:35,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-21 22:22:35,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610535062] [2023-11-21 22:22:35,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:22:35,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 22:22:35,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:22:35,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 22:22:35,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:22:36,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 50 [2023-11-21 22:22:36,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 63 transitions, 371 flow. Second operand has 8 states, 8 states have (on average 25.25) internal successors, (202), 8 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:36,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:22:36,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 50 [2023-11-21 22:22:36,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:22:39,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 22:22:41,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 22:22:43,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 22:22:43,679 INFO L124 PetriNetUnfolderBase]: 471/992 cut-off events. [2023-11-21 22:22:43,679 INFO L125 PetriNetUnfolderBase]: For 121/127 co-relation queries the response was YES. [2023-11-21 22:22:43,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2149 conditions, 992 events. 471/992 cut-off events. For 121/127 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5700 event pairs, 99 based on Foata normal form. 0/779 useless extension candidates. Maximal degree in co-relation 2125. Up to 228 conditions per place. [2023-11-21 22:22:43,688 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 89 selfloop transitions, 19 changer transitions 0/119 dead transitions. [2023-11-21 22:22:43,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 119 transitions, 727 flow [2023-11-21 22:22:43,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:22:43,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-21 22:22:43,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 243 transitions. [2023-11-21 22:22:43,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6942857142857143 [2023-11-21 22:22:43,692 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 243 transitions. [2023-11-21 22:22:43,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 243 transitions. [2023-11-21 22:22:43,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:22:43,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 243 transitions. [2023-11-21 22:22:43,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 34.714285714285715) internal successors, (243), 7 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:43,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 50.0) internal successors, (400), 8 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:43,695 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 50.0) internal successors, (400), 8 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:43,695 INFO L175 Difference]: Start difference. First operand has 81 places, 63 transitions, 371 flow. Second operand 7 states and 243 transitions. [2023-11-21 22:22:43,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 119 transitions, 727 flow [2023-11-21 22:22:43,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 119 transitions, 647 flow, removed 27 selfloop flow, removed 9 redundant places. [2023-11-21 22:22:43,702 INFO L231 Difference]: Finished difference. Result has 81 places, 69 transitions, 375 flow [2023-11-21 22:22:43,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=375, PETRI_PLACES=81, PETRI_TRANSITIONS=69} [2023-11-21 22:22:43,704 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 32 predicate places. [2023-11-21 22:22:43,704 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 69 transitions, 375 flow [2023-11-21 22:22:43,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 25.25) internal successors, (202), 8 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:43,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:22:43,705 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:22:43,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:22:43,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:22:43,908 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 22:22:43,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:22:43,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1026695322, now seen corresponding path program 1 times [2023-11-21 22:22:43,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:22:43,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1600144898] [2023-11-21 22:22:43,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:22:43,909 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 [2023-11-21 22:22:43,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:22:43,910 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:22:43,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:22:44,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:44,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 22:22:44,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:22:44,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:22:44,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:22:44,323 INFO L378 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 38 treesize of output 34 [2023-11-21 22:22:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:22:45,090 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:22:45,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1600144898] [2023-11-21 22:22:45,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1600144898] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:22:45,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:22:45,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-21 22:22:45,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114152806] [2023-11-21 22:22:45,091 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:22:45,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 22:22:45,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:22:45,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 22:22:45,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:22:45,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 50 [2023-11-21 22:22:45,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 69 transitions, 375 flow. Second operand has 10 states, 10 states have (on average 25.6) internal successors, (256), 10 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:45,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:22:45,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 50 [2023-11-21 22:22:45,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:22:48,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 22:22:50,007 INFO L124 PetriNetUnfolderBase]: 756/1579 cut-off events. [2023-11-21 22:22:50,008 INFO L125 PetriNetUnfolderBase]: For 1077/1083 co-relation queries the response was YES. [2023-11-21 22:22:50,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3826 conditions, 1579 events. 756/1579 cut-off events. For 1077/1083 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10039 event pairs, 131 based on Foata normal form. 71/1403 useless extension candidates. Maximal degree in co-relation 3799. Up to 273 conditions per place. [2023-11-21 22:22:50,022 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 144 selfloop transitions, 29 changer transitions 0/184 dead transitions. [2023-11-21 22:22:50,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 184 transitions, 1062 flow [2023-11-21 22:22:50,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 22:22:50,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-21 22:22:50,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 423 transitions. [2023-11-21 22:22:50,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.705 [2023-11-21 22:22:50,026 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 423 transitions. [2023-11-21 22:22:50,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 423 transitions. [2023-11-21 22:22:50,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:22:50,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 423 transitions. [2023-11-21 22:22:50,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 35.25) internal successors, (423), 12 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:50,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 50.0) internal successors, (650), 13 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:50,031 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 50.0) internal successors, (650), 13 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:50,031 INFO L175 Difference]: Start difference. First operand has 81 places, 69 transitions, 375 flow. Second operand 12 states and 423 transitions. [2023-11-21 22:22:50,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 184 transitions, 1062 flow [2023-11-21 22:22:50,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 184 transitions, 1026 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-21 22:22:50,040 INFO L231 Difference]: Finished difference. Result has 96 places, 79 transitions, 502 flow [2023-11-21 22:22:50,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=502, PETRI_PLACES=96, PETRI_TRANSITIONS=79} [2023-11-21 22:22:50,041 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 47 predicate places. [2023-11-21 22:22:50,041 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 79 transitions, 502 flow [2023-11-21 22:22:50,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 25.6) internal successors, (256), 10 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:50,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:22:50,042 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:22:50,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:22:50,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:22:50,245 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 22:22:50,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:22:50,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1026212745, now seen corresponding path program 1 times [2023-11-21 22:22:50,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:22:50,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1083429305] [2023-11-21 22:22:50,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:22:50,247 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 [2023-11-21 22:22:50,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:22:50,249 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:22:50,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:22:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:50,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 22:22:50,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:22:50,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 22:22:50,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:22:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 22:22:50,483 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:22:50,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1083429305] [2023-11-21 22:22:50,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1083429305] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:22:50,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:22:50,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-21 22:22:50,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444343693] [2023-11-21 22:22:50,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:22:50,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:22:50,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:22:50,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:22:50,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:22:50,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 50 [2023-11-21 22:22:50,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 79 transitions, 502 flow. Second operand has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:50,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:22:50,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 50 [2023-11-21 22:22:50,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:22:51,003 INFO L124 PetriNetUnfolderBase]: 858/1798 cut-off events. [2023-11-21 22:22:51,003 INFO L125 PetriNetUnfolderBase]: For 3169/3175 co-relation queries the response was YES. [2023-11-21 22:22:51,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4769 conditions, 1798 events. 858/1798 cut-off events. For 3169/3175 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 11630 event pairs, 289 based on Foata normal form. 40/1557 useless extension candidates. Maximal degree in co-relation 4735. Up to 838 conditions per place. [2023-11-21 22:22:51,069 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 87 selfloop transitions, 10 changer transitions 0/108 dead transitions. [2023-11-21 22:22:51,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 108 transitions, 807 flow [2023-11-21 22:22:51,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:22:51,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:22:51,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 145 transitions. [2023-11-21 22:22:51,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.725 [2023-11-21 22:22:51,071 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 145 transitions. [2023-11-21 22:22:51,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 145 transitions. [2023-11-21 22:22:51,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:22:51,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 145 transitions. [2023-11-21 22:22:51,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:51,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:51,074 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:51,074 INFO L175 Difference]: Start difference. First operand has 96 places, 79 transitions, 502 flow. Second operand 4 states and 145 transitions. [2023-11-21 22:22:51,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 108 transitions, 807 flow [2023-11-21 22:22:51,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 108 transitions, 765 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-11-21 22:22:51,088 INFO L231 Difference]: Finished difference. Result has 97 places, 81 transitions, 523 flow [2023-11-21 22:22:51,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=523, PETRI_PLACES=97, PETRI_TRANSITIONS=81} [2023-11-21 22:22:51,089 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 48 predicate places. [2023-11-21 22:22:51,089 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 81 transitions, 523 flow [2023-11-21 22:22:51,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:51,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:22:51,090 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:22:51,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:22:51,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:22:51,293 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 22:22:51,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:22:51,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1296421862, now seen corresponding path program 2 times [2023-11-21 22:22:51,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:22:51,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190361675] [2023-11-21 22:22:51,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:22:51,294 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 [2023-11-21 22:22:51,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:22:51,295 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:22:51,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:22:51,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-21 22:22:51,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:22:51,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-21 22:22:51,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:22:51,414 INFO L378 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 [2023-11-21 22:22:51,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:51,431 INFO L378 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 [2023-11-21 22:22:51,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:51,444 INFO L378 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 [2023-11-21 22:22:51,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:51,452 INFO L378 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 [2023-11-21 22:22:51,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:51,464 INFO L378 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 [2023-11-21 22:22:51,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:51,472 INFO L378 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 [2023-11-21 22:22:51,830 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-21 22:22:51,830 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:22:51,830 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:22:51,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190361675] [2023-11-21 22:22:51,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190361675] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:22:51,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:22:51,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:22:51,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674929228] [2023-11-21 22:22:51,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:22:51,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:22:51,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:22:51,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:22:51,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:22:51,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 50 [2023-11-21 22:22:51,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 81 transitions, 523 flow. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:51,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:22:51,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 50 [2023-11-21 22:22:52,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:22:52,446 INFO L124 PetriNetUnfolderBase]: 844/1754 cut-off events. [2023-11-21 22:22:52,447 INFO L125 PetriNetUnfolderBase]: For 3007/3013 co-relation queries the response was YES. [2023-11-21 22:22:52,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4807 conditions, 1754 events. 844/1754 cut-off events. For 3007/3013 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11344 event pairs, 446 based on Foata normal form. 10/1484 useless extension candidates. Maximal degree in co-relation 4770. Up to 911 conditions per place. [2023-11-21 22:22:52,466 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 65 selfloop transitions, 16 changer transitions 0/92 dead transitions. [2023-11-21 22:22:52,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 92 transitions, 719 flow [2023-11-21 22:22:52,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:22:52,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:22:52,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2023-11-21 22:22:52,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2023-11-21 22:22:52,468 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 126 transitions. [2023-11-21 22:22:52,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 126 transitions. [2023-11-21 22:22:52,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:22:52,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 126 transitions. [2023-11-21 22:22:52,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:52,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:52,471 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:52,471 INFO L175 Difference]: Start difference. First operand has 97 places, 81 transitions, 523 flow. Second operand 4 states and 126 transitions. [2023-11-21 22:22:52,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 92 transitions, 719 flow [2023-11-21 22:22:52,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 92 transitions, 715 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-21 22:22:52,484 INFO L231 Difference]: Finished difference. Result has 101 places, 81 transitions, 568 flow [2023-11-21 22:22:52,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=568, PETRI_PLACES=101, PETRI_TRANSITIONS=81} [2023-11-21 22:22:52,485 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 52 predicate places. [2023-11-21 22:22:52,485 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 81 transitions, 568 flow [2023-11-21 22:22:52,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:52,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:22:52,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:22:52,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-11-21 22:22:52,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:22:52,688 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 22:22:52,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:22:52,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1148339602, now seen corresponding path program 1 times [2023-11-21 22:22:52,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:22:52,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687187077] [2023-11-21 22:22:52,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:22:52,689 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 [2023-11-21 22:22:52,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:22:52,691 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:22:52,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:22:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:52,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:22:52,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:22:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:22:52,832 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:22:52,832 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:22:52,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687187077] [2023-11-21 22:22:52,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687187077] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:22:52,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:22:52,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:22:52,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845553775] [2023-11-21 22:22:52,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:22:52,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:22:52,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:22:52,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:22:52,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:22:52,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 50 [2023-11-21 22:22:52,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 81 transitions, 568 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:52,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:22:52,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 50 [2023-11-21 22:22:52,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:22:53,151 INFO L124 PetriNetUnfolderBase]: 844/1742 cut-off events. [2023-11-21 22:22:53,151 INFO L125 PetriNetUnfolderBase]: For 3284/3290 co-relation queries the response was YES. [2023-11-21 22:22:53,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4911 conditions, 1742 events. 844/1742 cut-off events. For 3284/3290 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11230 event pairs, 446 based on Foata normal form. 6/1468 useless extension candidates. Maximal degree in co-relation 4871. Up to 911 conditions per place. [2023-11-21 22:22:53,166 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 71 selfloop transitions, 5 changer transitions 4/91 dead transitions. [2023-11-21 22:22:53,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 91 transitions, 760 flow [2023-11-21 22:22:53,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:22:53,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:22:53,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2023-11-21 22:22:53,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2023-11-21 22:22:53,168 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 102 transitions. [2023-11-21 22:22:53,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 102 transitions. [2023-11-21 22:22:53,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:22:53,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 102 transitions. [2023-11-21 22:22:53,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:53,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:53,170 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:53,170 INFO L175 Difference]: Start difference. First operand has 101 places, 81 transitions, 568 flow. Second operand 3 states and 102 transitions. [2023-11-21 22:22:53,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 91 transitions, 760 flow [2023-11-21 22:22:53,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 91 transitions, 728 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-21 22:22:53,188 INFO L231 Difference]: Finished difference. Result has 101 places, 80 transitions, 543 flow [2023-11-21 22:22:53,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=543, PETRI_PLACES=101, PETRI_TRANSITIONS=80} [2023-11-21 22:22:53,189 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 52 predicate places. [2023-11-21 22:22:53,189 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 80 transitions, 543 flow [2023-11-21 22:22:53,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:53,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:22:53,190 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:22:53,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:22:53,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 22:22:53,392 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 22:22:53,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:22:53,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1818245334, now seen corresponding path program 1 times [2023-11-21 22:22:53,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 22:22:53,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1056285019] [2023-11-21 22:22:53,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:22:53,393 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 [2023-11-21 22:22:53,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 22:22:53,394 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 22:22:53,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acf665b5-4d49-4043-bd6a-8cd777c745f1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 22:22:53,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:53,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-21 22:22:53,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:22:53,557 INFO L378 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 [2023-11-21 22:22:53,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:53,575 INFO L378 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 [2023-11-21 22:22:53,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:53,588 INFO L378 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 [2023-11-21 22:22:53,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:53,603 INFO L378 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 [2023-11-21 22:22:53,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:53,611 INFO L378 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 [2023-11-21 22:22:53,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:22:53,621 INFO L378 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 [2023-11-21 22:22:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:22:54,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:22:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:22:55,664 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 22:22:55,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1056285019] [2023-11-21 22:22:55,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1056285019] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:22:55,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:22:55,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-21 22:22:55,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881840191] [2023-11-21 22:22:55,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:22:55,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 22:22:55,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 22:22:55,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 22:22:55,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:22:57,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 50 [2023-11-21 22:22:57,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 80 transitions, 543 flow. Second operand has 11 states, 11 states have (on average 24.727272727272727) internal successors, (272), 11 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:22:57,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:22:57,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 50 [2023-11-21 22:22:57,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:23:01,223 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 []